Air-operated double diaphragm pumps
air-operated diaphragm minipumps
food-processing diaphragm pumps FDA
food-processing and sanitary diaphragm pumps - 3A
horizontal centrifugal pumps
magnetic drive centrifugal pumps
vertical centrifugal pumps
drum transfer pumps
automatic pulsation dampeners
pump-protecting basket strainers
Cubic mini diaphragm pumps and Boxer diaphragm pumps are characterized by exceptional performance, power and strength, making them ideal for pumping liquids with high apparent viscosity even if containing suspended solids.
The stall-prevention pneumatic system assures a safe pump running and it does not need lubricated air.
Self-priming dry capacity even with considerable suction head, fine tuning of speed without pressure loss and the possibility of dry operation without suffering damage mean that these pumps offer unrivalled versatility. In addition, the huge choice of construction materials allows selection of optimum chemical compatibility with the fluid and/or environment without neglecting the temperature range. They are specifically designed for demanding applications with high humidity or in potentially explosive atmospheres (ATEX certification).
- Available in PP, PVDF/ECTFE, ALUMINIUM and AISI 316 STAINLESS STEEL;
- Use in potentially-explosive atmospheres (ATEX zone 1-2 certification);
- Suitable for demanding applications and high-humidity environments;
- Dry operation;
- Dry self-priming;
- Actuated using non-lubricated air;
- Stall-prevention pneumatic circuit;
- Adjustable flow rate and head;
- Fine tuning of motor speed at constant pressure;
- Twin-manifold option (two suction and two delivery);
- Bench or ceiling installation;
- Three suction and delivery positions;
- User-friendly maintenance and parts replacement;
- Excellent performance and value for money.
Description of the pump
Debem diaphragm pumps consist of a stall-prevention centrally-housed pneumatic exchangers. The new generation diaphragms (Long Life profile) are fitted to its shaft. At the two ends, the two pump casings house the ball valves and seats of the product suction and delivery duct.
A = ball valves
How it works
The compressed air introduced by the pneumatic exchanger behind one of the two diaphragms generates compression and pushes the product into the delivery duct, at the same time the opposing diaphragm that is integral with the exchanger shaft creates a vacuum and intakes the fluid. Once the stroke has been completed, the pneumatic exchanger diverts the compressed air behind the opposing diaphragm and the cycle is reversed.
Look at the animated diagram of how the pump works >>>
The heart of an air-operated diaphragm pump consists of the stall-prevention pneumatic exchanger that DEBEM has succeeded in developing and innovating in a revolutionary manner, patenting the most durable and reliable system the market currently has to offer.
This device introduces compressed air to alter the pressure balance of the diaphragms assisted by a stall-prevention circuit that ensures optimum performance even under the most critical conditions.
Diaphragms are the components subjected to greatest stress during suction and pumping, when they must also withstand the liquid’s chemical attack and temperature.
They are made from rubber compounds with special additives that improve chemical properties as well as mechanical bending and strength characteristics. These diaphragms have a nylon backing cloth that improves stress distribution:
NBR: inexpensive and particularly suited to petroleum, abrasives and oil-based liquids;
They are made from thermoplastic polymers that provide high mechanical stress resistance and distribution.
This material is noted for its excellent resistance to high temperatures, chemicals and corrosive agents. DEBEM PTFE diaphragms are subjected to a double heat treatment in order to increase elasticity and service life. Each batch undergoes random destructive testing in order to verify its performance.
Diaphragm pumps should be bolted horizontally to the feet or provided holes.
drum transfer (with max. viscosity 10000 cps at 20° C)
self-priming (with max. viscosity 10000 cps at 20° C)
under head (with max. viscosity 50000 cps at 20° C)
immersed (with max. viscosity 50000 cps at 20° C)
twin suction and delivery manifold (with max. viscosity 50000 cps at 20° C)
twin delivery manifold (with max. viscosity 50000 cps at 20° C)
Look at the diagram of possible installations >>>
The type of liquid, temperature and working environment are factors to be considered when deciding on the best choice of construction materials for the pump and its correct chemical compatibility. Some examples are given in the following table:
Look at the chemical compatibility chart >>>