Double Dump Valves

Double Dumps are feed devices for low-pressure applications on fibrous, large particle and/or very abrasive products where rotary airlocks would typically jam and/or suffer intolerable wear.  The maximum pressure differential is normally 20” Wg, while the maximum temperature is in excess of 1,000° F.  These units are ideal on the bottom of dust collectors or gravity feed hoppers.  Carolina Conveying Double Dumps consist of two flaps connected by counterweights or spring loaded spindles, which are operated by a motor driven cam.  The cam alternately opens and closes each flap, allowing material to pass through the separate chambers in batch form and insuring a gas seal.

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