Airlift pumps type PM (PM 1``, PM 1½``, PM 2`` and PM 110) are used for pumping various media. They are particularly useful during sewage treatment, recirculation of activated sludge, pumping raw waste and removing sand from sand traps. Pumps are made of materials conforming to conditions for conveying potable water (GENOVA system). During air flow cut-off the pump`s construction provides separation of the supply system from the media pumping zone by means of a diaphragm perforated valve, closed by hydrostatic pressure. The pumps are highly reliable and easy to assemble owing to the use of PVC hose as an intake end. The hose can be formed depending on the shape of the tank.
