Where is the ejector for the surface pump installed. Domestic water pump

In almost any locality, a private house or cottage can be equipped with autonomous water supply from a well or well. As a rule, a pump is used to pump water. If the depth of the aquifer is less than 7 meters, then there will be no problems with the choice of the pump. You can choose any unit of suitable power and performance. However, such products will not be able to lift water from deeper hydraulic structures. To lift water from a great depth, it is necessary to use an ejector for a pumping station.

To understand what a pump ejector is for, imagine that we will improve a conventional submersible pump with our own hands to lift water from a great depth. Certain restrictions for the operation of a conventional pumping station will be created by water pressure, atmospheric pressure and the strength of the structural parts of the pump. During the rework, a conventional submersible pump will become much heavier, its dimensions will increase. As a result, such a unit will become simply difficult to operate. In addition, the amount of electricity consumed will increase significantly.

To avoid such problems, it is necessary with the help of additional parts to facilitate the pumping of water to a considerable height. It is the ejector that pushes the water towards the surface and facilitates its rise. This is a fairly simple device that you can install yourself.

Principle of operation

To understand what an ejector is and to find out its principle of operation, it is necessary to study the purpose of the main components of the device. It consists of the following structural parts:

• A tube with a narrow end, called a nozzle. Water flowing through the nozzle acquires a large acceleration and exits this device at high speed. What is it for? The thing is that the flow of water at high speed does not exert so much pressure on the surrounding planes.
• mixing device. Water from the nozzle enters this device. Here, a significant discharge of the entire volume of liquid occurs.
• suction tank. Under the influence of vacuum in the mixer, water from the well begins to flow into the suction chamber. After that, the mixed fluid flow enters the next element - the diffuser.
• diffuser. From this part of the structure, the liquid moves further along the pipeline.

The ejector can be installed by hand. It is mounted in a pipeline laid from the well to the pumping device. The principle of operation of the unit is such that part of the liquid raised to the surface falls back into the hydraulic structure to the ejector. Thus, a recirculation line is formed. In the course of such work, water escapes from the nozzle with a powerful speed and takes away part of the liquid from the well, creating additional vacuum in the pipes. Thanks to this principle of operation, pumping equipment spends much less power on lifting water from great depths.

To regulate the volume of liquid returning back to the system, a special valve is installed on the recirculation line. Thanks to him, you can regulate the efficiency of the entire system.

It is important to know: part of the water that is not used in the recycling system goes to the consumer. It is by these volumes that the productivity of pumping equipment is judged.

Advantages of ejector type pumps:

• there is no need to choose a unit with a powerful engine;
• the pumping part will not be so massive;
• this will ensure less electricity consumption and long-term operation of pumping equipment;
• thanks to the ejector, the start-up of all pumping equipment is facilitated, since a small amount of water creates a sufficient vacuum in the pipes.

Features and types of design

The ejector type pump is of two types:

• with an external location of the ejector;
• with an internal (built-in) location of the ejector.

The choice of one or another type of ejector layout is determined by the requirements that apply to pumping equipment. To suck air from different containers, another type of such units is used - an air ejector. It has a slightly different principle of operation. In our article, we will study devices for facilitating the pumping of water.

Internal ejector

Pumping equipment with a built-in ejector has a more compact size. In addition, the creation of fluid pressure and its intake for recirculation occurs inside the pumping equipment. This pump uses a more powerful motor that can recirculate the liquid.

The advantages of such a constructive solution:

• the unit is not sensitive to heavy impurities in the water (silt and sand);
• the water entering the equipment does not need to be filtered;
• the device is suitable for lifting water from a depth of not more than 8 m;
• such pumping equipment provides sufficient liquid pressure for domestic needs.

Among the shortcomings, it is worth noting the following:

• this pump makes a lot of noise during operation;
• for the installation of such a unit, it is better to choose a place away from home and build a special room.

External ejector

To perform an outdoor installation of an ejector near the pumping equipment, it is necessary to equip a tank into which it is worth drawing water. In this tank, a working pressure and the necessary vacuum will be created to facilitate the operation of pumping equipment. The ejector device itself is connected to that part of the pipeline that is immersed in the well. In this regard, there are restrictions on the diameter of the pipeline.

Advantages of a remote ejector:

• thanks to this design, it is possible to raise water from a considerable depth (up to 50 m);
• it is possible to reduce the noise from the operation of pumping equipment;
• such a design can be placed right in the basement of the house;
• without reducing the efficiency of the pumping station, the ejector can be placed at a distance of 20-40 m from the well;
• By having all the necessary equipment in one place, it is easier to carry out repair and commissioning, which contributes to a longer service life of the entire system.

Disadvantages of the external location of the ejector device:

• system performance is reduced by 30-35 percent;
• restrictions in the choice of pipeline diameter.

How to connect?

As a rule, the installation of pumping equipment with a built-in ejector is no different from the traditional installation of a conventional pump. To do this, it is enough to connect the inlet pipe of the pump to the pipeline coming from the well. A pressure line is also being equipped, a hydraulic accumulator and the necessary automation are being installed.

In systems with an external location of the ejector, the equipment is connected in the following sequence:

1. To ensure recirculation, it is necessary to lay an additional pipeline from the inlet pipe of the ejector device to the pressure line of the pumping equipment.
2. A branch pipe with a check valve is connected to the inlet of the ejector, on which a coarse filter is installed for pumping fluid from the hydraulic structure.

If required, a control valve is installed in the recirculation pipeline. Such an additional device is simply necessary for wells in which the water level is above the calculated liquid level for pumping equipment. Thanks to this valve, it is possible to reduce the pressure in the ejector and cause a rise in pressure in the water supply system. Some models are equipped with a built-in control valve.

Worth knowing: usually the method of adjustment and the location of the valve are specified in the instructions attached to the unit.

Deep aquifer is a common problem that is well known to many land owners. Conventional surface pumping equipment either cannot provide the house with water at all, or delivers it to the system too slowly and with low pressure.

This issue needs to be resolved as soon as possible. Agree, buying a new pump is a costly and not always financially justified undertaking. The solution to this situation can be an ejector for a water supply pumping station.

We will show you how to choose the right unit and install it without the help of specialists. And also we will give a step-by-step instruction on the manufacture and connection of a home-made ejector. All stages of work are accompanied by visual photographs.

The deeper the water is, the more difficult it is to raise it to the surface. In practice, if the depth of the well is more than seven meters, it is difficult to cope with its tasks.

Of course, for very deep wells, it is more appropriate to purchase a high-performance submersible pump. But with the help of an ejector, it is possible to improve the characteristics of a surface pump to an acceptable level and at a much lower cost.

The ejector is a small device, but very effective. This assembly has a relatively simple design, it can even be made independently from improvised materials. The principle of operation is based on giving the water flow an additional acceleration, which will increase the amount of water coming from the source per unit of time.

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A pumping station with an ejector is part of an autonomous water supply system. The principle of operation of the ejector is that it regulates in the pipe. In this case, water moves from the well to the surface - to the consumer.

To solve the problem of low water pressure allows the installation of an ejector for a pumping station

All structural elements are responsible for the energy efficiency of such a station. At the same time, water supply from a depth of 10 m or more is provided only by an ejector pump. Without this device, the station pumps water only from a well, the depth of which is a maximum of 7 m.

This article talks about both the types and design of the ejector, and how to create an ejector pump.

Types and typical varieties of the ejector pump

• - a vacuum pumping apparatus that pumps gas out of an enclosed space and maintains a vacuum. Such a device is used in technical devices that provide water supply to consumers;
• steam jet - which uses the steam energy of the jet when pumping water, vapor or gas from an enclosed space. This device was used on river and sea vessels when pumping water.

At the same time, the built-in pumping station produces a lot of noise, and the external ejector is quiet.

All advantages and disadvantages directly affect the choice.

External ejector pumping stations are installed on a well located at a great depth. They are connected with high power, which is installed indoors.

Internal pumping stations are connected to less powerful motors that are installed outside the house - where there is a shallow well (well).

Features and principle of operation of the installation

At the plants for the production of equipment for water disposal, 2 types of pumping equipment are manufactured - with an internal and external ejector pump.

Devices with an internal ejection device pump out water from shallow (8 m or less) wells, reservoirs and wells.

A feature of such equipment is the presence of the "self-priming" function, as a result of which the water level is regulated, which is below the level of the inlet pipe. In this regard, before turning on the device, it is necessary to fill it with water.

Device scheme: 1- tee; 2 - fitting; 3 - vinyl chloride tube; 4 - adapter for a metal-plastic pipe; 5 - angle NhMP; 6 - angle HxB; 7 - angle NhMP

After the device is filled with water and turned on, the impeller of the installation with an internal ejector pump sends water to the ejector inlet, thus forming the necessary jet. It moves along a thin tube and the water pressure becomes faster.

When the pipe is connected to the inlet, water begins to flow to the station.

The water then enters the chamber, which sucks in the liquid. In this case, the water pressure becomes less and the liquid flows through the diffuser to the outlet, slightly increasing the flow rate.

A device that uses an external ejector for a pumping station differs from an internal ejector pump in that it is used only at a depth of 10 m or more.

It is also difficult to install external ejector pumps on these devices. The pipes that connect the pumping devices to each other are installed only in a vertical position. Otherwise, a lot of air will enter the inlet line and it will stop working normally.

The best option for using devices with a remote ejector is the installation of the device at a depth of 20 m. With an increase in the lifting height, its performance decreases.

As a result, the external pumping device has a lower efficiency than the internal one.

Self-made ejector

In order to make an air ejector with your own hands, you need to purchase the following set of parts, consisting of fittings and interface elements:

1. tee - the basis of the designed air ejector;
2. fitting - a conductor of high water pressure in the device;
3. couplings and bends - these elements are used for self-assembly of the ejector apparatus.

Scheme of connecting the ejector to the line of operation of the pumping station

In order to assemble an ejector for a pumping station from parts with your own hands, you must perform the following steps:

• first, you should take a tee, the ends of which are used for threaded installation. In this case, the thread on its ends must be internal;
• further, a fitting should be installed on the bottom of the tee. In this case, the fitting should be attached to the tee in such a way that the small pipe is inside the pumping unit. In this case, the branch pipe should not appear on the end, which is located on the opposite side of the tee.

If the pipe turned out to be too long, then it must be shortened - turned.

In the same way, a short fitting is increased by using a polymer tube. The distance between the ends of the tee and the fitting should be 2-3 mm .;

• then, on top of the tee - above the fitting, an adapter should be installed. Moreover, 1 end of the adapter must be made for external threading (it must be installed on the base of the pumping apparatus), and the second must be installed as a crimp outlet (fitting) for a metal-plastic pipeline through which water flows from the well;
• from the bottom of the tee with an installed fitting, a 2nd crimp outlet is installed, on which it is necessary to put on and fasten the recirculation line pipeline with nuts. In this regard, before installing the device, you must first grind up to 3-4 threads of the thread on the lower part of the fitting;
• upon completion of the assembly of a home-made pumping apparatus, a second corner should be screwed into the branch on the side, at the end of which a collet clamp is installed for installing a water pipe.

The threaded connection is made on seals made of polymers - fluoroplastic sealing material (FUM).

After completing the assembly of a homemade ejector pump, it is connected to the station itself.

If you install a homemade ejector outside the well, then you will end up with a station with a built-in ejection device.

If the ejector device is installed in a shaft in which it is covered with water, then a station with an external ejection device will be obtained.

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When installing such a home-made device, 3 pipes should be connected to the tee at the same time:

• 1st - to the end, which is located on the side of the tee. The pipe is lowered to the bottom, and a filter with a mesh is installed at its end. A small pressure of water begins to flow through such a pipe;
• 2nd - to the end, which is located at the bottom of the tee. It is connected to the pressure line that exits the station. As a result, the water flow rate in the ejector pump begins to increase;
• 3rd - to the end, which is located on top of the tee. It is brought to the surface and connected to a pipe that sucks in water. Through such a pipe, water will flow with even greater pressure.

As a result, the first pipe will be under water, and the second and third - on the surface of the aqueous liquid.

The price of an ejector for a pumping station ranges from 16-18,000 rubles. and depends on its specifications.

Pumping stations are in high demand among the population when arranging individual water supply due to their versatility and reasonable cost, their only serious drawback is the small depth of water intake, not exceeding 9 meters. For this problem, there is a simple engineering solution based on the physical Bernoulli's law - an ejector for a pumping station, with a similar device, a surface electric pump is capable of sucking water from deep sources at a distance of a water mirror from the earth's surface of tens of meters.

This device, when used with a surface pump, is useful in cases where the water level of the source with which the surface pump previously worked has fallen for some reason (silting of the well and well, intensive water intake).

At the same time, it should be understood that the price of obtaining a high suction depth is the low efficiency of the electric pump, because part of the raised water is sent back to the suction pipe to increase the kinetic energy of the inlet flow. This factor hinders the use of surface ejector electric pumps for lifting water from great depths - for these purposes, wells are drilled and submersible pumps are used, the head of which in a domestic version can reach up to 200 m.

Rice. 1 The device and appearance of the ejector for the water station

An ejector is a device in which two media are connected in a mixing chamber, while one of them moves at high speed and is fed through a narrowed nozzle, and the second fills the chamber naturally. The flow leaving the nozzle with acceleration transfers its kinetic energy to the moving medium, which is then carried away from the suction point. Also, a reduced pressure is created in the zone at the exit of the narrow section of the nozzle - this leads to the fact that the transported medium is simultaneously sucked in by the ejector.

The moving and accelerating medium can have a different physical state; in jet pumps, air or steam is supplied through a narrow nozzle, which heats the water flow and pushes it out at high speed.

Rice. 2 Ejector design

What is an ejector and why is it needed

The design of the ejector is not very complex, its main elements are:

• Nozzle. It is a cylindrical branch pipe with a conical narrowing at the end. According to Bernoulli's law, as the cross section of the pipeline decreases, the pressure in it becomes lower, and the speed of the passing flow increases. Thus, there is a movement of the transported flow with high pressure into the low pressure area (suction) and at the same time it is pushed out by a jet of water, moving at high speed (transfer of kinetic energy).
• suction pipe. Through this element of the ejector, the transported liquid enters it, usually its diameter exceeds the size of the inlet pipe of the nozzle.
• Mixing chamber. In this node, two flows collide, while the kinetic energy from the auxiliary is transferred to the main one.
• Neck. After mixing the two streams, the liquid enters the narrowed part, where its speed increases.
• Diffuser. The element has a cone-shaped expansion at the end, as a result of which the pressure of the liquid at the outlet increases, and the flow rate decreases. The cross section of the diffuser is designed for connection to a pressure pipeline of standard diameter.

Rice. 3 Centrifugal pump - interior

The use of an ejector in domestic pumping stations is justified only in exceptional cases - when it is used, depending on the depth of immersion of the suction pipe, the efficiency drops by 50 - 70%, which leads to unjustified waste of electricity. Therefore, to draw water from great depths, everyone uses submersible electric pumps and drills special wells for them. This is also more efficient because the efficiency of submersible pumps is higher than that of surface pumps, which spend part of their energy on suction and lifting the water column to the impeller (65% to 50% ratio).

On the pumping equipment market, there are still surface centrifugal electric pumps with built-in or remote ejectors, and in order to answer the question of why an ejector is needed in a pumping station, you should consider options for its use:

• Dry summer or long periods of rainless weather. In this case, the static water level in the well or well decreases, and at a mark of more than 9 m from the surface, a conventional centrifugal surface pump will not be able to raise it. In this situation, you can connect an external ejector and use the source for some time with a loss of performance until the static level rises.
• If there is a one-time intensive water intake. The situation may arise if a shallow source has a low flow rate (replenishment rate), but it is necessary to raise a large volume of water, for example, for a bath, filling containers for irrigation and other household needs in a private house, leading to a drop in level.
• Operational lowering of the water mirror in the source. Any well on sand has a short service life and silts up over time, the same problem occurs with wells, so the static water level in them drops. Installing an ejector will allow you to raise water from depths of more than 9 meters before cleaning the source or solving problems by other methods.

Rice. 4 Ejector pumping stations

What are the pumping stations

The pumping station is a structure assembled into a monoblock, the main part of which is a centrifugal electric pump located above the hydraulic accumulator tank, its mandatory elements are a pressure switch and a pressure gauge fixed on a five-inlet fitting.

The principle of operation of a centrifugal electric pump is to supply the suction liquid to the center of the impeller with blades, which, when rotated, due to centrifugal force, push it out through the side outlet pipe.

A standard centrifugal pump has an inlet in the center of the hydraulic compartment and an outlet located perpendicular to its axis in the side, but there are pumps with a different design.

Rice. 5 Built-in ejector - diagram

Stations with built-in ejector

Pumping stations with a built-in ejector incorporate a centrifugal electric pump, in the hydraulic part of which an ejector unit is located. The principle of operation of such a system is quite simple - the suction water enters the centrifugal impeller, which throws it out through the side pipe. At the same time, part of the liquid, to which the rotation of the wheel has given kinetic energy, is directed through the ejector channel to the nozzle and is pushed out of it under pressure. The stream accelerated due to the narrowed part of the nozzle mixes with the transported one, transferring its energy to it, and at the same time drawing it in due to the reduced pressure at the outlet. Thus, a significant increase in the immersion depth of the suction pipe is achieved, which in some models reaches 50 meters.

A distinctive feature of such pumps is the inlet, displaced relative to the central axis (in conventional centrifugal electric pumps, such an arrangement is also not uncommon), such units are very rare in the composition of pumping stations due to the above reasons (low efficiency).

Rice. 6 Electric pump device with built-in ejector

Remote ejector stations

A pumping station with a remote ejector has a significant advantage over equipment with a built-in ejector unit - it can operate in normal mode, we raise water from a depth of no more than 9 meters, and if necessary, you can always connect a device to increase the suction depth.

To do this, in the hydraulic part of the body there are two holes of different diameters with standard sizes of 1 1/2 and 1 inch, a pressure pipe is connected to the larger one, and a recirculation pipe is connected to the second one, supplying water to the ejector nozzle. The ejector assembly itself is placed in a water intake source along with pipelines. Since without supplying liquid to the ejector, it will not rise from a great depth, the entire system is filled with water before starting work.

In appearance, electric pumps with a remote ejector differ from standard models by the presence of two adjacent holes in the hydraulic compartment of the housing. A pumping station with an external ejector is produced by many domestic and foreign manufacturers, the Marina model from the Italian company Speroni is the most famous, and other Italians are also often found on the market: Aquatica, Quattro Elementi, domestic Unipump.

Rice. 7 Remote ejector station and its connection

How to make an ejector yourself

When a standard pumping station stopped sucking water during operation due to a lowering of the water table, it can be lowered by digging a hole of the required depth in the ground - there are no other ways to increase the suction depth. It is pointless to make a home-made ejector according to any drawings, to purchase and install it - the part cannot be connected to a housing in which there is one inlet for the pressure pipeline instead of the two required for the operation of the ejector assembly.

If an ejector pumping station was purchased, and the unit was lost or broken, you can make an ejector with your own hands from plumbing fittings and fittings.

A similar design scheme is shown in Fig. 8, its main components are:

• Tee(one). The part serves to connect the inlet pipes for two water flows and at the same time is a chamber in which they are mixed with the transfer of kinetic energy to the transported one. At the outlet of the tee, instead of a diffuser, an adapter is installed to connect the pressure pipeline.
• Union(2). The part replaces the nozzle in the standard model and is designed to accelerate the recirculating water flow. When installing it, the length of the fitting is chosen so that the flow coming out of it is on the central axis of the transported one.
• corners(6, 7). Necessary for connecting the recirculation pipeline and placing the ejector in a vertical position, the angle 7 has a small inner diameter due to the fact that the return flow is always fed into the ejector through a pipeline of a smaller cross section than the pressure one.
• Injection(5). Water from the source enters the ejector through this part, the nut at the end is for attaching the water filter.
• Adapter(4). The part is necessary to connect the pressure pipeline entering the pumping station.

Before assembly, grind the hexagonal part of the fitting to a cone-shaped state, shorten it to the desired length or lengthen it with a piece of vinyl chloride tube. After that, the entire structure is assembled, first screwing in the fitting, and then the rest of the parts with sealing the threaded connections with flax, plumbing thread, FUM tape.

Rice. 8 Homemade ejector

Water pumping stations for individual water supply with a built-in or remote ejector to increase the suction depth are rarely used in everyday life due to a very low efficiency of about 15%. The purchase of such devices is advisable in cases where the level of the water table is likely to temporarily drop below the maximum allowable mark of 9 m due to various circumstances - large volumes of water intake, drought, frequent siltation of the source with a decrease in water level.

Video

The principle of operation of the ejector

Aurora ejector pumping station, description

Ejector - what is it and how does it work? The exact answer to this question is known to any hydraulic engineer who understands the essence of the transformation of the energy of the mixed jet into pressure in the pipeline. For those who are uninitiated in the subtleties of engineering, it is enough for consumers of water from a well to understand the fact that this node of pressure equipment allows the pump to pump water from depths of more than 15-20 meters. But if you want to assemble an ejector with your own hands, improving your pump, then you will need an understanding of the essence of this device, in fact, at an engineering level. And this article will help you figure out what an ejector is, how it works and how to assemble such a unit on your own.

What is an ejector and how does it work?

From the point of view of the physics of the process, an ejector is a typical ejector that builds pressure in a pipeline channel. It works in tandem with a suction pump that takes water from a well or well.

The essence of the operation of this unit is to throw into the pipeline or the working chamber of the pump a jet of liquid, accelerated to high speed. Moreover, acceleration is carried out by passing through a smoothly tapering section. Due to the difference in the velocities of the main flow and the mixed jet, a rarefaction area is created in the assembly chamber, which increases the suction force in the pipeline.

The air ejector, the ejector of the liquid medium, and the gas-liquid unit work according to this principle. In physics, the mechanics of the operation of such nodes is described by Bernoulli's law, formulated in the 18th century. However, the first working ejector was assembled only in the 19th century, more precisely in 1858.

Ejector pump - principle of operation and expected benefits

Modern ejectors accelerate the pressure in the pipeline, consuming about 12 percent of the volume of the pumped flow. That is, if 1000 liters per hour goes through the pipe, then for the efficient operation of the ejector, an emission of 120 liters per hour will be required.

The following principle of operation of the ejector is supported in the pump:

• A branch is cut into the pipe behind the pump.
• Water from this outlet is supplied to the circulation pipe of the ejector.
• The suction pipe of the ejector is connected to a pipe lowered into the well, and the pressure pipe is connected to the inlet to the working chamber of the pump.
• A check valve must be mounted on the pipe lowered into the well, blocking the movement of water down.
• The flow supplied to the circulation pipe moves at high speed, creating a vacuum in the suction zone of the ejector. Under the action of this rarefaction, the suction force (lifting water) and the pressure in the pipeline connected to the pump increase.

Equipped with an ejector, the pump begins to take water from a well with a depth of more than 7-8 meters. Without an ejector, this process is impossible in principle. A suction-type unit deprived of this unit is capable of lifting water only to a depth of 5-7 meters. And the ejector pump pumps water even from a depth of 45 meters. At the same time, the efficiency of such pressure equipment depends on the types of ejectors used.

Varieties of ejectors - classification by location

The ejector, the principle of operation of which we described above, is mounted only on surface pumps. And there are two installation schemes:

• Internal placement is when the ejector is built into the pump casing or somewhere nearby.
• External placement - in this case, the ejector is mounted in a well, where, in addition to the main pipeline, a circulation branch is also carried out.

The internal ejector for the pump gives a 100% guarantee for the safe operation of the ejector. In this case, it is protected from silting and mechanical damage. In addition, internal installation reduces the length of the circulation pipe. The biggest drawback of this scheme is a slight increase in suction depth. The internal ejector - what it is, and what benefits it provides, we have already explained above - allows the surface pump to pump water only from a depth of 9-10 meters. You can’t even dream of any 15-40 meters here. And you will be haunted by the noise of the beating of water, distributed by the body of the built-in equipment.

The external ejector promises such benefits as virtually silent operation (the source of the beat is located in the well) and the generation of a significant vacuum, sufficient to lift water from a well up to 45 meters deep. The unfortunate shortcomings of this scheme include, firstly, a drop in the efficiency of pressure equipment by about a third, and secondly, the need to install primary filters that regulate the flow frequency (such a unit is afraid of silting).

However, if you are going to design an ejector with your own hands, then the external node will be the most affordable option. That is what we will consider below.

Self-manufacturing: step by step instructions

If you decide to make an ejector with your own hands, you will not need drawings, since a simplified model of the external assembly can be assembled from standard tees, fittings and fittings and corners for plumbing. Moreover, only two adjustable wrenches can be used as working tools, and only FUM tape is useful to you from consumables.

A complete list of parts for a homemade ejector is as follows:

• Union with external thread and a brush for mounting hoses. It will play the role of a nozzle from which a high-speed stream of water is ejected.
• A tee with an internal thread, the diameter of which must match the external thread of the fitting. This element will be used as the body.
• Three corners with threaded and collet ends. With their help, you can streamline the laying of circulation, suction and pressure pipelines.
• Two or three push-in or compression fittings used to connect pipelines. Moreover, the latter option requires the use of an additional tool - a crimp key.

The assembly process itself begins with the preparation of the fitting. A hexagon protruding above the threaded end is grinded off from it. Next, the processed fitting is screwed into the tee from the side of the through channel, obtaining the basis for the circulation pipe. In this case, the end with a brush (fitting) should not go beyond the boundaries of the tee. If this happens, then it will have to be cut down.

To complete the installation of the circulation pipe in the tee, after the fitting, screw the corner with threaded ends, after which another corner is screwed onto the free part of this element, obtaining a U-shaped loop with a fitting ending. It is to this fitting that the circulation pipe from the pump will be attached.

The next step is to prepare the pressure end. To do this, a fitting with an external threaded end and a collet is screwed into the free through end of the tee (it is located above the equipped circulation outlet). A pipe from the ejector to the pump will be attached to this collet.

The last stage is the arrangement of the suction end. In this case, we simply screw an angle fitting with an external thread and a collet clamp on the other end into the side branch of the tee. Moreover, the collet should look down, towards the circulation pipe. And a suction pipe laid to the bottom of the well will be attached to this fitting.

Secrets of success - how to increase the efficiency of a homemade design

Firstly, the diameter of the circulation pipe must be two times smaller than the dimensions of the pressure and suction lines. Thanks to this, the flow will receive a high speed even on the way to the fitting that replaced the nozzle.

Secondly, it is better not to lower the suction pipe to the very bottom of the well - it should be located at least a meter away. And even better - at a distance of 1.5 meters from the bottom. This way you can avoid silting.

Thirdly, a non-return valve must be screwed onto the end of the suction pipe, which cuts off the flow of water down, and it will be useful to put a coarse strainer behind the valve. This increases the efficiency of ejectors and reduces the risk of siltation of the structure.