flange cast steel right angle sea valve 

Sea Valve is an inlet Valve installed on both sides, bilge or bottom below the ship's no-load waterline. Open and close the valve through the handwheel or deck transmission mechanism, and the Sea Water Gate Valve controls the water outside the ship to enter the ship to clean and cool the machinery on board. When the ship enters the wharf for maintenance, Marine Sea Valve shall be used as a 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.