A Double Dump Valve is commonly used in pneumatic applications where a rotary airlock is not suitable due to the potential for leakage.  Double dumps are also used on fibrous, oversized or very abrasive products where a rotary airlock would suffer intolerable wear. All Sunco double dump valves consist of two flaps connected by counterweights or spring-loaded spindles, which are operated by means of a motor-driven cam.

During operation, product builds up on the flap until a sufficient load overcomes the counterweight.  The cam alternately opens each flap, allowing material to pass through the separate chambers in batch form and thereby ensuring a gas seal.  After cam release, the counterweights (or springs) smoothly return each flap to the sealed position.

Units are suitable for pressure differentials of up to 20 inches water gauge.  However with special consideration to the contact points between the inlet and the flap, a seal can be incorporated to allow pressures up to 5 psi.

Standard Features:
• Sizes available: 6", 8", 10" and 12"   Larger sizes available upon request.
• Materials of construction:  mild steel, cast aluminum, stainless steel
• Actuation: manual, motorized, pneumatic
• Round and square inlet and outlets available
• Robust design for continual operation