Verder Pumps SA (Pty) Ltd
Air operated double diaphragm pumps
Why Air operated diaphragm pumps?
Air operated diaphragm pumps are reciprocating pumps where the working elements are flexible diaphragms. The drive can be by means of a motor driven crank arrangement or 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.
By simply adjusting the air supply the double diaphragm pump provides variable flow and discharge pressures of up to 870 kPa. 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 air operated diaphragm 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.
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.
Why Verderair Air operated diaphragm pumps?
Besides the general advantages of the air operated double diaphragm pumps Verderair offers several other specific advantages. Besides a wide range with proven products for a wide range of applications Verderair offers experience. Verder has almost 50 years of experience with applications for the air operated diaphragm pump. This experience comes from both the industrial and sanitary segments.
Generally people expect air operated diaphragm pumps to be available on a short term. Therfore Verderair works with an efficient stock-management (of course for both pumps and parts) and flexible production. With this Verderair offers a real advantage. So if you need a pump on a real short term; please give us a call!
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