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Check Valve

Ductile Cast Iron Double Flanged Brass Seat Swing Check Valve Non Return Check valve

Place of Origin:China
Brand Name:Jinhongda
Model Number:1/2"-4"
Certification:ISO CE
Temperature of Media:Medium Temperature
Connection:Flange Ends
Product Keywords:sewage check valve
Customized support:OEM, ODM
Minimum Order Quantity:1
Packaging Details:Standard export packing, plastic bag, woven bag, wooden case, or as required.
Delivery Time:To be negotiated
Payment Terms:transfer and letter of credit
Supply Ability:20000 Unit/Units per Month

Check valve refers to a kind of valve with a round valve disc as the opening and closing part and acting by its own weight and medium pressure to block medium backflow. It is an automatic valve, also known as check valve, one-way valve, return valve or isolation valve. The movement mode of valve disc is divided into lifting type and swing type. The lift check valve is similar to the stop valve in structure, only lacking the valve rod that drives the valve disc. The medium flows in from the inlet end (lower side) and flows out from the outlet end (upper side). When the inlet pressure is greater than the sum of the disc weight and its flow resistance, the valve is opened. On the contrary, the valve will be closed when the medium flows back. The swing check valve has a valve disc which is inclined and can rotate around the shaft. Its working principle is similar to that of the lift check valve. The check valve is often used as the bottom valve of the pumping device to prevent the backflow of water. The combination of check valve and stop valve can play the role of safety isolation. The disadvantages are large resistance and poor sealing when closing.

Main Feature:

A check valve, clack valve, non-return valve or one-way valve is a mechanical device, a valve, which normally allows fluid (liquid or gas) to flow through it in only one direction. Check valves are two-port valves, meaning they have two openings in the body, one for fluid to enter and the other for fluid to leave. There are various types of check valves used in a wide variety of applications. Check valves are often part of common household items. Although they are available in a wide range of sizes and costs, many check valves are very small, simple, and/or cheap. Check valves work automatically and most are not controlled by a person or any external control; accordingly, most do not have any valve handle or stem. The bodies (external shells) of most check valves are made of plastic or metal.


Product NameMaterial
Valve BodyCast iron/Ductile iron
BonnetCast iron/Ductile iron
DiscCast iron/Ductile iron
Disc Seat RingStainless steel/Brass/Bronze
Body Seat RingStainless steel/Brass/Bronze
Hinge PinStainless steel


Designs Standard: BSEN593 DIN3202 F6

Face to face: BS1868 DIN3202 F6

Flange: BSE4504 BSEN1092

Test Standard: BS6755

Working Temperature: NBR≦80°C EPDMR≦120°C

Main Parts and Material:

Unit: mm

1BodyDuctile Iron
2BonnetDuctile Iron
3DiskSteel + Nylon +NBR
DNL(MM)Flange dimensions to DIN2501(MM)

For other sizes not mentioned above, please contact us.We have right to change the data without further notice.


The check valve can also be used to supply the auxiliary system in which the pressure may rise above the system pressure. The check valve can be divided into swing check valve (rotating according to the center of gravity) and lift check valve (moving along the axis). The function of this type of valve is to allow the medium to flow in only one direction and prevent the flow in the opposite direction. Usually, the valve works automatically. Under the pressure of fluid flowing in one direction, the valve disc opens; When the fluid flows in the opposite direction, the fluid pressure and the self-closing valve disc of the valve disc act on the valve seat, thus cutting off the flow.

Competitive Advantage

Our company uses the most advanced automation equipment in the production of valves and fittings, and has many years of production experience. Strictly control raw materials and production process during production to ensure product quality. The products are exported to Spain, Russia, Pakistan, Egypt, Vietnam, Malaysia, Thailand and other countries.

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