Wilden PS20 Pro-Flo SHIFT Clamped Metal AODD Pumps

4″ | 102 mm Pro-Flo SHIFT Series Clamped Metal Pump

Wilden PS20 Pro-Flo SHIFT Clamped Metal AODD Pumps ensure reliability without sacrificing ease of maintenance. With simple installation and easy serviceability, it’s ready for rugged utilitarian applications that require a robust design. Featuring the Wilden original air-operated double-diaphragm pump design, clamped metal pumps offer a simple, rugged design for general industrial applications. Designed with ease of maintenance in mind, clamped pumps are simple to install and are made for quick serviceability, allowing the pump to be taken apart and put back together with only a single tool.

  • Featuring the Energy-Efficient Pro-Flo® SHIFT ADS
  • Greater flow – more gallons pumped per SCFM
  • Reduced Air Consumption and Kilowatt Usage
  • DIN or ANSI Flanged Inlet/Discharge Liquid Connections
  • Decades of Proven Performance
  • Clamped Connections for Faster Maintenance
  • Low Cost
  • Simple Installation
  • Ease of Operation & Maintenance
MAX PRESSURE: 125 psi (8.6 bar)
LIQUID INLET: 4″ (102 mm)
MAX FLOW RATE: Rubber:  277 gpm (1,048 lpm)
EZ-Install TPE:  265 gpm (1,003 lpm)
Full-Stroke PTFE:  252 gpm (953 lpm)
MAX DIAMETER SOLIDS: 1-3/8″ (35 mm)
MAX SUCTION LIFT CAPABILITY: Rubber:  DRY – 13.5′ (4.1m) | WET – 28.4′ (8.6m)
EZ-Install TPE:  DRY – 14.4′ (4.4m) | WET – 28.4′ (8.6m)
Full-Stroke PTFE:  DRY – 12.7′ (3.8m) | WET – 28.4′ (8.6m)
DISPLACEMENT PER STROKE (1 cycle = 2 strokes): Rubber:  1.2 gal (4.5 L)
EZ-Install TPE: 1.16 gal (4.4 L)
Full-Stroke PTFE: 1.13 gal (4.2 L)


Wetted Housings


Non-Wetted Housings

Ductile Iron 492 lbs (223 kg) Center Block Aluminum, Stainless Steel, Polypropylene
    Air Valve Aluminum,  Anodized Aluminum, Stainless Steel, Polypropylene
      Air Chamber Aluminum, Stainless Steel

Elastomer Options

Material Temperature Limits
Buna-N 10°F to 180°F (-12°C to 82°C)
EPDM -60°F to 280°F (-51°C to 138°C)
FKM -40°F to 350°F (-40°C to 177°C)
Geolast® -40°F to 180°F (-40°C to 82°C)
Neoprene -0°F to 200°F (-18°C to 93°C)
PTFE 40°F to 220°F (4°C to 104°C)

40°F to 300°F (4°C to 149°C) – 13 mm (1/2″) and 25 mm (1″) models only

Polyurethane 10°F to 150°F (-12°C to 66°C)
Saniflex™ -20°F to 220°F (-29°C to 104°C)
Wil-Flex™ -40°F to 225°F (-40°C to +107°C)



CE Mark (Conformité Européene – European Conformity)


Wilden Pump & Engineering LLC has met the criteria for placing the CE mark on our product line. On December 3, 1999, Wilden fully self-certified its product line by meeting all the regulations of the Machinery and PED (Pressure Equipment) Directives. Every pump manufactured by Wilden will now receive the CE mark. Each pump box will also include a Safety Supplement manual in the eleven official languages of the European Community. This CE mark certification is indicative of Wilden’s pledge to providing our distributor network with all the sales tools necessary to excel in a global economy.

ATEX (ATmosphere EXplosible)



It is only natural that the worldwide leading producer of air-operated, double-diaphragm pumps complies with the ATEX 100A directive for explosive atmospheres. The European community and their safety are of utmost importance to us. We take responsibility for not only our product, but also for the supporting documentation and compliance of necessary directives. Wilden is proud to introduce our metallic X pumps that comply with ATEX 94/9/EC Group I, category M2 and Group II, category 2 zones G & D. Our plastic X pumps comply with ATEX 94/9/EC Group II, category 2, zone G.


Wilden Pro-Flo Shift Brochure

Wilden Pro-Flo Shift Brochure

Wilden Pro-Flo Shift PS20 Clamped Metal Pump EOM

Wilden Pro-Flo Shift PS20 Clamped Metal Pump EOM

Wilden Pro-Flo Shift PS20 Clamped Metal Pump Spec Sheet

Wilden Pro-Flo Shift PS20 Clamped Metal Pump Spec Sheet


Talk to one of our Experts

Reach out to our team of Spraying, Pumping, Filtering, Valve, and Systems Specialists today. We know we can help you with any municipal or industrial application challenges.