What is the connection of ES in the valve?

Here are some of the well-known brands recognized in the valve industry, which are widely recognized and have a high reputation. While rankings may vary depending on time and market conditions, the following brands are generally considered to be among the top brands in the valve industry:

The following influential first-line brands of water system valves and industrial valves can be used as a reference, but for reference only: Suzhou Neway Valve, Shanghai Guanlong Valve, Shanghai Qizhong Valve, Sanhua, Su Yan, Shentong, Su Valve, Nanfang, Jiang.

First, the word Yao. The above manufacturers are only estimates and references, and the specific situation may vary or fluctuate at any time due to changes in a series of factors such as changes in the market, the size of the competition pattern, and the stability of product quality. As an indispensable key device in industrial production and civil facilities, the quality and reputation of the valve brand directly affect the satisfaction and trust of users.

These brands are known in the valve industry for their innovative technology, high-quality products and reliability. It is important to note that the market and industry are evolving rapidly, and different rankings may vary depending on time and region. For the most up-to-date ranking information, it is recommended to refer to industry reports, professional organizations or market research data for more detailed and accurate information.

1. Flange connection: There are flanges at both ends of the valve body, which correspond to the flanges on the pipeline, and are installed in the pipeline by bolting the flanges. Flange connection is the most widely used form of connection in valves. Flanges have convex (RF), flat (FF), convex and concave (MF), etc.

2. Clamp connection: the valve is installed in the middle of the two flanges, and there are usually positioning holes on the valve body to facilitate installation and positioning, and the valve and the two pipes are directly clamped together with bolts.

3. Welding connection: The two ends of the valve body are processed into butt welding grooves according to the requirements of butt welding welding, which correspond to the pipeline welding groove and are fixed on the pipeline by welding.

4. Socket welding: The two ends of the valve body are processed according to the requirements of socket welding, and are connected with the pipeline through socket welding.

5. Threaded connection: Threaded connection is a simple connection method, which is often used for small valves. The valve body is processed according to the standard of each thread, and there are two kinds of internal threads and external threads. Corresponds to the thread on the pipe.

6. Clamp connection: This is a quick connection method, it only needs two bolts, and it is suitable for low-pressure valves that are often disassembled. Such as sanitary valves.

7. Internal self-tightening connection: The above connection forms are all used by external force to offset the pressure of the medium and achieve sealing. The following describes the self-tightening connection form that uses the pressure of the medium.

Its sealing ring is installed at the inner cone, and the side facing the medium is at a certain angle, the pressure of the medium is transmitted to the inner cone, and then to the sealing ring, on the cone surface at a certain angle, two components are generated, one is parallel to the center line of the valve body outward, and the other is pressed to the inner wall of the valve.

The connection methods of valves are mainly divided into: flange type, welded type, clamp type, and thread (internal and external thread).

There are three main connection methods of valves, welded connection, threaded connection and flange connection.

Welded connection valves.

In the case of large nominal diameter, load engraving and high temperature, the valve body often adopts groove welding, and at the same time, there are original requirements for the welding seam, and the welder must be selected to complete this work.

Welded valves with a nominal diameter of less than 50mm usually have welded sockets to accept the pipe at the load plane end. Because socket welding forms a gap between the socket and the pipeline, it is possible that the gap is corroded by some media, and the vibration of the pipeline will fatigue the connection part, so the use of socket welding is limited to a certain extent.

Welded connections are suitable for a wide range of pressures and temperatures, and are more reliable than flange connections when used in more loaded conditions. However, it is difficult to remove and reinstall welded valves, so their use is limited to situations where they usually operate reliably for a long time, or when the conditions of use are high and the temperature is high. Such as thermal power stations, nuclear energy projects, ethylene projects on the pipeline.

Threaded connection valves.

The valves with threaded connection are mainly valves with nominal passage below 50mm. If the bore size is too large, it is difficult to install and seal the connection. Threaded connections are usually machined into tapered or straight threads at the inlet and outlet ends of the valve, which allow them to be connected to the conical threaded fitting or pipe.

Because of the potential for large leaking channels in such connections, these channels can be plugged with sealants, sealing tape, or packing. If the material of the valve body can be welded, but the coefficient of expansion varies greatly, or the operating temperature varies widely, the threaded connection must be honeysealed.

To facilitate the installation and removal of threaded valves, fittings are available at the appropriate location in the piping system. Valves with a nominal diameter of less than 50 mm can use a pipe sleeve as a pipe joint, and the thread of the pipe sleeve joint connects the two parts of the connection together.

Flange connection valve.

The flange connection valve is more convenient to install and disassemble, but the flange connection is heavier than the threaded valve, and the corresponding price is also higher, so it is suitable for pipe connections with various diameters and pressures. When the temperature exceeds 350 degrees, the bolts, gaskets and flanges become relaxed, and the load of the bolts is significantly reduced, and the flange connection with great force may leak.

Threaded connection, snap connection, welding.

According to the caliber and pressure, the greater the caliber pressure, the flange connection material, and the small diameter of the steel has a threaded connection and welding.

Plastic UPVC, PVC is bonded with glue, or flange connection plastic PP, PVDF, ECTFE, hot melt is very good, so no glue is used, they are heated and miscible, and they can also be flanged connected.

The clamp is used to connect the butterfly valve and the check valve, and the flange is also used to clamp!

Valves generally have threads, flanges, clamps, clamps, ferrules, and welding methods. The difference in connection style is related to factors such as cost, pressure, environment, and valve repair. As for how to determine the valve connection method, it is still determined according to the actual requirements based on the above factors.

Threaded type, flange type, clamp type, with expansion joint type, etc.

Valve connection methods include flange connection, butt clamp connection, butt welding connection, threaded connection, ferrule connection, internal self-tightening connection, etc.

Shanghai Valve Factory, Shanghai Guangong Valve Manufacturing**** specializing in the production of valves.

If you need to, you can check it out.

Valve flange sealing surface form: plane (FF), protruding surface (RF), convex surface (M), concave surface (F), concave and convex surface (MF), tenon surface (T), groove surface (G), tenon and groove surface (TG), ring connection surface (RJ).

RTJ refers to the flange seal form of the check valve, which is a ring connection tenon.

A single valve cannot be functional, and the valve must be connected to the pipe to form a piping system before it can function.

Therefore, the shape of the connection between the valve and the pipe (also known as the connecting end or end) is very important. When classifying valves, it is sometimes necessary to distinguish products according to the connection segment.

The representative pipe-to-tube connection methods are mainly as follows:

Threaded type: A connection with threads at the ends.

Flange type: the connection form with flange at the end.

Butt welding connection form: The end part is connected to the pipe by welding.

Socket connection type: The connection form in which the end is connected to the pipe by socket welding.

Brazed connection type: a connection form in which the end is welded and combined with the tube.

Clamp connection type: the valve body passes between the pipe flanges and is clamped by bolts.

Lug flange type: In the clamp connection valve, there is a protruding flange connection form around the valve body.

Bond-joint: The end is a bond-connected connection.

Plug-in connection type: The end has a connection form that undertakes.

- The above content is provided by the technical department of Kitz Corporation of Shanghai).

According to the pipe connection method, it can be divided into: flange connection, internal thread connection, external thread connection, butt welding, socket welding, ferrule connection, basically the above five connection methods.

This guy is right! What a master! Admire, admire, admire.

Connection between the pipe and the valve:

Threaded connection: small application.

The bore valve is connected to the pipe.

Flange connection: generally DN50 or more caliber, are flange bolt connection to clamp connection: specifically refers to the valve body is butterfly valve, butterfly valve clamp connection more ferrule connection:

Such a connection will be used according to the requirements, pneumatic ball valves, Y-shaped corner seats are welded: the valve and the pipeline are connected by welding, and the selection and use of common valve connection methods in the case of large pressure have a greater relationship with the valve body material.

There are welding, thread connection and flange connection.

Cast iron pipes should be socket connections with rubber ring seals.

With an expansion joint, it can also be used as a compensator