Circulation pumping stations. Requirements for suction and pressure pipes of pumping waterworks

Purpose of pumping waterworks

Pumping water supply stations (PNS) are used for drinking, household and industrial water supply, in other words, for transporting water to facilities and consumers. Pumping water stations are also used for fire extinguishing systems.

Pumping stations are the most important component of water supply systems in general. Depending on the installation scheme, structurally, the VNS includes: from 2 to 6 pumps with electric motors, suction pipes and pressure conduits, water meters, gate valves, check valves, tanks and switching chambers. The pumping station is equipped with a special shutoff valves, as well as control measuring instruments.

The station is provided with electric lighting and heating.

Classification of pumping waterworks

According to its purpose and installation methods in plumbing systems pumping stations divided into the following types:

• pumping water supply station 1 (first) rise;
• pumping waterworks of the 2nd (second) rise;
• pump booster station;
• pump circulation station.

Pumping waterworks of the first rise must supply water from the source to the treatment systems (if the water needs to be treated) or directly directly to the water distribution network, structure or water tower.

Pumping stations of the second lift must be supplied with water from tanks with purified water, in which water accumulates after passing treatment facilities, to water towers or to water distribution networks.

Pumping stations are used to increase and maintain pressure in water supply networks.

With the help of circulation pumping stations, waste water in industrial systems supplied to cooling and treatment systems and then returned back to the system for industrial use.

According to the organization of uninterrupted operation, pumping stations are classified into three classes:

• I (first) class - interruptions in the operation of pumps are not allowed;
• II (second) class - interruptions in the operation of pumps are allowed for the time necessary to put into operation (switch on) standby pumps;
• III (third) class - a possible interruption of the water supply in time, which is necessary to eliminate the accident.

To ensure the reliability and continuity of water injection, standby units (pumps) are provided at waterworks. The number of standby pumps and equipment is determined according to the specifications.

VNS performance

The water pressure in the system is determined by the terrain and the value of the free pressure in the system.

To select the performance and type of VNS pumps, it is necessary to take into account what volume of water the water supply object consumes, the mode of water consumption, as well as the size of the control tanks (reservoirs). AT without fail the joint operation of the pumps of the water supply network is taken into account.

Requirements for suction and pressure pipes of pumping waterworks

The diameter of the pipes (suction and pressure) inside the pumping stations is determined by the diameter, depending on the recommended water flow rate through them.

• in the range of 1.00 - 1.20 meters per second (with a pipe diameter of less than 250 millimeters);
• in the range of 1.20 - 1.60 meters per second (with a pipe diameter of more than 250 millimeters).

For pipes (pressure) the speed values ​​are different:

• in the range of 1.50 - 2.00 meters per second (with a pipe diameter of less than 250 millimeters);
• in the range of 2.00 - 2.50 meters per second (with a pipe diameter of more than 250 millimeters).

It is possible to increase the calculated water velocity in pressure pipes in relation to economic velocities by using pipes of a smaller diameter. As a result, it is possible to reduce the size of the housings of pumping waterworks.

VNS equipment installation diagrams

For the purpose of ease of installation and subsequent operation of the equipment of pumping waterworks, it is advisable to use pumps of the same type and the same capacity.

Pumps inside the housing of pumping waterworks can be mounted (located) according to several schemes:

• in one row, while the axes are parallel;
• in one row, while the axes are located along one axis;
• two or more rows, while the axes are parallel in each of the rows;
• two rows, while the axes are located in one straight line in each row.

The approved layout of pumping units in the housing (building) of the pumping station in accordance with regulatory requirements should ensure the compact dimensions of the station building itself, ease of installation and dismantling of equipment, as well as simplicity and ease of operation of the technical means of the pumping station. To do this, before making a decision on the choice of the installation scheme of the station units, the following is analyzed and taken into account:

• specific plant design conditions;
• dimensions and required amount pumping units;
• the need to deepen the pumping station into the ground, while production work;
• the size and number of suction chambers of the well (water intake);
• dimensions and number of tanks (tanks) for clean water;
• the state of the fittings, which are equipped with pressure pipelines;
• other important factors and conditions.
• To increase the reliability of the waterworks, pumps must be installed under the bay, when the liquid level in the tank (tank, reservoir) is the lowest. If the axis of the waterworks pump is above the lower water level, then it must be taken into account that this excess is less than the permissible height or suction level of the pumps by exactly the value (value) of the pressure loss of the water head in the suction pipeline.

Engine room of the water pumping station

The dimensions of the machine part of the pumping station are calculated based on the standard width of the passages:

• directly between pump units - from one to 1.2 meters;
• between the wall of the building and the units - from 0.70 to 1.00 meters;
• between the foundation on which the units are mounted and the switchboard - 1.5 meters;
• between static protruding equipment nodes - 0.7 meters.

The engine room of the pumping station is necessarily equipped with additional units:

• vacuum - pumps for filling the main pumps when they are started, if the pumps are not mounted under the bay (in pumping waterworks of the third class it is allowed to install a suction valve on the suction line for this purpose);
• drainage pumps that remove seeped groundwater from pumping station buildings that are buried;
• lifting and transport mechanisms that are used to install and dismantle the main technical equipment of the station (overhead crane (beam), overhead crane, hoist with a cat, etc.).

Features of installation of communications of pumping waterworks

Communications of pumping stations must be carried out steel pipes at the weld. Fittings and pumps are connected to pipes using flanges. All pipelines and fittings should be placed on supports.

As a rule, all pressure and suction pipelines in the housing (room) of the pumping station are laid above the floor surface. In exceptional cases, their installation in basements or in channels closed with removable shields is allowed.

Regardless of the number of pumps, there must be at least two suction lines. It is advisable to equip the suction lines with valves. This makes it possible to dismantle the pumps in any conditions (modes) of their operation, and it will also be possible to connect two or more pumps to the suction lines.

The main attention must be paid to the installation of suction pipes, when installed in facilities that purify water, since air should not be sucked into the pipes and sediment from the bottom of the treatment plant should not be drawn in.

When installing the pressure lines of the pumping station, they are equipped with valves. Check valves are installed between the valve and the pump.

For continuous measurement and accounting of the flow of water pumped by the pumps of the station, water meters are installed in the engine room directly on the pressure pipelines.

VNS power supply

In order to ensure the uninterrupted operation of pumping water supply stations, backup transformers are installed at transformer substations to ensure 100% reserve.

To provide backup power to pumping stations, they are connected to two independent power sources, powered by two separated feeders around the ring, or standby units are installed at power plants.

A low voltage shield is installed in the engine room. It is needed to receive and distribute electricity. Low-voltage devices, devices and connections are mounted on the low-voltage switchboard.

To start pumps of small and medium power at pumping stations, synchronous and asynchronous electric motors operating on alternating current and mains voltage 220/300 or 500V.

For pumping units of high power (more than 200 kW), electric motors operating on alternating current with a voltage of 3000 and 6000 V are used.

Automation of pumping waterworks

At automated pumping waterworks, all operations that are associated with starting, stopping equipment, control technical condition pumping and power equipment are carried out in a programmed sequence by automatic machines with little or no participation of maintenance personnel. The human factor is present only during the establishment, start-up and periodic inspection equipment of the automated system.

Automation of the VNS operation is carried out by connecting instruments and devices into a single circuit automated control. Deployed schemes for automating the main working stages of a pumping station are in great demand. In the expanded schemes, the working units, as well as the connections between them, are arranged in the order in which the devices perform operations.

The pumps are started and then stopped by impulses from special relays. Relays record the water level in tanks (reservoirs) or tanks of water supply (pressure) towers, as well as changes in pressure in the water supply network. These changes in the form of pulses from the relay control the operation of the pumps.

The most commonly used relays are:

1. Float-type level switch, which consists of a rocker arm and a contact device. A float is lowered into the water tank, which is suspended on a thread and thrown over the block. The float is balanced by the weight. Two switching washers are attached to the thread at different levels. When the maximum or minimum liquid level in the tank is reached, the washers rotate the rocker arm, which closes the contacts. The corresponding contacts open or close the control circuits of the pumping units, thus signaling that the water has reached the limit levels in the tank.
2. The electrode level switch in its composition has electrodes and coils of the starting relay. When the maximum water level reaches the corresponding electrode, the starting relay circuit is closed, the relay is activated and turns on the electric pump control circuit. If the water level reaches the lower electrode, the relay de-energizes and opens the control circuit. The electrode relay operates on alternating current.
3. The pressure switch, or electronic contact pressure gauge, consists of a spring (tubular) that is connected to a pipe and connected to an arrow. The arrow has a moving contact. If the water pressure in the pipeline changes, the moving contact on the arrow closes with the desired fixed contact. As a result, the pump control (executive) circuit closes and opens.

The sequence of operation of a typical pumping station

The frequency converter, having received a signal from the pressure sensor, smoothly starts the first pump. If water consumption melts, then the frequency increases. When the frequency reaches the maximum value, the pump is directly connected to the mains. The frequency converter, in turn, is disconnected from the first pump and smoothly starts to start the second pump. If the performance of two pumps is insufficient, the second pump is also directly connected to the mains, and a frequency converter the third pump begins to accelerate. In the same sequence, the remaining pumps of the pumping waterworks are started. The advantages of such a scheme for starting pumps in saving electrical energy and achieving high accuracy of pressure maintenance. Recommended for pumps up to 55 kW.

Types of water supply pumping stations are classified according to several parameters in accordance with the functions performed and the nature of the installation. The general purpose of all pumping stations is to increase the pressure of water supplied to the water supply systems of private consumers and industrial facilities. There are five categories of pumping stations:

1. Stations of the first rise of the National Assembly 1;
2. Stations of the second lift NS 2;
3. Stations of subsequent rises HC 3 and beyond, depending on the required level of water rise;
4. NSP swap stations;
5. CNS circulating stations;

Principles of operation of water supply pumping stations

The schematic diagram for connecting water supply elements looks like a series connection of structural modules, each of which is an important link in the water supply chain:

1. pumping stations of different lifting levels;
2. pumping station;
3. water intake device;
4. storage tanks;
5. treatment facilities;
6. water tower;
7. plumbing network.

First lift pumping stations

Pumping stations of the first lift are connected to the water intake device and pump water to facilities designed for water purification. In some cases, purification is not required, and water flows directly into storage tanks, which can be both water tanks of the RCHV, and water towers and hydropneumatic tanks. Cases when water from the first lift station enters the water supply system are quite rare, but nevertheless they occur. During the day, such stations operate in a uniform mode, without interruptions.

Second lift pumping stations

Second lift pumping stations take water from clean water tanks and pump it either directly to water supply systems or to water towers. The main function of the towers is to ensure uninterrupted water supply to consumers under uneven load. Stations of the second rise operate in intermittent mode, as close as possible to the modes of consumption of water supply facilities.

Pumping stations and circulation stations

If it is necessary to provide an increased level of water pressure, as a rule, required in industrial enterprises and in high-rise buildings, pumping stations are used. The mode of operation of such stations is inextricably linked with the schedule of water consumption of objects.

Circulation-type pumping stations are installed at industrial facilities and are a link closed system water supply.

Such stations have three types of pumps, divided by purpose:

1. Pumping over the fulfilled carrier in cooling tanks;
2. Supplying water to the purification modules;
3. Providing water supply to equipment or for technical processes.

Circulation pumps operate according to the schedule approved at the factory.

Classification of pumping stations

The scope of pumping stations, their design and installation method underlie the classification of equipment. There are options for mounting pumps in vertical and horizontal versions, with positive and negative water intake heights.

Premises intended for the organization of machine rooms can be buried, semi-buried and not buried. The engine room of semi-buried stations is divided into two levels, ground and underground, and buried stations do not have a surface part at all. According to the type of equipment control, manual, automatic, semi-automatic and remote systems are divided.

Categorization of pumping stations by water supply level

Pumping stations for water supply are divided into three types according to the level of water supply. The differences are in the maximum water supply interruption time, the number of people served and the duration of the decrease in the water supply level.

A break in the operation of stations is necessary for scheduled repairs or replacement of equipment and switching to a backup set. Accordingly, the higher the category of the pumping station, the higher the requirements for it. Industrial enterprises, as a rule, pumping stations of the first category are used in operation.

Pumping stations of the first and second categories must have at least two sources of power supply that are independent of each other. In addition, certain requirements are imposed on stations of each type in terms of reliability, the availability of redundant modules and the solidity of the premises intended for machine rooms.

12. Pumps. Water pumps according to their purpose are distinguished as:

water-lifting: designed to extract water from wells, wells and raise it to the desired height;

drainage: designed to pump water from basements, cellars or pits. Drainage pumps also include fecal pumps, the scope of their application is obvious from the name;

circulation: specialized pumps, the task of which is to maintain constant circulation, or in other words - the movement of water in the heating system of the house.

Drainage and fecal pumps

Saer Mino-33. Drainage pump (Italy)

The maximum productivity is 72 liters per minute. The maximum head is 6 meters. Supply voltage 220 V. Power up to 180 W. Connecting dimensions: output 1 inch. Dimensions: 144x140x271 mm. Weight: 3.7 kg. In order for the pump to work properly, it is necessary to follow the operating rules: Saer recommends storing, transporting and operating drainage pumps in an upright position.

Saer PD 503/PD 505. Drainage pumps (Italy)

Maximum productivity 350/500 liters per minute. The maximum head is 11 and 16 meters, respectively. Supply voltage 220 V. Maximum power 562/1125 W. Connecting dimensions: output 1.25 inches. Dimensions: 232x220x416 mm. Weight: 10/11 kg. The high power and performance of these models allows them to be used for pumping large volumes of water (pools, tanks) or for lowering the level ground water. For supplying water to homes, farms or gardens from shallow wells, these submersible pumps are also suitable. For the safe operation of high power pumps, it is very important to use protective automation. These models are equipped with start-up protection devices built into the housing and are equipped with float switches.

Nocchi pumps Vip 130/6 Auto. Drainage pump (Italy)

The maximum productivity is 130 liters per minute. The maximum head is 6 meters. Supply voltage 220 V. Power 320 W. Connecting dimensions: output 1.25 inches. Dimensions: 290x165x165 mm. Weight: 4.5 kg. VIP is a very simple and cheap series of pumps from the Italian company Nocchi pumps. Vip 130/6 is a drainage type model that has a fairly good performance with a very compact size and low weight. One hundred and thirty liters per minute - this means that the pump can not only pump water from the basement, but also pump large volumes from one container to another. Using auxiliary equipment, like an impressive barrel that will act as storage tank, you can even build a simplified model of a water pipe. For the sake of convenience and safety of operation, pumps are usually equipped with a float switch, which saves Vip (which, as it should be with a water pump, is afraid of "dry running") from very unpleasant problems. For normal operation of the pump, the water level must be at least 8 cm. If there is no "float", then the owner will have to monitor the level himself and be very vigilant.

Nocchi pumps Vort 150/7 Auto. Fecal pump (Italy)

The maximum productivity is 130 liters per minute. The maximum head is 7 meters. Supply voltage 220 V. Power 370 W. Connecting dimensions: output 1.25 inches. Dimensions: 300x165x165 mm. Weight: 4.5 kg. This Nocchi pumps is fecal. Vort 150/7 is a low power unit, it is perfect for any owner of the site, unless, of course, the owner is worried about the sanitary conditions on his site and does not want to postpone cleaning famous place until it becomes a real problem. By placing the pump in a cesspool, you can forget about it, all that the machine needs to work is electricity and a "working environment". As befits a fecal pump, the Vort 150/7 Auto is adapted to pumping liquids with large quantity large suspensions. Most of its parts are made of aluminum and stainless steel. The pump perfectly withstands contact with aggressive alkaline media (the chemical resistance of the device allows it to be used even for pumping highly chlorinated water, for example, from swimming pools). However, for this purpose it is better to choose a more productive model of the Vort series, for example, the Vort 350.

Speroni STG-200/350. Drainage pumps (Italy)

Maximum productivity 90/180 liters per minute. The maximum pressure is 5/6 meters. Supply voltage 220 V. Maximum power 200/350 W. Connecting dimensions: inlet and outlet - 1 inch. Dimensions: 232x220x416 mm. Weight: 5.6 kg. Speroni STG-200 and STG-350 are drainage pumps with low and medium power and head. However, for all their simplicity, these are automatic devices, with all the "ensuing" advantages. The pumps are equipped with a float switch, which greatly simplifies operation and protects equipment from the vicissitudes of fate such as "dry running". Install such a pump in a cellar flooded from time to time, connect it to the network and do other things. As soon as enough water has accumulated in the cellar, the pump will automatically turn on, pump it out and turn off automatically, then turn on and pump it out again, and so on. Both pumps feature a compact, low casing, which is made of durable plastic. The impeller is also plastic, but the engine is hidden in an aluminum "glass". Due to the use of a large number of plastic parts in pumps, care must be taken to ensure that the water pumped by the pump is clean. Sand, clay and other abrasive suspensions can significantly reduce the already difficult and not always long life of pumps.

Wilo TMW 30-0.2 IU. Fecal pump (Germany)

Productivity up to 72 liters per minute. Head up to 30 meters. Supply voltage 220 V. Power up to 700 W. Connecting dimensions: output - 1 inch. Dimensions: 230x165x165 mm. Weight: 4.3 kg. Wilo TMW30-0.2 EM is a medium-capacity drainage pump designed for pumping out contaminated water without large inclusions, solid (abrasive suspensions). It is perfectly suited for long-term operation in alkaline environments, for example, with soapy water (draining washing and dishwashers, wash basins, etc.). By the way, this is a rather important detail that you should pay attention to when choosing such a unit. The problem is that the discharge of alkaline water (including soapy water) into cesspools leads to the formation of solid lumps (slags) at its bottom, which can greatly clog both the pit itself and, in the future, the fecal pump. TMW 30-0.2 IU is designed to solve these problems. It ensures efficient mixing of the medium in the suction area. This prevents the formation of large lumps of slag, and the pump copes with the contents of the waste pit. Hygienic cleaning also removes odors. The service life of the pump is quite long, despite its plastic "essence".

Grundfos KP-150/KP-250/KP-350. Drainage pumps (Germany)

Maximum productivity: respectively 133, 183 and 233 liters per minute. Maximum head: 5.5; 7.5 and 9.5 m. Supply voltage 220 V. Power up to 700 W. Connecting dimensions: output 1 inch. Dimensions: 149x149x225 mm (KR-150), 149x149x225 mm (KR-250), 158x158x255 mm (KR-350). Weight: 5.5 kg; 7.0 kg and 8.2 kg, respectively. All models of the Grundfos KP series are made of especially strong corrosion-resistant chromium-nickel steel and are very versatile. Firstly, they are able to pump both clean and dirty water from maximum dimensions solid suspensions up to 10 mm in diameter. Good "resistance" of pumps to abrasive impurities allows them to drain foundation pits or lower the groundwater level when digging holes. Secondly, hot water these pumps are also "too tough": the pumps normally operate in an environment heated to a temperature of 45-55 degrees Celsius (or for a short time - up to 70 degrees). Thirdly, CR can also be used for pumping alkaline water (for example, after draining soapy water from a washing machine), as well as highly chlorinated pool water. It is important that with all their advantages, the pumps of the KP series are also very economical.

Ebaro Best Zero. Drainage pump (Italy)

The maximum productivity is 170 liters per minute. The maximum head is 7.5 meters. Supply voltage 220 V. Maximum power 180 W. Connecting dimensions: output - 1 inch. Dimensions: 150x150x225 mm. Weight: 4.5 kg. In principle, Best Zero has all the makings to be used both as a drainage and as fecal pump. This is evidenced by the choice of materials used in the manufacture of the device - the pump is made of special corrosion-resistant stainless steel, which has a very beneficial effect on its durability and wear resistance. The environmental friendliness of "stainless steel" is well known, so clean water pumped by the pump will always be clean. The chemical inertness of stainless steel has a beneficial effect on work with more aggressive media than spring water. For example, Best Zero is capable of pumping out alkaline solutions without harm to itself, the only requirement is that the environment should not be very hot, no more than +50 degrees Celsius. This powerful pump is very sensitive to low water levels: in short-term operation, Best Zero can be used with a minimum water level of 9 centimeters. Like virtually all submersible drainage pumps, the Best Zero should only be stored, transported and operated in an upright position. However, the convenient handle on the top of the pump makes the vertical position of the pump more natural.

Ebaro DW/DW VOX. Fecal pumps (Italy)

The maximum productivity is 700 liters per minute. Head up to 18 meters. Supply voltage 220 V. Maximum power 1100/1500 W. Connecting dimensions: output - 1 inch. Dimensions: 295x165x165 mm. Weight: 4.5 kg. Characteristic representatives of the group of pumps for dirty water are DW and DW VOX of the Italian company Ebaro. These are very powerful devices designed for pumping large volumes of liquid. The unpretentiousness of the pumps is such that it allows pumping out water even with very large and solid suspensions - up to 50 mm in diameter! This is very high rate for domestic fecal pump. Therefore, you do not have to worry about these units: they are perfectly adapted to work in the most extreme conditions and they will not break the "teeth" (or rather the impeller) on the largest hard clods. The DW and DW VOX are made entirely of non-oxidizing stamped stainless steel and have a double greased seal (silicon carbide and carbon-ceramic). Thanks to the use of extremely durable materials such as ceramics and silicon carbide, the friction parts of the pump are almost never subject to wear and always remain tight. All this is done in order to maximize the life of the pumps.

Pedrillo Top 1/Top 2. Drainage pumps (Italy)

Productivity up to 170 liters per minute. The maximum immersion depth is 3 m. The head is up to 6 m. The supply voltage is 220 V. Connecting dimensions: output - 1 inch and 1.25 inches, respectively. Dimensions: 152x152x230 mm (Top 1), 152x152x255 mm (Top 2). Weight: 3.8/4.5 kg. Top pumps are designed for pumping both clean and contaminated water, the density of which does not exceed 1.1 kilograms per liter. These are small devices, and their power is also small. However, Thor 1 and Thor 2 are not so simple as it might seem at first glance: they are capable of sucking in water with solid suspensions, the diameter of which can reach 10 millimeters, and this is not at all small, they are equipped with a thermal relay to protect the engine from overload, which in itself yourself a rarity among pumps in this price range. Another one interesting feature- they can also be operated in a partially submerged state, and continuously, and not for a short time, like most other pumps. At the same time, the water level can drop to a record low of 14 mm. In fairness, it should be noted that the pumps are sensitive to voltage drops below 220 V. In addition, the low power of the pumps determines the very low height of the water rise - they can only 3 meters.

Surface or submersible pump

The most common sources of water are wells (the depth, as a rule, does not exceed 10-15 meters) and wells (the depth is calculated in tens of meters). This is related to the structural classification of pumps into surface and submersible. Surface are placed "on land": in the house or next to the well. Submersible (borehole) pumps at the end of the hose are lowered into the well. Surface pumps usually cheaper, but have significant limitations in suction depth. So, to raise water from a depth of no more than 8-9 meters, a simple pump is used without any tricky devices, and for transportation from depths of about 20-30 meters, you have to resort to various tricks. In particular, an ejector is used for these purposes: a special device lowered into a well at the end of a hose. When the pump is running, part of the raised water is pumped through an additional hose back into the ejector, this flow, as it were, pushes the water out from below. All this, of course, affects performance: with increasing depth, the performance of a surface pump with an ejector drops catastrophically, while power consumption and design complexity increase. As a result, in the area of ​​depths of about 25 meters, the prices for surface and borehole pumps are almost equalized, and at depths above 30 meters, the benefit is on the side of the borehole systems.

Surface pumps

Grundfos JP 5/ JP 6. Surface pumps (Germany)

Productivity up to 580/750 liters per minute. Suction depth 8 meters. Pressure up to 40-48 meters. Supply voltage 220 V. Power up to 775/1400 W. Connecting dimensions: inlet -1 inch, outlet - 1 inch. Dimensions 364x206x306 mm. Weight: 9/12 kg. Grundfos JP 5/6 are small pumps designed for country house and garden. Both models are compact, light and easy to transport (the pump has a special handle to make it easier to carry). Thanks to this, they can be installed almost anywhere you need, and then just as easy to remove. At the same time, the power of the "little ones" inspires respect, and the productivity of 750 liters per minute is more than enough for any needs of a summer resident. JP models act as if "semi-finished products" of automatic water supply stations, but they also have independent significance. For example, such a pump is quite capable of filling or draining a medium-sized pool or pumping species from tanks. Grundfos has made sure that their equipment delivers a minimum of problems to its owner. The use of chrome-nickel steel in the pumps makes them very strong and durable. Regular maintenance is virtually non-existent: ball bearings don't need to be lubricated (pressed-in solid lubricant lasts the life of the pump), reliable mechanical seals don't leak, and water never enters the engine compartment.

Grundfos Jetra Q. Surface pump (Germany)

Capacity up to 750 liters per minute. Suction depth 8 meters. Pressure up to 45 meters. Supply voltage 220 V. Power up to 1500 W. Connecting dimensions: inlet - 1 inch, outlet - 1 inch. Dimensions: 458x150x313 mm. Weight: 9.8 kg. Grundfos JQ is "more serious" than the JP series models. In fact, a whole automatic station with a small pressure tank is concentrated here in the pump housing. True, the task of this tank is not the accumulation of water, but only the mitigation of hydrodynamic shocks. Instead of a relay (it is responsible for maintaining the pressure in the system of most automatic stations, turns on / off the engine when necessary), JetpaQ has a built-in microfrequency converter. This device allows you to smoothly adjust the engine speed and, thus, adjust the pump performance to the water flow. The absence of a traditional water tank makes the Jetra Q very compact, requiring about three times less space than traditional water stations. The pump motor does not "survive" frequent on / off, which, of course, would be to his detriment. And since the engine speed changes smoothly, the life of the pump increases. The Grundfos JQ body and impeller are made of plastic, while the pressure tank is made of environmentally friendly stainless steel. It is important that the pump is not afraid of getting a jet of water, condensate and humidity, this allows you to place it in almost any place convenient for the owner.

Saer KF1/KF2, M60/M70. Surface pumps (Italy)

The maximum productivity of KF1 - 40 l/min; KF2 - 60 l/min; M60 - 45 l/min.; M70 - 40 l/min. Suction depth KF1 and KF2 - 7 m; M60 and M70 - 9 m. Maximum pressure KF1 - 40 m; KF2 - 64 m; M60 - 47 m; M70 - 52 m. Supply voltage 220 V. Maximum power from 370 to 1500 W, depending on the model. Connecting dimensions: inlet 1 inch, outlet 1 inch. Dimensions: 400x230x242 mm. Weight: about 9 kg. Saer pays great attention to surface equipment. Evidence of this is the number of models included in the two main series KF and M - (in addition to the M60 and M70, the M series includes several more pumps that are distinguished by greater performance, suction depth and pressure). Pumps of the KF series are not equipped with an ejector, they are able to take water from a depth of no more than 7 meters. They are simple, cheap, and reasonable to use for drawing water from shallow wells or open water. Models of the M series are available with both internal and external ejectors, they perfectly pump water from almost any well or shallow well. The casings of both series are made of cast iron, while the impellers are made of plastic. If you carefully read the operating conditions and strictly follow the requirements, then the pumps will not require repair for many years. In principle, any of the surface pumps can be converted into an automatic station by adding a pressure tank and a pressure switch manufactured by the same company Saer. Whether this is always advisable is another question.

Wilo WiloJet 201EM/301EM/401EM. Surface self-priming pumps (Germany)

Maximum productivity 201EM 45 l/min.; 301EM - 60 l/min.; 401EM - 80 l/min. Suction depth up to 7 meters. The maximum pressure is 42, 45 and 47 meters, respectively. Supply voltage 220 V. Power 800 W. Connecting dimensions: inlet - 1 inch, outlet -1 inch. Dimensions: 201EM - 342x330x216 mm; 301EM - 425x330x216 mm; 401EM - 425x330x216 mm. Weight: 9.8 kg; 12.8 kg and 13 kg respectively. This series of pumps is perfectly suited for pumping clean and slightly polluted water without solid suspensions. Models are completely made of steel, differ in durability and reliability. However, it should be borne in mind that, since the Wilojet does not really “favor” solid suspensions, it is not superfluous to put a filter at the pump inlet before starting operation (if the water quality is in doubt). The power reserve allows this to be done. Among other advantages of the Wilojet, one should especially note their noiselessness - they really work very quietly. For operational safety, the pumps are equipped with thermal protection to prevent motor failure in case of overload or overheating. Devices marked EM are designed to operate from a single-phase current network. However, Wilo, like many other manufacturers, produces models for three-phase current networks. These models are marked DM. So be careful.

Speroni AWP 75/100/150/200. Surface pumps with external ejector (Italy)

Maximum productivity of AWP 75/100 - 35 l/min.; AWP 150/200 - 60 l/min, (capacity depends on suction depth and ejector type). Maximum suction depth AWP 75 - 25 m; AWP 100 - 35 m; AWP 150 and AWP 200 - 50 m. Maximum pressure AWP 75 - 30 m; ARM 100 - 38 m; AWP 150 and AWP 200 - 50 m. Supply voltage 220 V. Power from 590 to 1650 W, depending on the model. Connecting dimensions: inlet - 1 inch, outlet - 1 inch, ejector inlet - 1.25 inches. Dimensions: 430x190x205 (models ARM 75 and 100), 450x230x250 (models ARM 150 and 200) mm. Weight: 16.7 kg to 27.7 kg. A distinctive feature of these models is the presence of an external ejector and a large suction depth, up to 50 meters (capacity at a maximum depth of 60 liters per minute). In general, the ejector as part of a non-automatic pump is not an ordinary phenomenon, it is mainly supplied by water intake stations. But it happens that, for example, water is taken from great depths only occasionally and it is a pity because of this to lay out a lot of money (a pump for a well is not cheap equipment), then, obviously, it is worth taking a closer look at the Speroni "hybrids". Other possible application ARM pumps - continuous water intake from a great depth (for example, to fill a large catchment tank), while automation is also not required. When buying a pump, it should be remembered that any model of the APM series can be equipped with one of two ejectors - P 20 or P 30, which one to choose depends on the depth of the well. R 20 is designed for shallower depths (up to 15 meters, if it pumps AWP 75, and up to 25 meters, if AWP 200), R 30 works at maximum depths - 45-50 meters. For a more accurate selection of the required pump-ejector pair, there are special tables. Pumps of this series are very reliable and durable. Their bodies and ejectors are made of cast iron, and the impellers and ejector nozzles are made of wear-resistant plastic. In the store you can see Speroni models marked AP - these are the same APM pumps, but designed to be powered by three-phase current with a voltage of 380 or 220 V.

Ebaro JEX/JESX. Surface self-priming pumps (Italy)

The maximum productivity of JEX - 60 l/min, JESX - 43 l/min. Suction depth up to 7 meters. Pressure up to 42 meters. Supply voltage 220 V. Power from 360 to 1100 W. Connecting dimensions: inlet - 1.25 inches (JEX) and 1 inch (JESX), outlet 1 inch. Dimensions: 462x265x222 mm (JEX) and 372x220x182 mm (JESX). Weight: 11.5 kg and 5.5 kg respectively. Ebaro has recently appeared on Russian market, but its products are worth paying attention to. Ebaro models are classic household pumps for a country house. Their pressure and performance are such that they allow the use of equipment not only for watering the garden or washing the car, but also for supplying water to a small country house (although for this it is better to "hang" automation on the pump, turning it into an automatic water supply station - in this form the pump will be much easier to operate). The pumps are completely made of stainless steel: housing, motor support, disc with seal, motor housing, impeller cover. The impeller of the JEX model is also made of stainless steel, and the JESX impeller is made of plastic.

BABY. household pump(Russia)

The maximum productivity is not less than 72 liters per minute. Lifting height (suction depth) 40 meters. The maximum immersion depth of the electric pump is 3 meters. AC voltage 220 V. Rated power at pressure 4 atm. - 245 W. Dimensions: 280x99x99 mm. Weight: 3.5 kg. The name of the electric pump "Baby" speaks for itself. This compact device is light in weight and very convenient for domestic use. It is ideal for lifting water from wells and wells from any depth in the range from 0 to 40 meters, as well as for pumping fresh water from any reservoirs (unless, of course, the water is too polluted). Like any similar pump, "Kid" has limitations on the temperature of the pumped water - it should not exceed +35 degrees Celsius. Not very "hot", so you need to monitor the temperature of the water especially carefully. Otherwise, the electric pump is unpretentious: it does not require lubrication and filling with water and is put into operation immediately after immersion in water. It can be used for any weather conditions, immerse in water (and remove only for routine inspection). "Baby" is not picky about the supply voltage either: if the voltage in the network jumps, this only leads to a decrease in water pressure.

Pumping station

An ordinary non-automatic pump, if a relay and a hydraulic accumulator (water tank) are "attached" to it, will turn into an automatic water supply station. A water tank is a sealed container made of food grade stainless steel, partitioned inside with a special rubber or rubber membrane. Part of the tank is filled with air under pressure (you can pump air into it using an ordinary car pump). The other part of the tank is filled with water when the pump is running. The relay monitors the pressure in the tank, water is pumped until the pressure reaches the set upper threshold. After that, the pump is switched off. It is worth opening a tap in the water supply system to which the station is connected, as water begins to flow out of the tank. If the owner simply decides to drink, the pump will not even turn on, the entire flow will be covered by a small pressure drop in the tank. If we are talking about generous watering, then the pressure in the tank drops below a predetermined threshold and the relay turns on the pump. Everything repeats again. Obviously, the larger the tank, the less often the pump will turn on. The volume of the accumulator, depending on the model and configuration, can be 30 or 1000 liters or more. Moreover, the price is directly proportional to the volume.

Pumping stations

Grundfos Hydrojet JP5/JP6. Pump stations (Germany)

The maximum productivity is 50/65 liters per minute. Maximum head 30/48 meters. Suction depth 8 meters. The maximum working pressure is 6 atm. Hydraulic accumulator 20 or 50 l. Supply voltage: 220-230 V, 220-240 V. Power: 775 W/1.4 kW. Inlet and outlet - 1 inch. Dimensions: 530x264x640; 590x391x765 mm. Weight: 16.4 to 27.5 kg. A family of 6-7 people will be quite happy with the operation of a pumping station like these. There would be water, and a pump like Hydrojet JP5 or JP6 will provide three or four taps and two showers open at the same time without any problems. Of course, these are expensive models, but "German" quality and great resource the work is worth it. The Hydrojet is equipped with a soft starter and a thermal relay in case of overheating and motor overload to increase the reliability of the machine. If this is not enough, you can additionally install dry running protection. Hydrojet stations are made of stainless steel, which is highly hard and malleable at the same time. As a result - high wear resistance and strength. All models of Hydrojet stations are compact and operate almost silently. These units can be easily installed directly on country kitchen under the sink, and the sound of water from the tap will drown out the operation of the pump. The rubber used is used in the food industry. It is better to buy such pumps from official dealers of the company, from whom you can consult on the installation and adaptation of the units to voltage drops in the network - it's no secret to anyone that our out-of-town power supply can "piss off" anyone and anything.

Speroni CAM 60/25, 66/25. Pumping station (Italy)

Maximum productivity 50/63 liters per minute. Maximum head 45/50 meters. Suction depth 8 meters. Pressure on/off 1.5-2.8; 1.5-3.0 atmospheres. Hydraulic accumulator 25 liters. Supply voltage: 220 V. Power 0.8/1 kW. Inlet and outlet - 1 inch. Dimensions: 56x30x53 cm. CAM 60/25 and 66/25 stations are compact, convenient, well suited for use in country houses, dachas or cottages. They are able to supply water to a family of three to four people. The pumping station uses a traditional combination of materials: a cast-iron casing and an impeller made of special high-strength plastic. In addition to CAM 60/25 and CAM 66/25, Speroni also produces other pumping stations with different performance and power in the CAM series.

Saer TK1. Pumping station (Italy)

Productivity 17-35 liters per minute. Head 28-13 meters. Suction depth 7 meters. Pressure on/off 1.3-2.8 atm. Hydraulic accumulator 24 l. Power: 220 V. Power 0.37 kW. Inlet - 1 inch, outlet - 1.5 inches. Dimensions: 40x35x56.5 cm. TK1 is a cheap and high-quality pumping station that will help create all urban amenities in the country. This unit is designed to simultaneously provide 2-4 points of water flow. It is mainly used for water intake from shallow wells with clean water (by the way, water is considered clean if the amount of suspension does not exceed 50 grams per cubic meter). TK1 may well be used by summer residents to increase pressure in the "local" water supply networks, which were once built by summer cottage cooperatives. The body of the station is made of cast iron, the impeller is made of bronze. Is this good or bad? If the water is without solid suspensions, then the bronze impeller "behaves" better than the plastic one, otherwise the brittle bronze can simply crack. If the water is chlorinated, then the use of such a pumping station is undesirable. Speaking about the case, it should be noted that cast iron is better than plastic in terms of strength, but it loses to it in environmental friendliness: cast iron is subject to corrosion, rust enters the water and degrades its quality. The environmental friendliness of the pump is determined not only by the material of the housing, but also by the membrane located in the accumulator. And so in these stations food rubber is applied. In addition to this model, Saer produces two series of pumping stations TK and TR with a capacity of up to 98 liters per minute and a power of up to 1.5 kilowatts. There are also models with steel cases and hydraulic accumulators with a capacity of 24 and 60 liters.

Nocchi pumps Superinox 1000-Drop. Pumping station (Italy)

The maximum productivity is 3600 liters per hour. The maximum pressure is 46 meters. Suction depth 7 meters. Pressure on/off 2-3 atm. Hydraulic accumulator 24 liters. Power: 220-240 V. Power 0.8 kW. Inlet and outlet 1 inch. Dimensions: 53x28x58 cm. Weight 9.9 kg. Superinox 1000-Drop is popular with those who value high strength, reliability and practicality in equipment. The model is completely made of stainless steel (both the impeller and the casing), but, despite this, it has a relatively low weight. Manufacturers promise that correct operation the pumping station will last at least 10 years. In addition, stainless steel is not subject to corrosion, which means that the water will be clean. The reliability of the Superinos 1000-Drop station is ensured by a thermal relay that will take the worry and worry out of motor overheating or overload. If there is even the slightest deviation from normal operating conditions, the pump will simply automatically turn off. The engine will start again only when everything is in order. The model also has protection against "dry run". The absolute advantage of the pumping unit is the noiselessness of operation. Such a pump is able to easily provide irrigation of the garden and vegetable garden, plus the operation of four points of water intake. Moreover, due to the significant pressure, the pumping station will perfectly cope with its task of providing water even if the cottage is located on a hill or is a three-, four-story house.

Gardena 6000/3 S. Submersible pump(Germany)

The maximum productivity is 100 liters per minute. Maximum head 33 m. Suction depth 8 meters. Power supply: 220 V. Power 0.8 kW. Inlet and outlet 1 inch. Dimensions: 120x500 mm. Pump diameter 14.9 mm. Weight: 9 kg. The 6000/3 S pump is designed for drawing water from great depths. Equipped with a powerful multi-stage centrifugal mechanism and a float switch for automatic shutdown when the level falls below the permissible level. It can also be used for pumping water with a low content of impurities (except saline solutions and flammable liquids). The motor runs silently, and thanks to the thermal relay, the pump does not burden the need for maintenance. Undoubtedly, this is a big plus, because few people would like to constantly pull out, then immerse the unit back into the well.

Gardena 4000/4 electronic plus. Automatic pump (Germany)

The maximum productivity is 60 liters per minute. The maximum head is 42 meters. Suction depth 9 meters. Power supply: 220 V. Power 0.8 kW. Inlet and outlet 1 inch. Dimensions: 400x260x200 mm. Weight: 10.5 kg. Automatic pump with electronic control great for watering garden plot and water supply country houses and cottages. It will fully meet the needs of a family of 7-8 people. The pump is used for pumping both clean water and water with small impurities. Solutions of fertilizers, pesticides, fuel and diesel fuel can be used as impurities. You can also pump water from swimming pools, which, as you know, often suffer from excess chlorine. Gardena 4000/4 electronic plus has various degrees of protection. For example, when overloaded, the thermal relay will automatically turn off the unit. Shutdown will also occur when the fluid supply is interrupted. The pump turns on when a certain pressure value is reached, which is set by the manufacturer. The owner is free to set the value of the shutdown pressure himself. The pump is equipped with modern electronics, which allows not only to admire the operation of the mechanism and use its "fruits", but also to find out all the parameters of the current operation. Gardena 4000/4 is also good because it does not need technical inspections and in general any maintenance. It only needs to be installed on workplace and fill with water before starting "labor activity".

Gardena 5000/6 Inox electronic plus. Automatic pump (Germany)

The maximum productivity is 84 l/min. The maximum head is 56 meters. Suction depth 8 meters. Power supply: 220 V. Power 1.3 kW. Inlet and outlet 1 inch. Dimensions: 400x260x200 mm. Weight: 15 kg. The 5000/6 Inox electronic plus is the most sophisticated member of the Gardena series of garden pumps in terms of technology. Nevertheless, it is intended for ordinary domestic needs, that is, for irrigation, creating pressure in the water supply system, pumping out and forcing water into or out of tanks. At the same time, water may contain some impurities, but not salts, non-aggressive liquids, and not domestic wastewater. The electric pump is made of stainless steel and has a 4-stage mechanism. One of the advantages of the system is its quiet operation. Model 5000/6 Inox electronic plus does not require close monitoring of itself, thanks to a large number of electronics that complete it, which will smoothly turn on the pump and, if anything (pressure change, overload, stop the water supply), turn it off. The operation of the device can always be monitored. The situation will be "reported" by the LEDs located on the front panel of the control unit. The absence of a hydraulic tank, the individual functions of which are taken over by electronics, significantly reduces the dimensions, and at the same time the cost of the pump.

Grundfos JetSab JS 3-06. Borehole pump (Germany)

Capacity up to 3500 liters per hour. The maximum head is 72 meters. Power: 220-240 V. Power 1.1 kW. 1.25" inlet and outlet. Dimensions: 445x71 mm. Weight: 4.8 kg. They say about this pump like this: "small, but with great capabilities." The model is intended for water supply of individual low-rise houses, cottages, dachas from artesian wells and deep wells. It can serve up to 5 points of water consumption at the same time, fulfills all the needs of a family (up to 7-8 people), who are used to spending water on themselves to the extent necessary and do not forget to regularly water the garden. When additionally equipped with a hydraulic accumulator (tank) and a pressure switch, the pump can operate in automatic mode. Having very small dimensions, JetSab "breaks" into wells from 3 inches and at the same time has great performance. The pump body is made of stainless steel. All other parts are made of sufficiently durable materials that do not affect the quality of the water. JetSab has a soft starter that avoids strong water hammer in the system and high starting currents. This increases reliability, because it is no secret to anyone that any equipment most often breaks down at the moment of switching on and off. The electric motor is also equipped with its own built-in protection and shuts down in case of voltage drop, overload, overheating, excessive overspeed. (Grundfos even guarantees automatic shutdown of the pump in the event of a ripple power surge from a lightning strike). To a number of advantages is added ease of installation and no need for maintenance. Once installed - and forgotten. There are other models of JetSab, with a capacity of up to 5000 liters per hour and a head of up to 121 meters.

Saer NF 95-A/14. Borehole pump (Italy)

Productivity from 600 to 3000 liters per hour. Depending on the height and rise of the water, the pressure is from 76 to 43 meters. Power: 220 V. Power 0.55 kW. 1.25" inlet and outlet. Dimensions: 75x10 cm. Weight: about 10 kg. The household centrifugal pump is designed for pumping clean water from wells and wells, it can also supply water from open reservoirs when additional conditions providing motor cooling. Used in individual low-rise buildings, cottages, dachas. Six members of the family, resting with the conveniences and at the same time doing home gardening, will be quite happy with it: the pump can provide up to 5 water points, depending on the height of the water rise. The device uses an American Franklin electric motor, but if desired, it can be "equipped" with a Saer electric motor. The electric motor is equipped with a thermal relay that protects the unit from overloads. The body is made of stainless steel. The Saer impeller is made of high-strength reinforced plastic. Compared to steel, this is, of course, less reliable, but very decently allows you to reduce the price. The pump is also attractive because it requires little energy and is therefore economical. The pump is supplied with an underwater cable. NF 95-A/14 is only one model in the entire NF series. In addition to it, there are pumps of various capacities with a head from 30 to 338 meters.

Domestic pumps and pumping stations DAB

The company Termogorod Moscow offers to buy circulating pumps, surface pumps, borehole pumps, fecal pumps, well pumps, for gardens and pools, for sewage, pressure boosting, pump automation and automatic pumping stations from the Italian company DAB Pumps.

Why DAB? Why Thermocity?

Our company is the official distributor of DAB Pumps in Russia and has been cooperating with it for over 12 years. During this time, we have seen not only high quality of DAB equipment, but also in the constant striving of its engineers and technologists for unique, innovative solutions that literally “turn over” the world market of pumping equipment.

Specialists of "Termogorod" Moscow:

visited all the factories of the holding in Italy;

constantly participate in the company's seminars and are the first to acquaint Russian users with the latest DAB products;

have unique experience with DAB pumps;

consult and select an analogue of any other manufacturer.

Company "Termogorod" Moscow - choose professionals!

DAB Pumps does not stand still, constantly improving its pumps, offering new models, paying attention even to such seemingly trifles as packaging. Since 2017, all pumps are packaged in a new, three different color styles packaging, with more information content, modern and attractive appearance.

According to international standards, four energy efficiency classes of motors IE1, IE2, IE3 and IE4 have been developed to date.
IE stands for "International Energy Efficiency Class" - an international energy efficiency class. Starting January 1, 2017, all European motor manufacturers (including DAB Pumps), in accordance with the adopted directive, will produce electric motors with an energy efficiency class of at least IE3. Energy efficiency refers to rational use energy resources, with the help of which a reduction in energy consumption is achieved at the same level of load power. The main indicator of the energy efficiency of an electric motor is its coefficient of performance (COP):
IE1 standard energy efficiency class.
IE2 high energy efficiency class.
IE3 ultra-high energy efficiency class.
IE4 the highest energy efficiency class.

Obviously, the higher the efficiency (and, accordingly, the lower the losses), the less energy the electric motor consumes from the network to create the same power.
With an increase in energy efficiency, the service life of the motor also increases, since the source of heating of the motor is the losses released in it.
The main losses are divided into the following classes:
1. mechanical losses - ventilation losses, losses in bearings, losses due to friction of brushes on the collector or slip rings;
2. magnetic losses - losses due to hysteresis and eddy currents;
3. electrical losses - losses in the windings during the flow of current.
The service life of the insulation is halved for every 100°C increase in temperature. Thus, the service life of an energy efficient motor is longer, since the losses and therefore the heating of the energy efficient motor is less.

DAB circulation pumps

The installation of heating systems is a very acute problem for property owners. Not everyone understands that in order to maintain normal temperature indoors, not only a heating boiler and pipes with batteries are required, but also a number of rather complex instruments and devices, without which there will simply be no heat. One of these indispensable devices is circulation pump. And although it is better to entrust the selection and installation of this indispensable element of heating systems to specialists, home owners should also be guided in the topic. I must say that the correct selection of the pump is a guarantee that you will be able to avoid various failures during the operation of the heating system. In addition, such a unit will provide savings in electrical energy, it will also reduce noise in radiators and in the pipeline. And, of course, the circulation pump will increase the overall heat transfer of the system.

Centrifugal pumps DAB

The principle of operation of a surface centrifugal pump is well known and we will not dwell on it in detail: the impeller provides, with minimal hydraulic losses, the radial movement of the liquid in the direction from the center outward and also transfers the energy of the pumped liquid, ensuring the conversion of kinetic energy into head energy.
Surface centrifugal pumps can only pump water from shallow wells and wells - the water mirror should be at a depth of 5-7 m. To supply water from a greater depth, it is necessary to use a water intake system with an ejector - a Venturi tube.
Self-priming pumps have significant advantages over centrifugal ones due to the large pressure generated and are practically indifferent to the presence of air in the system.

Pumps with built-in ejector DAB

These are ordinary centrifugal self-priming pumps equipped with a special device at the feed - an ejector, due to which the effect of self-priming is achieved (being connected to the suction chamber, it creates a vacuum in it). The ejector allows you to create a high outlet pressure and slightly increase the suction depth. When using an ejector, a stream of water under pressure is supplied to the inlet of a conical nozzle, after which it enters a cavity connected to the suction line. Thus, two streams of water enter the cavity - the primary one supplied by a centrifugal pump and the secondary one coming from a well or a well. Both streams create pressure, equal to the sum developed by a centrifugal pump and fed to its input.
Thus, only a part of the total feed generated by the closed centrifugal impeller is sent to the discharge pipe - the rest is recirculated. At the first start, it is enough to fill the pump housing with water; there is no need to fill the suction pipe and remove air from it. At the moment of start-up, the water contained in the housing, circulating through the ejector, will move air from the suction chamber to the discharge chamber and further through the outlet pipeline. At the same time, the vacuum created in this way will lead to a rise in the water level in the suction pipe, thereby causing suction.
The constant functioning of the self-priming system makes such pumps practically insensitive to even a significant presence of air in the pumped liquid.

If the water intake level is below about 10 meters in relation to the pump, then pumps with an external ejector or multi-stage borehole pumps are used. And which one to choose?
The use of an external ejector significantly reduces the volumetric flow (performance) of the pump. average cost"pump + ejector" systems for wells and wells with a water table at a level of more than 20 m, is comparable to the cost of a submersible borehole pump, which makes the latter more preferable for use by the consumer.

Multisection pumps DAB

Borehole pumps with several impellers arranged in series are typical representatives of this class. If high outlet pressure is required, borehole pump is the best choice. In fact, these are several centrifugal pumps connected in series, because. a conventional centrifugal wheel produces a maximum pressure of only 2-3 atm. Therefore, in order to obtain higher head values, several centrifugal wheels installed in series are used.

Peripheral pumps DAB

A replacement for a self-priming pump can be a vortex pump, but its disadvantage is that this pump is very sensitive to the presence of impurities in the water and air locks in the water supply, as a result of which the pump can sometimes idle. The main advantage of this type of product is low price and high pressure.
How is a vortex pump different from a simple centrifugal pump?
In short: on the periphery of the impeller there is a large number of radial blades with a special profile.

The impeller of a vortex pump is a flat disk with short radial straight blades located on the periphery of the impeller. The housing has an annular cavity into which the wheel blades enter. Distinctive feature of the vortex pump lies in the fact that the same volume of fluid moving along a helical trajectory, in the area from the entrance to the annular cavity to the exit from it, repeatedly enters the interblade space of the impeller, where each time it receives additional energy and, consequently, pressure.

Pumps of this type provide uniform flow and high outlet pressure - 2-4 times more than centrifugal ones. This makes it possible to produce vortex pumps with significantly smaller dimensions and mass compared to centrifugal ones.
The advantage of vortex pumps is also the fact that they have a self-priming capacity, which eliminates the need to fill the casing and the suction line of the pump with the pumped liquid before each start-up.
The disadvantage of vortex pumps is the rapid wear of their parts when working with liquids containing suspended solids and a relatively low efficiency (0.25-0.5).

The specialists of the company "Termogorod" Moscow will help you choose the right one, buy as well as install a pump or a DAB pumping station, find an affordable solution. Ask any questions you are interested in, telephone consultation is absolutely free, or use the form "Feedback"
You will be satisfied cooperating with us!

In circulation pumping stations, as a rule, two groups of pumps are installed:

1) for supplying waste (heated) water to cooling facilities;

2) to supply chilled water to consumers.

CNS located near the facilities for cooling water, from where water is supplied by gravity lines to the receiving chambers of the station.

In order to ensure the reliability of the operation of the pumps, they are installed under the bay, so the central nervous system is arranged buried or semi-buried.

6.2.6. Capacity of pumping stations Supply by pumps 1 lift

There are two cases of pump operation:

1) water supply to treatment facilities;

2) water supply directly to the network.

1). When HC1 supplies water to treatment facilities, its work is calculated to supply the average hourly consumption per day with maximum water consumption(taking into account the water consumption for own needs of treatment facilities).

Station Average Hourly Feed

where - the maximum water consumption for the whole day, m 3;

- coefficient taking into account the water consumption for the own needs of treatment facilities ( = 1,04…1,1 );

T- the number of hours of operation of facilities for water treatment (as a rule, T = 24 h).

If there are no water treatment facilities in the FPV, for example, when using groundwater sources, and pumps supply water to the reservoir, then the total supply of pumps 1 rise is defined as

where is the coefficient taking into account the water consumption for the own needs of treatment facilities ( = 1,01…1,03 ).

2). Feed pumps 1 lifting, pumping water directly into the network, set equal to highest hourly consumption per day with maximum water consumption.

When servicing pumps circulating systems water supply pumps 1 rise is taken equal to the average hourly consumption of fresh (additional) water per day with maximum water consumption.

Feed pumps 2 lifts

Pumps 2 lifts supply water from reservoirs to the consumer's network, therefore their mode of operation, and, consequently, their quantity and productivity depend on the water consumption schedule.

Water consumption schedules are based on data from industrial enterprises.

Pumping stations 2 lifting can work in the mode of uniform or stepped feed. With a stepped supply, a different number of pumps operate at different hours of the day, depending on water consumption.

With uniform water consumption, pumps are selected with the expectation of a uniform supply of water, i.e. in this case, the flow (capacity) of the pump = 4.17% of daily water consumption. Since the required water flow is provided by pumps, there is no need for a water tower.

In the case of uneven water consumption, the graph may look like this:

Figure 6.1 - Graph of uneven water consumption

In the first shift, water consumption is 2.5%, in the second - 6%, in the third shift - 4% per hour.

When organizing the stepped operation of pumps in the first shift, a pump with a supply of 2.2% per hour can be selected. During the second shift, the same pump will work, and a pump with a supply of 4.25% is connected to it. The total supply by two pumps, taking into account their parallel operation, is 6.05%. On the third shift, the pump is turned off with a supply of 2.2%, and the pump continues to operate with a supply (capacity) of 4.25%.