Quick-Shutting Stem Extraction Check Valve is one of the high performance products independently developed by Shanghai Power Station Valve Factory Co., LTD. The valve is mainly used for emergency check and power plant steam turbine pipeline system, in the case of sudden loss of pressure of the steam turbine, can be closed in 0.5~1s, prevent the pipeline system steam and condensate backflow caused by steam turbine damage.

The check valve is designed with swing plane hard seal structure. The sealing surface of valve disc and seat is hardfaced with hard alloy. After hardening treatment, it is resistant to high temperature and high pressure, erosion resistance and impact resistance, and reliable sealing.