Features and Benefits

Why double diaphragm pumps?

Air operated diaphragm pumps are reciprocating pumps where the working elements are flexible diaphragms. The drive is by means of compressed air acting directly upon the diaphragm. Another possibility is hydraulically drive instead of compressed air. At least two valves, one on the discharge and one on the suction side, are necessary. Several types of valves are used. The most popular valves are flap, cylindrical and ball valves.

Leak free air operated diaphragm pump

Air operated diaphragm pumps are leak free since they have no plungers or piston rods, which pass through the pressure boundary. Leakage can however occur if the diaphragm breaks. It is therefore necessary to replace the diaphragms in the course of preventive maintenance to avoid breakdowns. If necessary double diaphragms can be placed with rupture detection systems on the primary diaphragm.

Variable flow and high pressure

By simply adjusting the air supply the double diaphragm pump provides variable flow and discharge pressures of up to 8 bars (16 bar for high pressure versions). The compressed air can be used to balance liquid pressure and give high discharge capability. A single pump can provide a broad spectrum of pumping capabilities from a few litres up to 1,060 l/min.

Dry running capabilities

Air operated double diaphragm pumps are designed to run dry indefinitely without damage and are self priming from a dry start. The aodd-pump can also run completely submerged or installed with flooded suction. No packing glands are needed and there are no close-fitting, sliding or rotating parts to maintain.

Capabilities

As flow and discharge of the air operated diaphragm pump is infinitely variable one pump can be used for an extremely wide range of capabilities. This elimates the need for costly motor drives and critical calculations.

For more information, please contact us.

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