current location: Check valve

Check valve

Check valve refers to the opening and closing parts of the circular or rectangular disc and by its own weight and media pressure to produce action to block the media flow back valve. Automatic valve class, also known as check valve, one-way valve, backflow valve or isolation valve. Disc motion is divided into lifting and swing. Lift check valves are similar in construction to globe valves except for the stem that drives the disc. The medium flows in from the inlet end (lower side) and flows out from the outlet end (upper side). Valve is opened when 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. Swing check valves have a disc that is tilted and rotates on its axis and work in a similar way to lift check valves.

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Product features:

● It is mainly composed of shell, blade, shaft and so on, divided into two types of vertical installation and horizontal installation.

● The shaft and blade are made of stainless steel SS316, and the shell is Q235-B.

● The shaft and hinge of the valve blade should be made of materials that are not easy to rust, so as to ensure flexible and durable rotation;

● The strength of the valve plate should ensure no bending deformation under the maximum load pressure;

● The horizontal installation of the check valve should be reliable balance adjustment mechanism.

● The air lock has the characteristics of close, sensitive opening, small airflow resistance, beautiful appearance and high strength.

● Flame retardant rubber sealing strip is installed on the baffle inside the shell, small gas leakage and low noise after closing.


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