Metal 4 in. AODD Pump incorporates energy-efficient ADS.

Press Release Summary:

Along with clamped configuration, PS20 Original™ Metal AODD (air-operated double-diaphragm) Pump features Pro-Flo® SHIFT Air Distribution System (ADS) that eliminates over-filling of air chamber and reduces energy consumption. Wetted path is cast iron, and center block material options include aluminum, polypropylene, and stainless steel. Pump offers max discharge pressures to 125 psig, max flow rates to 277 gpm, and max suction lifts to 14.4 ft (dry) and 28.4 ft (wet).

Original Press Release:

Wilden® Introduces New PS20 102 mm (4") Metal AODD Pump with Energy-Efficient Pro-Flo® SHIFT ADS

Grand Terrace, CA – Wilden®, part of PSG®, a Dover company and a worldwide leader in air-operated double-diaphragm (AODD) pump technology, is pleased to announce the release of its new PS20 102 mm (4”) Original™ Metal AODD Pump equipped with the energy-efficient Pro-Flo® SHIFT Air Distribution System (ADS). This new high performance pump features the reliability and energy savings of the Pro-Flo SHIFT ADS while its clamped configuration allows for easier maintenance, diaphragm replacement and cleaning.

Wilden’s patent-pending Pro-Flo SHIFT ADS incorporates a unique Air Control Spool that automatically restricts the amount of air going into the pump during the latter part of each stroke, which eliminates over-filling of the air chamber and results in reduced energy consumption. By optimizing air consumption, the Pro-Flo SHIFT lowers energy and operating costs, achieving up to 60% savings over competitive AODD pump technologies.

The Wilden PS20 has a cast iron wetted path and is available with center block materials in aluminum, polypropylene or stainless steel. Meeting CE and ATEX requirements, the pump features maximum discharge pressures to 8.6 bar (125 psig), maximum flow rates to 1048 lpm (277 gpm), and maximum suction lifts to 4.4 m (14.4’) dry and 8.6 m (28.4’) wet. Diaphragms are available in Buna-N, EPDM, Geolast®, Neoprene, Polyurethane, PTFE, Saniflex™, Viton® and Wil-Flex™.

For more information about Wilden, please visit Wilden is a product brand within PSG, a Dover company. For more information on PSG, please go to

About Wilden Pump and Engineering:

Jim Wilden revolutionized the pumping industry when he invented the air-operated double-diaphragm (AODD) pump in 1955. Since then, Wilden AODD pumps have proven to be trustworthy solutions to pumping applications in a wide variety of industries. Wilden pumps are part of PSG®, a Dover company, and manufactured in Grand Terrace, CA.

Sales Contact:

Erik Solfelt, Diaphragm Pump Product Manager


909-422-1741 or

Media Contact:

Darren Wight, VP Media & Publicity

DeanHouston (agency for PSG)

513-280-0047 or

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