HOW THEY WORK
Air operated double diaphragm pumps (AODD pumps) consist of a coaxial pneumatic motor, two pairs of diaphragms and two pumping chambers. The latter are connected to two manifolds (one suction and one delivery). The suction and delivery phases are regulated by ball valves, retained by appropriate seats. Double diaphragm pumps work by alternating a volume of liquid (volumetric pumps). Operation is by means of diaphragms which work simultaneously in opposite directions: their displacement simultaneously creates a vacuum (suction) and pressure (pumping). Compressed air, introduced behind one of the two pairs of diaphragms, compresses the liquid in the delivery line: the opposite diaphragms, which are attached to the motor shaft and driven by it, simultaneously suck in the same liquid. Once the stroke is complete, the coaxial motor diverts the compressed air and the cycle is reversed. As you can imagine, the pairs of diaphragms always work alternately in both directions, generating their typical pulsating flow.
- Compact design, ideal for reduced industrial spaces.
- Suitable for dry running.
- Volumetric pumps characterised by pulsating flow rate.
- Suitable for use in explosive environments (Atex Certification).