check valve
A check valve (also known as a check valve or one-way valve) is an automatic valve that achieves one-way flow control through the self weight of the valve disc (opening and closing member) and the pressure of the medium. Its main function is to prevent medium backflow, avoid pump body reversal, and prevent container leakage.
Main Categories and Characteristics
Type Structure Characteristics Applicable Scenarios
Rotary disc-shaped valve disc rotates around the hinge, with small flow resistance, large diameter, and low flow velocity pipeline (such as DN>600)
The lifting valve disc moves vertically along the axis, with good sealing performance for small-diameter and high-pressure pipelines (such as pump outlets)
Butterfly valve disc rotates around the pin axis, with a simple structure, low pressure drop, and limited space. Scenario 1
Axial flow valve disc is coaxial with the flow channel, with fast opening and closing speed for petrochemical high-pressure pipelines (such as ethylene plants)
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