Full name: Double-acting Heavy Hammer Butterfly Valve, also known as Heavy Hammer Butterfly Lock Valve, Double-acting Air Lock Valve, Double-acting Air Distribution and Ash Discharge Valve, Double-acting Heavy Hammer Ash Discharge Valve, Double-acting Heavy Hammer Air Lock Butterfly Valve, and Double-acting Heavy Hammer Butterfly Ash Discharge Valve. It can both discharge material and lock air, and is a device that automatically discharges ash by utilizing the self-weight of the material.




































