What are the types of check valves? How to classify?

What are the types of check valves? How to classify?

The check valve is applied to the pipeline to effectively prevent the back flow of the medium, back flow, prevent the reverse flow of the medium caused by the pump, the motor reversal, in short, the main function of the check valve is only one, does not allow the media to flow back, to ensure that the media one-way flow, which Many pipelines can be used; In order to adapt to the actual needs of various types of pipelines to better play the role of check valves, check valves have also derived a lot of types, with different structural forms to distinguish, for the convenience of remembering , using different numbers in the model indicates:

The structure of the check valve includes a lifting valve structure, a swing-opening valve structure, and a butterfly structure; the lifting valve is subdivided into: H41/11H type straight flow check valve, H42/12 vertical stop Return valve, H43/13 type angle flow check valve, these three kinds of check valve in principle use the best vertical installation;

Swing flaps are subdivided into: H44/14 single-valve flap check valves, H45 multi-valve flap check valves, and H46/76 double-valve flap check valves. The above three types of check valves can be installed horizontally. Can also be installed vertically, using a wide range;

H77 type butterfly check valve, the first digit in the model designation is 1-threaded connection type, 4-flange type, 7-pair clamp type; through the introduction of the above type of check valve, it basically covers the current domestic Used check valves, small partners are not a significant step in the recognition of the type of check valve?

Shanghai Pudie Valve Technology Department Editor