ARO PD01P-HPS-PTT-A Compatible 1/4″ Polypropylene Air-Operated Diaphragm Pump

It is a double-diaphragm transfer pump operated by compressed air. Two diaphragms move alternately through air valves to transfer the fluid from the suction line to the discharge line. The positive displacement operating principle ensures that the flow rate remains more stable compared to centrifugal pumps, even with viscous fluids and under varying backpressure conditions. Since it has no mechanical seals or electric motor, the number of wear-prone parts is limited; maintenance is reduced to the periodic replacement of the diaphragm and valve assembly. Thanks to its self-priming design, the pump is not damaged when run dry in applications carrying a risk of running dry, such as tank bottom suction and drum emptying. When the discharge line is closed, the pump slows down and stops until pressure is balanced, and resumes operation when the line is opened. The product is manufactured in dimensions that allow for a direct replacement of existing pumps with the same configuration code.