Gate valves. Wafer flange gate valve Complete set and key operating features

In any systems, the design of which is transferred directly to the pipeline, it is transferred so that the working medium is transported in one direction. In order not to come into direct contact with the change, which could cause the entire system to go out of order, various technical devices will be stuck, one of which is the wafer check valve. They are equipped with pipelines used by petroleum refining and chemical industries that transport rare and gas-like working media.

Wafer flange gate valve - "flap" made of stainless steel for operation in various water media

Design features and characteristics

The wafer valve, like all check valves, is twisted in order to block the flow of gas or rare medium, if it collapses in the wrong direction. In other words, this is a kind of locking device. Wafer-type gate valves, in addition to many others, can be installed in either a horizontal or vertical position. Depending on the characteristics of its design, stench may be:

1. spring;
2. pneumatic, made of stainless steel;
3. double-barrel couplings, made from chavun;
4. rotary type, made of stainless steel.

The installation process for wafer valves of all categories is the same and does not require special folding parts.

Among the advantages, which include check valves, which are of the wafer type, due to their compact dimensions, which makes it possible to install them in adjacent drains, so that other valve valves can become stuck and we can’t. However, the number of such compact valves can be changed based on other parameters of the system that is being installed, which is relevant in certain situations.

There are a number of widest modifications of wafer check valves, the skin of which is subject to new technical characteristics. So, when we talk about models of such devices, we can see the following in the middle:

• 19С53НЗ – devices that are characterized by ease of operation and maintenance;
• 16CH42R – wafer-type gate valves, which are made from especially high-grade materials;
• RU16 - models that are characterized by high reliability of the connection made with them.

Main varieties

If you want to look at the most popular gate type valves, then start with the rotary models, looking at the DN150 wafer valve. DU150, like other models, passes the flow of the working fluid through itself only in one direction. If the flow of the working medium changes directly, the valve is automatically blocked as the shutter closes.

The middle of the gate valves, which are located in the rotary class, shows:

• sorry;
• not naked.

The locking element of rotary type check valves is a spool, which allows them to be adjusted when working with a heavily clogged working core. In addition, the design features of such valve devices allow them to be installed for pipelines of a significant diameter (from fifty to one hundred and fifty millimeters).

Rotary gate valves, structural elements made of brass, are used for equipping scorching systems and water-heat supply systems. The design of such valves, which work very well with a rare working medium, includes a mesh that functions as a filter element.

Rotary gate valves can be installed in up to one of three types:

• muffovim;
• flanged;
• interflange.

Interflange devices, in their own way, are divided into gate valves of the following types:

• wafer gate valve, made of stainless steel;
• Double flange gate valve;
• wafer gate valves made from chavun.

Popular models of sprayed mi -flanes of valves, for vicorista vicorist, stalls of the beam, tacot є є є є 32, 50, 80, 110. Nights of Danish of Dani of the Clapic and Assault - compact rosisti I is available to the vart. Sometimes, when the wafer valves are removed from the pipeline, there is a loss of the working medium being transported.

Among the lack of check valves produced by modern valves, you can see the flanged lift valve DN150 and model DN100, which are installed and successfully installed on pipelines for various purposes. There is a brass wafer-type gate valve with two chairs fixed on one axis. Valves of this type of device, which ensure non-vibration in the installation, are used to equip pipelines with a diameter in the range of 50-80 mm.

Flange valve units based on the material they are made of are divided into the following types:

• wafer-type steel gate valve with dry mesh;
• The valve is also equipped with a mesh, which determines the role of the element that filters.

Valves made of chavun or steel alloy are of great size and mass, which carefully encloses the area of ​​their sealing.

In order not to put too much pressure on the working core, which is transported by pipeline, for this equipment you can use spring-type coupling gate valves, which can be either made of cast iron or brass alloy. The spring is also equipped with flanged gate valves, the most popular models being DN50, 80, 110. Their great advantage is that they can be installed in both horizontal and vertical positions. In addition, interflange spring gate valves can successfully withstand such phenomena as water hammer.

When closing the shutter on gate valves that are not equipped with a spring, the force of tension exerted by the shutter itself is applied. Their installation can be done in either a horizontal or vertical position, or just because the flow of the working medium, which is transported by a vertical pipeline, is straight from bottom to top.

Ventilation systems are now equipped with wind gates, which is necessary in order to prevent the obstructed air from flowing back into the area that is being ventilated. Such devices can be found in ventilation systems that serve not only factories, but also office and household premises (kitchens, sanitary facilities, etc.). In addition, ventilation systems are equipped with gate valves, which are installed in large buildings - shopping and leisure centers, shopping complexes, etc.

The design of the gate valves, which are installed in ventilation systems, is made up of everything that is wrapped around, on which special blades are fixed. These shovels can ensure the removal of wind flow with the help of a special spring and gravity force.

Another type of similar device is a valve part (or disk) with a locking element into which a disk protrudes, which expands into a seat with a strengthening element. The locking element of the disc check valve is fixed to the rod, which can move freely in the device body. The gate valve of the disc type can be interflange or coupling. Vikorist is used for equipping pipelines that transport gas working media, and ventilation systems.

Modifications of gate valves and valves

Among the popular manufacturers of valve devices of the gate type you can see the following companies:

• Tecofi (France);
• FAF (Turecchina);
• FERRO (Poland);
• Westshintorg (Republic of Belarus).

As we speak about the most popular models, they are valves DN32, 50, 80, which are rotated by the French company Tecofi. These models, which are made from stainless steel, are characterized by practicality, high reliability and excellent service, making their table tops popular among homeowners.

The main parameters that influence the performance of gate valve devices are:

1. recognition;
2. constructively viconannya;
3. material of preparation;
4. the dimensions of the valve and the cross section of its landing openings.

A short look at the main technical characteristics of the most popular models of gate valves will give us a clear overview of this device.

The gate valve body of this model (16CH42R) is made of chavun, and the other part of the shutter is made of brass. The sealing part DN50 is made from stainless steel material and can be used to equip pipelines that transport water and steam. The gate valve of this model can be operated at a working core temperature of 225° and at a pressure of 1.6 MPa.

Install such a gate valve on both horizontal and vertical pipelines. In this case, on vertical pipelines the pipe is expanded with the inlet pipe down, and on horizontal pipelines the entire wrapping of the pipe must be in a horizontal plane.

The gate valve is of the wafer type DU80, the body is made of galvanized steel or chavun, and the rubber reinforcement element can be installed on pipelines through which hot and cold water is transported. The maximum temperature of the working core, which is rated at DU80, is +90°, and the maximum pressure is 1.6 MPa.

This disc type check valve has elements made of galvanized steel. DU100 can be used in pipelines that transport cold and hot water and steam, with a pressure of 1.6 MPa and a temperature of +130°.

The body of the wafer-type check valve of this model is assembled to equip pipelines of various purposes, fittings with a pipe, and the locking elements, which have two spring seats, are made of stainless steel. DU150 is also used for equipping pipelines that transport naphtha products, and can be installed in both horizontal and vertical positions. The working vice, with which the gate valve of this model can be used, is 1.6 MPa.

As mentioned above, gate valves can be installed on both horizontal and vertical sections of pipelines according to their structural design. Thus, gate valves of the coupling type are installed on horizontal sections of pipelines, and shut-off devices, the fastening element of which is a flange, are installed on vertical sections.

The process of installing a gate type valve (for example, in a sewer system) follows the following sequence:

1. Select the pipe section where the check valve will be installed. Such a plot should be open for further maintenance and therefore extend to the sewer riser.
2. When installing a check valve in an existing sewerage system, care should be taken to ensure that the dimensions of the pipes do not exceed the dimensions of the valve unit.
3. When installing the shutter, you must turn on the arrow on its body, which directly indicates the flow of the medium that is being transported.
4. The method of fixation is chosen carefully depending on the constructive design of the virus.
5. After installing the check valve, check the tightness of all connections.

Installation diagram for a wafer check valve

In addition, to the extent that all the described actions are correctly written, the correctness of the work, the reliability and durability of the pipeline system will be ensured.

1. Installation and operation of the device.
   • Obov'yazkovi for Vikonanny
   • Prior to installation and operation of the device, only persons who have read this documentation and have undergone instruction in following the safety rules are allowed.
   • Before installation, it is necessary to inspect the plant.
   • In case of damage, defects, or damage resulting from improper transportation or storage, the device is not allowed to be put into operation without agreement with the seller.
2. Umovi montage
   • The gate valve is not intended for use as a shut-off valve. Tightness class - B in accordance with GOST 54808-2011
   • In most cases, a spring gate valve cannot handle strong and frequently pulsating flows (for example, behind a piston compressor)
   • It is not allowed to change the gate valves to the operating parameters specified in the technical documentation
   • Before starting operation, the pipelines must be blown out to remove scale and debris.
   • Compliance with the pipeline and between the flanges of the valve should be within 3-5 mm of the ideal values, so that during installation on the valve there is no excessive mechanical stress.
   • The valve can be installed on a vertical, thin or horizontal pipeline, provided that there are instructions for allowing the position in the installation (installation on a vertical or horizontal pipeline with a direct flow “top-to-bottom” - not at all valves for this type of valve):
     
   • The valve is installed on the pipeline so that the arrow on its body is aligned with the flow of the middle, and to ensure uniform wear during operation no closer than 3-5 diameters before or after sounding/turning the pipe .
     
     
   • What is more important is the installation position on a thin or vertical pipeline under the influence of water flowing from below to uphill.
   • It is necessary to install the valve on the horizontal section in such a way that the entire valve stem is installed at 45 degrees to the vertical (horizontal).
   • On a bend in the pipeline, the valve should not be installed, unless it happens, then install it after the flow line and orient the entire valve along the bend radius:
     
   • It is necessary to ensure sufficient space around the check valve for future maintenance work
   • The flow of the middle flows straight behind the arrow on the valve body.
   • Before installation, it is necessary to thoroughly clean the sealing surfaces of the check valve and the connecting flanges.
   • The fastening bolts must be tightened evenly
   • After starting the system, please reconnect at the places of connection
   • Don’t forget to check the presence of currents after several years of work
3. Umovi exploitation .
   • Gate valves ABRA-D-122-EN do not require constant supervision
   • Periodically inspect the valve for leakage in the middle.
   • 
     Respect!
   • Don't bother with the mixture so that it can be heated on the surface.
   • Before performing maintenance or dismantling, make sure that the vibrator is not under pressure and does not experience high temperatures.
   • Do not remove the label with the markings and serial number.
   • It is necessary to check the gate valves regularly, especially not every time, for the presence of flows through the weakened valves.
4. Umovi transportation and saving .
   • Preservation and transportation must be carried out without shock at temperatures: -40…+65 °C.
   • It is not allowed to tamper with third-party objects in the middle or fall into the
   • The valve can be inspected during the hour of replacing the pipelines
   • The virus must be preserved in unpolluted areas and be protected from the influx of atmospheric fallout.
   • When transported, the vibro casing may be damaged due to damage.
5. Rozrahunkovy term of exploitation. Warranty claims.
   • Durable service life - not less than 50 years, when used on water based SanPiN 2.1.4.1074-01 and GOST 2874-82 without mechanical damage to the integrity of the dry coating at temperature ranges corresponding to the technical data sheet, installation and operation instructions and catalogs.
   • The warranty period for compliance with the rules of transportation, storage, installation and operation is established for 12 months from the date of commissioning, and no more than 18 months from the date of sale. For the sake of understanding, the terms of operation of the warranty period must be at least 10 years
   • All food related to warranty claims will be provided by the seller