Double dump valves are primarily used to discharge chunky or fibrous, bulk materials from hoppers, bins, and cyclones operating under positive or negative pressure.
Double dump valves have two trap-door flap plates which open and close on an alternating cycle.
Timing of the flap plates is critical in order to make sure a double dump valve operates properly.
This type of double dump valve has no electrical or pneumatic controls and is the least expensive method of operation.
A motor-driven cam rotates and alternately opens the top gate and the bottom plate.