• Check Valve
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    Full-swing check valve can automatically prevent back flow of liquid. The disc opens under liquid pressure, while liquid flows from entrance side to exit side. When pressure at entrance side is lower than that of exit side, disc automatically close itself under influence of pressure differences and its gravity, to prevent back flow of liquid.
    Features: Full-opening check valve is designed in accordance with API 6A, while full bore design can enable sweeping through and facilitate cleaning of pipeline maintenance; for big size, a dashpot device is optional to protect the sealing surface with controlling the disc closing time; two main series of soft seal and metal seal can be provided or on the request of customer to adopt threaded seat rings; the powerful flexible graphite gaskets is for check valves of 300 pounds and 600 pounds, while metal ring gasket is for check valves of 900 pounds or above, or on the request of customers.


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