Butt-weld Swing Check Valve
1、The sealing faces of valve seat and valve clack are build-up welded with hard alloy to improve the erosion resistance and extend the service life of valve.
2、SS+ graphite or metallic seal or pressure self-sealing is adopted between valve body and bonnet for reliable sealing.
3、Suitable for medium backflow prevention in pipeline or device
4、Large check valves are designed with hydraulic damping cylinder to prevent the valve clack from bumping the valve seat, damaging the valve or causing pipeline vibration due to fast closing.
5、In case of pigging requirement, API 6D swing check valve can be manually operated to fix the opening position of valve clack, so as to achieve the pigging objective.