Double Diaphragm Pumps are designed for use in applications requiring large volume transfer in a short time. Driven by compressed air, these can transfer contaminated media and are very useful for cleaning out pits with mixed liquids such as oil, water etc. Handle a wide variety of fluids with solid content: as there are no close fitting or rotating parts. Self priming: pump is designed for high suction lift even at dry start up and also with heavier fluids. Ability to run dry: as there are no close fitting or sliding parts. Portable / simple installation: Simply connect air supply line & liquid line; pump is ready to perform. Explosion proof: safe pumps since they are operated by compressed air.