Cast iron flange swing type check valve is a kind of automatic valve. It's working principle is to rely on the flow of the medium itself in the pipeline force and automatically open and close. Flange swing type check valve is generally used for pipeline system, the main role is to prevent the reverse flow of the medium, to prevent the pump and its drive motor to reverse, and the medium in the container discharge. Check valves can also be used to supply lines in which pressure may rise above the pressure of the primary system to the auxiliary system
Swing type check valve work pressure is PN1.6 ~ 16.0 MPa, working temperature is - 29 ~ + 550 °. Cast iron swing type check valves are widely used in petroleum, chemical, pharmaceutical, chemical fertilizer, power industry and other conditions of the pipeline, suitable medium for water, oil, steam, acidic media.