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

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

The 38mm 1 1/2" P4 clamped metal pumps designed by Jim Wilden feature the original air-operated double-diaphragm (AODD) pump design. Here are the key points:

  1. Rugged Design: These pumps have a straightforward and robust design, making them suitable for general industrial applications.

  2. Ease of Maintenance: Clamped pumps are designed with maintenance in mind. They are easy to install and can be disassembled and reassembled using just a single tool.

  3. Proven Performance: Over time, hundreds of thousands of Jim Wilden’s clamped pumps have successfully moved billions of gallons of fluid annually.

Features & Benefits
• 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

Wetted Housings - Materials
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 - Materials
Center Section - Polypropylene, Acetal, Nickel-Plated
Air Valve - Polypropylene, Acetal
Air Chamber - Aluminum, PFA-Coated, Acetal, Nickel-Plated, Stainless Steel, Halar-Coated

Diaphragm Pump Specifications:

  • Air Inlet: 1/2" FNPT
  • Liquid Inlet: 38 mm (1-1/2")
  • Liquid Discharge: 38 mm (1-1/2")v
  • Connection Type: NPT/BSPT (Threaded)
  • Maximum 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
  • Maximum 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) U
    • Ultra-Flex™ – 269 lpm (71 gpm)
  • Maximum Pressure: 8.6 bar (125 psi)
  • Maximum 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

Elastomer Options
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.

    The Wilden® Pro-Flo® Air Distribution System (ADS) offers outstanding energy conservation and maximizes the mean time between repairs (MTBR) for your Air-Operated Double-Diaphragm (AODD) pump. This durable system excels in various industrial applications. If you have any specific questions or need further details, feel free to ask!

    • Chemical
    • Paint & Coatings
    • Mining
    • Oil & Gas
    • Water & Wastewater
    • Liquid Terminals
    • Process

    Search Results

    (489 results)
    Sort & Filter 2

    Series: 1 1/2" (38mm) Clamped Metal Pro-Flo (P4) Remove FilterManufacturer: Wilden Remove FilterClear all

    HD Product Demos & More

    Stay tuned for releases of new product reviews and videos on our YouTube channel!

    Secure Online Shopping

    We take your privacy and security serious. Feel safe when shopping in our online marketplace.

    • Burks
    • LMI
    • Berkeley
    • Grundfos
    • Goulds Water Technology

    Still have questions?Call our Pump Hotline at 1-800-810-1053

    sign up and save.

    Some content