Thread Swing Check Valve with soft seat

Thread Swing Check Valve with soft seat

1. Check valve refers to a valve whose opening and closing part is a round disc and acts to block the backflow of media by its own weight and medium pressure. It is an automatic valve, also known as check valve, check valve, return valve or isolation valve. The motion mode of valve disc is divided into lifting type and swing type. Lift check valves are similar in construction to globe valves, except that they lack a stem that drives the disc.
2, the medium from the inlet end (lower side) into, from the outlet end (upper side) out. The valve is opened when the inlet pressure is greater than the sum of disc weight and flow resistance. On the contrary, the valve is closed when the medium flows back.
3. Swing check valves have an oblique disc that rotates about the shaft and work in a similar way to lift check valves. The check valve is often used as the bottom valve of the pumping device to prevent the return of water. The combination of the stop valve and the stop valve can play the role of safety isolation. The disadvantage is that the resistance is large and the sealing is poor when closed.

H74H type sandwich check valve main performance and characteristics:
1. For clip-type connection, it can save cost and be affordable.
2. The raft flap has short stroke, small volume and short length.
3. Suitable for narrow space working condition, easy to install.
4. The impact force is small when closed, and the pressure of the water hammer is small.
Working principle:
Is a super thin check valve, it has the advantages of simple structure, beautiful appearance, light weight, convenient installation, etc. Mainly applicable to the water supply system, petroleum, chemical, metallurgy and other industrial sectors, the installation space is more suitable for the place. It's a valve that automatically stops the flow from going back. The disc of the check valve opens under the action of fluid pressure, and the fluid flows from the inlet side to the outlet side.
Structure and Use
H74H sandwich check valve is a kind of ultra-thin check valve, it has the advantages of simple structure, beautiful appearance, light weight, easy installation and so on. H74 type Ⅰ, type Ⅱ clamping disc type check valve produced by our factory is a kind of ultra-thin shape check valve, it has the advantages of simple structure, beautiful appearance, light weight, convenient installation and so on. The valve is mainly suitable for water supply system, petroleum, chemical industry, metallurgy and other industrial sectors to have installation space limit place is suitable for the most.
Installation should pay attention to the following things:
1. Do not make the check valve bear weight in the pipeline. The large check valve should be supported independently, so that it is not affected by the pressure produced by the pipe system.
2. When installing, pay attention to the direction of the flow of the medium and the direction of the arrow of the valve body.
3. The lifting vertical flap check valve should be installed on the vertical pipe.
4, lift type horizontal flap check valve should be installed on the horizontal pipe.
Features:
1, the valve structure length is short, suitable for the position of narrow space.
2, swing valve disc structure, fluid resistance is small.
3. Depending on the medium pressure, the valve disc is opened under pressure and automatically closed without pressure.
4, suitable for water, steam, oil and so on.
Advantages:
Is a super thin check valve, it has the advantages of simple structure, beautiful appearance, light weight, convenient installation, etc. Mainly applicable to the water supply system, petroleum, chemical, metallurgy and other industrial sectors, the installation space is more suitable for the place. It's a valve that automatically stops the flow from going back. The disc of the check valve opens under the action of fluid pressure, and the fluid flows from the inlet side to the outlet side.
Model H74H is standard for sandwich check valves
Flange connection dimensions
Length of structure
Pressure test
DIN, ANSI, GB (suitable for China)
DIN, ANSI
API 598
H74H type sandwich check valve main performance and characteristics:
1. For clip-type connection, it can save cost and be affordable.
2. The raft flap has short stroke, small volume and short length.
3. Suitable for narrow space working condition, easy to install.
4. The impact force is small when closed, and the pressure of the water hammer is small.

High platform ball valve and flange gate valve is the same type of valve, the difference is that its closing part is a ball, the ball rotates around the center line of the body to achieve the opening and closing of a valve. Ball valves are mainly used to cut off, distribute and change the flow direction of the medium in the pipeline. - Wenzhou Yuzheng Valve Co.,Ltd

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