Wilden Products

Durability, Reliability and Cost Savings

Not only are Wilden pumps the most cost-effective, reliable and energy-efficient solutions available, but our state-of-the-art air distribution systems (ADS) significantly increase positive displacement pump productivity by reducing air consumption and maintenance for the most energy-efficient AODD pump operation possible.

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Wilden® solves pumping challenges across the spectrum

Wilden® positive displacement air-operated double-diaphragm (AODD) pump solutions are leading the way in a host of industries and applications.

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The Wilden World of Service and Support - Assistance Beyond Expectations

Wilden® is always ready to assist with technical support for Wilden AODD pumps, parts or accessories.

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P4 Pro-Flo 1.5 AL P4 Pro-Flo 1.5 SS P4 Pro-Flo 1.5 Ductile Iron

38 mm (1-1/2") Pro-Flo® Series Clamped Metal Pump P4

AIR INLET
  • 1/2" FNPT
LIQUID INLET
  • 38 mm (1-1/2")
LIQUID DISCHARGE
  • 32 mm (1-1/4")
CONNECTION TYPE
  • NPT/BSPT (Threaded)
MAX SUCTION LIFT CAPABILITY
  • Rubber – 5.8 m (19.0') Dry, 8.0 (26.0') Wet
  • TPE – 5.2 m (17.0') Dry, 8.8 m (29.0') Wet
  • Full-Stroke PTFE – 6.4 m (21.0') Dry, 9.3 m (30.6') Wet
  • Reduced-Stroke PTFE – 3.7 m (12') Dry, 8.5 m (28') Wet
  • Ultra-Flex™ – 5.2 m (17.0') Dry, 8.5 m (28.0') Wet
MAX FLOW RATE
  • Rubber – 288 lpm (76 gpm)
  • TPE – 307 lpm (81 gpm)
  • Full-Stroke PTFE – 330 lpm (87.2 gpm)
  • Reduced-Stroke PTFE – 295 lpm (78 gpm)
  • Ultra-Flex™ – 269 lpm (71 gpm)
MAX PRESSURE
  • 8.6 bar (125 psi)
MAX DIAMETER SOLIDS
  • 4.8 mm (3/16'')
DISPLACEMENT PER STROKE *
  • Rubber – 0.98 L (0.26 gal)
  • TPE – 1.1 L (0.29 gal)
  • Full-Stroke PTFE – 1.1 L (0.29 gal)
  • Reduced-Stroke PTFE – 0.53 L (0.14 gal)
  • Ultra-Flex™ – .76 L (0.20 gal)
  • * 1 cycle = 2 strokes
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Features and Benefits

Featuring the original air-operated double-diaphragm pump design by Jim Wilden, 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. Proven by the test of time, hundreds of thousands of Jim Wilden's clamped pumps have pumped billions of gallons of fluid on an annual basis.

  • NPT and BSP threaded inlet/discharge liquid connections for quick disconnect/connect
  • Decades of proven performance
  • Clamped connections for faster maintenance
  • Low cost
  • Simple installation
  • Ease of operation and maintenance

Downloads

EOMs

Model: P4 | Code: WIL-10183-E-03

Dimensional Drawings

Spec Sheets

Model: P4 | Code: WIL-10183-T-02

Performance and Specifications

Dimensions

Dim-P4-38mm1.5in-CMP

Note: Dimensions vary by material and connection. For additional information, please refer to the P4 Metal Manual.

Flow Curve – TPE-Fitted

Flo-P4-38mm1.5in-CMP

Note: Additional performance curves can be found in the P4 Metal Manual.

AIR INLET
  • 1/2" FNPT
LIQUID INLET
  • 38 mm (1-1/2")
LIQUID DISCHARGE
  • 32 mm (1-1/4")
CONNECTION TYPE
  • NPT/BSPT (Threaded)
MAX FLOW RATE
  • Rubber – 288 lpm (76 gpm)
  • TPE – 307 lpm (81 gpm)
  • Full-Stroke PTFE – 330 lpm (87.2 gpm)
  • Reduced-Stroke PTFE – 295 lpm (78 gpm)
  • Ultra-Flex™ – 269 lpm (71 gpm)
MAX PRESSURE
  • 8.6 bar (125 psi)
MAX DIAMETER SOLIDS
  • 4.8 mm (3/16'')
MAX SUCTION LIFT CAPABILITY
  • Rubber – 5.8 m (19.0') Dry, 8.0 (26.0') Wet
  • TPE – 5.2 m (17.0') Dry, 8.8 m (29.0') Wet
  • Full-Stroke PTFE – 6.4 m (21.0') Dry, 9.3 m (30.6') Wet
  • Reduced-Stroke PTFE – 3.7 m (12') Dry, 8.5 m (28') Wet
  • Ultra-Flex™ – 5.2 m (17.0') Dry, 8.5 m (28.0') Wet
DISPLACEMENT PER STROKE *
  • Rubber – 0.98 L (0.26 gal)
  • TPE – 1.1 L (0.29 gal)
  • Full-Stroke PTFE – 1.1 L (0.29 gal)
  • Reduced-Stroke PTFE – 0.53 L (0.14 gal)
  • Ultra-Flex™ – .76 L (0.20 gal)
  • * 1 cycle = 2 strokes

Wetted Housings

Material Ship Weightt
Aluminum 13 kg (29 lb)
Stainless Steel 20 kg (45 lb)
Cast Iron 22 kg (49 lb)
Alloy C
23 kg (51 lb)

Non-Wetted Housings

Description Material
Center Section Polypropylene, Acetal, Nickel-Plated
Air Valve Polypropylene, Acetal
Air Chamber Aluminum, PFA-Coated, Acetal, Nickel-Plated, Stainless Steel, Halar-Coated

Elastomer Options

Material Temperature Limits
Buna-N -12°C to 82°C (10°F to 180°F)
EPDM -51°C to 138°C (-60°F to 280°F)
FKM -40°C to 177°C (-40°F to 350°F)
Neoprene -18°C to 93°C (0°F to 200°F)
PTFE* 4°C to 104°C (40°F to 220°F)
Polyurethane -12°C to 66°C (10°F to 150°F)
Saniflex™ -29°C to 104°C (-20°F to 220°F)
Wil-Flex™ -40°C to 107°C (-40°F to 225°F)

* 4°C to 149°C (40°F to 300°F) - 13 mm (1/2") and 25 mm (1") models only