GB/T2030-2008 Bronze suction sea valve 

Sea Valve is an inlet Valve installed on both sides, bilge or bottom below the ship's no-load waterline. The Sea Water Gate Valve opens and closes the valve through the handwheel or deck transmission mechanism, and the Steel Right Angle Sea Valve controls the water outside the ship to enter the ship and cleans and cools the machines on the ship. When the ship enters the wharf for maintenance, the sea valve shall be used as the standby valve. The operation of the main engine of the ship needs seawater cooling, so the high and low level submarine gates are set to absorb seawater and provide cooling water for the main engine.

Packing Cock Relief Valve Self Closing Drain Valve Fire Hydrant Storm Valve