To assure trouble-free check valve operation and shutoff operation, the valve should be periodically opened and closed to keep valve seat and valve disc guide stem free of build up of system contaminants.
To assure trouble-free check valve operation and shutoff operation, the valve should be periodically opened and closed to keep valve seat and valve disc guide stem free of build up of system contaminants.
为了确保无故障止回阀运行和关闭运行，阀门应该定期开启和关闭，以保持阀座和阀瓣引导阀杆避免系统污染物淤积。