Model 73BH - In-tank disc valve
The in-tank disc valve with bottom outlet is installed from top to bottom of the tank. A long spindle connection runs form the pneumatic actuator to the disc valve at the bottom. The actuator keeps the valve in an open position, if the actuator fails a heavy weight moves the disc downwards closing the valve.
According to API 625 Standard adequate for „Tank Systems for Refrigerated Liquefied Gas Storage”
In-tank valve - Model 73BH