Mapner - Model PRD -Rotary Pistons Pump

The PRD-series three-lobe rotary piston vacuum pumps are highly developed products which can be used in a large variety of applications where it is necessary to convey important flows while keeping vacuum levels of up to 120 Torr (abs.). Based on a pre-intake of auxiliary atmospheric air, but maintaining the basic principle of positive displacement, the operating cycle permits reaching higher vacuum levels with a single compression stage. Volumetric displacement normally ends when gas is compressed and the compression chamber of the pump opens onto the discharge mouth. Auxiliary cooling air sucked from the atmosphere enters the compression chamber before the piston head releases the fluid into the discharge pipe, thus reducing the compression chamber temperature as it builds up.