diaphragm pumps: pumps propulsed with compressed air
Diaphragm pumps are characterized by their spatial segregation of propulsion and pumping mechanics. This makes diaphragm pumps very long lasting. They are very popular in industry and agriculture where mediums are used which could, if they are encountered by the propulsion, could do harm to the technics. Due to this self-priming diaphragm pumps can be used for abrasive, acid alkalic or other aggressive fluids.
Diaphragm pumps are rank amongst displacement pumps. The movement of the membranes creates alternating positive and negative pressure. Through the entry valve the fluid in question to convey is sucked in. As soon as the pressure starts rising again, the fluid is pressed through the outlet valve. Electric diaphragm pumps can vary the pressure and therefore create a very steady and pulsation free flow.
Advantages of a diaphragm pump
Diaphragm pumps have a high pressure but a relatively low flow rate. That is why they are very popular within agricultural and gardening applications. The main use is to convey plant and crop protection as well as pesticides and insecticides or detergents for spraying and spreading.
Thank to the pressure control valve the frequency of positive and negative pressure is adjustable whereby flow rate and flow pressure can be controlled infinitely variable.
But it is not just long durability and reliablity that makes diaphragm pumps very interesting.
Another good reason for the purchase of a diaphragm pump is the simple and rugged build, which allows easy repairs and a quick exchange of accessoires and spare parts. A diaphragm pump is very error proof, "poka yoke" as the Japanese called their concept of "indadvertent error prevention". Therefore the costs and expenditure of time for maintenance are rather low.
Diaphragm pumps are suitable for permanent operation, most of our devices also run without any problems dry, so without a medium.
Diaphragm pumps are dry self-priming, they are available with different kinds of propulsion: electric motor, internal combustion engine or pneumatic.