Impulse tubes for pressure sensors 14x2. Optional equipment

Teplopribor group of companies (GC) (Teplopribor, Prompribor, Teplokontrol, etc.)- these are devices and automation for measuring, controlling and regulating the parameters of technological processes (flow metering, heat control, heat accounting, control of pressure, level, properties and concentration, etc.).

At the price of the manufacturer, products are shipped both of our own production and of our partners - leading factories - manufacturers of instrumentation and automation, control equipment, systems and equipment for controlling technological processes - process control systems (much is available in stock or can be manufactured and shipped as soon as possible) .

Looped Perkins tube

Perkins tube is a steel loop impulse tube, designed for installation, protection of the device and selection of pressure of non-aggressive liquids, gases and steam. Perkins tube (loop impulse tube) is used for guard instrumentation (pressure gauge, sensor) from intense heat- overheating (by cooling the measured medium in the siphon), as well as to dampen water hammer(due to the compensating siphon loop, damping the pulsations of the water hammer). Perkins impulse tubes (straight and angled siphon elbows) are the most economical option for protecting and connecting pressure measuring instruments on all types of pipelines.

Perkins impulse loop tube cost depends on the material, design, thread type, etc.,
for example, the price of the basic version (straight, Steel 20, bottom for welding) - from 295 rubles *

Main Specifications of Perkens Loop Impulse Tubes

Design version:
- direct(for mounting on a horizontal pipeline)
- angular(for mounting on a vertical pipeline)
angular without a shoulder, with a shoulder in the direction of the loop or away from the loop.

Rated working pressure:
for St.20 up to 250bar (25MPa),
for 12X18H10T (stainless steel) up to 40 MPa.

Maximum operating temperature up to 300C.

Diameter: Impulse tube 14x2mm, hinges usually 85mm (most common length 360mm).

Types of Perkins connection to the process / to the device:
- internal / external thread W-Z (nut / fitting)
- female / female thread W-W (nut / nut)
- for welding / thread (in / out)
Execution for welding is possible with reinforcement and without.

Thread type: pipe inch G1/2 or metric M20x1.5.

Material:
structural steel St.20 (painted or with anti-corrosion galvanized coating up to 200C), steel 09G2S or stainless steel 12X18H10T (up to 450C).

In the case when the temperature of the working medium exceeds 90 0 C, an impulse tube with a loop (siphon design) is used. Thanks to the use of a compensating loop, the devices are protected from pulsations of the measured medium, water hammer and overheating. Depending on the location of the pipeline, a straight or angular Perkins version is chosen.

Loop impulse (siphon) Perkins tubes are usually made of steels: St.20, 09G2S, 12X18H10T, 12X1MF, 10X17H13M2T. Options for connecting to the device: fitting / nut with various threads - M20x1.5; G1/2; NPT1/2; K1/2; R1/2 and others. Options for connection to the process: for welding, reinforcement for welding, fitting/nut with various threads — M20x1.5; G1/2; NPT1/2; K1/2; R1/2 and others.

The efficiency of using a siphon device to control steam pressure is ensured by the effect of condensation of cooled steam in the kinks of the siphon.

Additional Information

Selective pressure device- this is a mounting element with the help of which the connection of instrumentation and automation equipment to pipelines, gas ducts, air ducts, process equipment, communications, etc. is carried out.
The simplest pressure selection device is the assembly of a siphon impulse tube with a shut-off device (cock, valve or valve).

Auxiliary equipment and protective and mounting fittings for installation, proper operation and protection of pressure control devices (pressure gauges, vacuum gauges, pressure vacuum gauges, sensors-relays, converters, etc.).

Mounting and supply fittings for pressure gauges, vacuum gauges and combined pressure and vacuum gauges:
1. Mounting fittings: selective devices - OS: bosses (weld-in adapters), straight and angled bends (including Perkens loop tubes) or copper and steel impulse tubes (lines).
2. Pressure gauge valves (up to 16/25 bar) or valves/valve blocks (over 2.5 MPa), pressure and safety valves.
3. Gaskets / seals copper, fluoroplastic, paranitic, rubber, etc.
4. Adapters M20/12 - G1/2/G1/4 (external/internal thread), couplings, barrels (material steel, brass, stainless steel).
5. KMCH - a set of mounting parts (usually: mounting flange (rear or front), bracket, bracket, fasteners).
6. HRC - a set of connecting parts (usually: flanges, fittings, nuts-M20x1.5 / G1 / 2, nipples (steel, stainless steel), fasteners, seals).

Protective separation devices:
1. Protective devices: dampers (absorbers of water hammer pulsations, yuza), coolers (radiators), membrane separators RM, capillary lines and connecting sleeves mod-55004.
2. Protective covers. Installation in special insulating fireproof moisture-proof cabinets and covers, the use of special heaters.

Spare Parts and Accessories - Spare Parts:
1. Indicator of working pressure (arrow-yabednik).
2. Liquids for filling the system "Device-Separator Membrane - Connecting Sleeve", the type of liquid is selected depending on the temperature and the type of controlled environment (for example, for food production, etc.)..
3. Spare parts and accessories - spare parts and accessories (mechanisms, arrows, dial / scales, etc.).

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Official website of Teplopribor Group of Companies - production and sale of instrumentation and automation: Pressure control devices (pressure transducers (sensors), relays, pressure gauges, differential pressure gauges, pressure gauges), additional equipment and mounting and shut-off valves for them (selective devices, impulse tubes (lines), taps / valves, etc.). See technical description/characteristics, price list (wholesale price), catalogue, order form (how to choose, order and buy) selected devices, etc. Perkens at the manufacturer's price, check the availability in a warehouse in Moscow or the production time. Delivery / shipment of shopping malls (Business Lines and others) throughout the territory of the Russian Federation.

Price: from 295 rubles.

Availability in stock: In stock*

* At the warehouse in Moscow, loop (siphon) Perkins impulse tubes (straight or angled) are available only in the standard (basic) version; in the absence of special designs, the planned production time will be 10-15 working days, or inexpensive analogues available in stock can be offered.

All prices for loop (siphon) Perkins impulse tubes (straight or angled) are indicated in rubles (see the general price list) excluding tax (VAT = 18%), additional cost. options and equipment, packaging, shipping and / or delivery costs, based on a wholesale order (for large wholesale lots and for project orders, the price is formed individually, based on the size of the lot, the agreements reached and the address of the object).

ATTENTION! Be careful when choosing a supplier - on the Russian market of shut-off and control valves and selective pressure devices, there are cheap low-quality Perkins loop impulse tubes: analogues, fakes and illiquid assets, devoid of proper service, guarantees; therefore, perhaps even having a lower price than original products.

The impulse tube is used for pressure relief, connecting impulse lines to flow and pressure regulators. In addition, it is another low-cost solution for high media temperatures. Each meter of impulse tube lowers the temperature of the medium by about 80 degrees. Usually steel or copper impulse tubes are used. One end of the impulse tube, connected to the pressure source, has the most convenient thread for mounting G1/2, and the other end, connected to the transmitter or regulator, has a thread that matches the thread of the equipment.

For example: for ease of installation of pressure sensors, AQUA-KIP offers a pressure supply pipe (copper) with threaded internal and external connections of any length for pressure supply. The copper tube withstands pressures up to 87 bar and at the same time easily bends, which makes it possible to lay it in place from the pressure tap to the device without much effort and additional tools.

Characteristics:

Copper tube: 10x1

Pressure (max): 87 bar (30 bar for threaded fittings)

Temperature: -25+210 С

Process and device connection thread: G1/2, G1/4, G3/8 (please specify internal or external on request)

The price is for impulse tube 1 meter long and with G1/2 thread.

Length: 1 meter

Auxiliary fittings for pressure measuring instruments include such a device as a Perkins tube, otherwise called an impulse tube for a pressure gauge or a loop tube. It is designed to reliably protect the device from possible fluctuations in the measurement environment and from excessive heating. With the help of a tube, the temperature at the point of contact of the device with the system decreases. In addition, the tube serves as an adapter from the pressure gauge to the pipeline.

Condensate accumulates in the cavity of the impulse tube, preventing the measured high-temperature medium from entering the middle of the pressure gauge. When putting the line into operation, it is necessary to make sure that there is coolant in the steel tube.

The Perkins loop tube is used when measuring liquids and gaseous substances that are not strong reagents. In this capacity and as an intermediary between devices and pipelines, the impulse tube is the most cost-effective connection option. The operation of such a tube can extend the life of the measuring instrument for many years. The best way to connect this type of fitting to the pipeline system is the use of a threaded connection. In some cases, the connection is carried out by welding. Impulse tubes are made from various grades of stainless steel. If it becomes necessary to install pressure sensors, then Perkins copper tubes are used for their installation.

The impulse tube, which has an angled design, is used to install a measuring device on it and connect it to impulse systems. Sometimes these tubes are made of brass. Straight loop tubes are used in the same cases. The general purpose of this accessory is to dampen oscillations and pulsations in the medium being measured and to prevent the pressure gauge from heating up.

On the pages of the Soyuzpribor LLC online store you will find pressure sampling devices, connecting sleeves, various adapters for pressure gauges, frames, dampers, bosses and other types of additional equipment.

To create normal temperature conditions, the diaphragm seal must be connected to the measuring device either through a connecting sleeve or through a supply pipe, which is installed by the consumer between the pressure tap and the separator.

Pneumatic measuring pressure transducers GSP are always connected to the separator by means of a sleeve.

Displacement is allowed when mounting a separator with a connecting sleeve in height, while taking into account the installation error of the measuring device with an upper measurement limit of up to 1 MPa, determined by the hydraulic pressure of the separation liquid column in the connecting sleeve.

The standard connecting sleeve, model 55004, has a length of 2.5 meters when unfolded.

The damping device is resistant to ambient temperature from minus 55 to plus 70 °C, at relative humidity from 30 to 80% over the entire temperature range, and is also resistant to relative humidity of 95% at 35 °C (for U version) and relative humidity up to 100% at a temperature of 35 °C (for version T).

Valve blocks BK are intended for connection to the lines with the measured medium of devices for measuring excess and vacuum pressure. Blocks allow you to cut off devices from the lines without depressurizing the medium being measured, check the zero value of the readings of the devices or purge the impulse lines. For oxygen pressure measurement lines, the parts in contact with the measured medium are degreased and the designation “K” is put.

Coupling and adapter for pressure gauges or thermometers are connecting (connecting) fittings used in systems (pipelines) for transporting gaseous media and liquids of low viscosity and non-crystallizing character. In essence, these products are additional (auxiliary) equipment.

The Perkins tube (impulse tube) is designed to cool the measured medium when it is fed into the measuring device (pressure gauge, pressure sensor). Due to the use of a compensating loop, a gas cushion remains in the tube, and water hammer is protected. Removing measuring instruments from pipelines with hot medium allows them to be protected from heating.

* It is possible to manufacture Perkins tubes of other sizes, as well as with connections according to your drawings.

The control and measuring equipment used on pipelines and various technological devices imposes strict requirements on the parameters of the working environment. Excessively high temperature, vibrations, pressure pulsations are unacceptable. Perkins tube, connecting the liquid or gas line with the control device, allows you to reduce the parameters of the working environment for manometers to acceptable values.

The product has the shape of a loop - condensate appears in it, the high-temperature working medium does not pass to the measuring equipment. The device is effective when working with chemically non-aggressive liquids and gases. Before operation, the Perkins tube is filled with cold liquid. Some models of Perkins tubes are supplemented with a shut-off valve, connecting nodes.

The material of manufacture is steel of various grades, the operating temperature limit is 300 degrees, thread options are M20x1.5, G1 / 2. The choice of thread is carried out according to the parameters of the connecting element of the pipeline and the measuring device. The main feature of the installation is the need to eliminate or minimize the sections of the horizontal location of the tube - some slope towards the measuring device is recommended.