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CHECK VALVE

The check valve refers to a valve that automatically opens and closes the valve flap by means of the flow of the medium itself, and is used to prevent the back flow of the medium, which is also called a check valve, a check valve, a reverse flow valve, and a back pressure valve. The check valve is an automatic valve whose main function is to prevent back flow of the medium, prevent the pump and drive motor from reversing, and discharge the container medium.

According to the structure, check valve can be divided into three types:

1. Lift Check Valve: Lift check valves are available in both vertical and straight versions.

2. Swing Check Valve: The swing check valve is divided into three types: single-lobed, double-lobed, and multi-lobed.

3. Butterfly Check Valve: The butterfly check valve is divided into a butterfly double flap and a butterfly single flap.

The above several check valves can be divided into four types: a screw connection, a flange connection, a welding and a clip type connection.Yuzheng Valve Co.,Ltd is a professional Check Valve Manufacturer China, we provide you with a variety of valves.

If you want to know if we have the products you need, you can contact us directly!


  • Stainless Steel Table Front Check Valve
    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.
    Model:
  • Stainless Steel H74w Check Valve
    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.
    Model:
  • Stainless Steel Vacuum Flange High Platform Ball Valve
    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
    Model:
  • Stainless Steel Flanged H44W Swing Check Valve
    Stainless Steel Flanged H44W Swing Check Valve, find complete details about Stainless Steel Flanged H14W Swing Check Valve - Wenzhou Yuzheng Valve Co.,Ltd
    Model:

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