Description
The Wilden® P4 is a 38 mm (1-1/2″”) Pro-Flo® Series clamped metal AODD pump featuring Jim Wilden’s original design. This simple, rugged construction is proven across general industrial applications. Clamped connections allow full disassembly with a single tool, minimising downtime. Hundreds of thousands of units globally demonstrate decades of reliable performance.
Features
- Clamped construction for fast, single-tool maintenance and quick serviceability
- NPT and BSPT threaded inlet and discharge liquid connections for quick disconnect/connect
- Five diaphragm options: Rubber, TPE, Full-Stroke PTFE, Reduced-Stroke PTFE, Ultra-Flex™
- Lube-free, self-priming operation; no mechanical seals
- Run-dry capable without damage
- Solids passage up to 4.8 mm (3/16″”)
- High suction lift capability across all diaphragm options
- Low cost with simple installation
- Wetted housings available in aluminium, stainless steel, cast iron, and Alloy C
- Air chamber available in multiple finishes including PFA-coated, nickel-plated, and Halar-coated aluminium
Performance
- Rubber: Max flow 288 lpm (76 gpm); suction lift 5.8 m (19.0′) dry / 8.0 m (26.0′) wet; displacement 0.98 L (0.26 gal) per stroke
- TPE: Max flow 307 lpm (81 gpm); suction lift 5.2 m (17.0′) dry / 8.8 m (29.0′) wet; displacement 1.1 L (0.29 gal) per stroke
- Full-Stroke PTFE: Max flow 330 lpm (87.2 gpm); suction lift 6.4 m (21.0′) dry / 9.3 m (30.6′) wet; displacement 1.1 L (0.29 gal) per stroke
- Reduced-Stroke PTFE: Max flow 295 lpm (78 gpm); suction lift 3.7 m (12′) dry / 8.5 m (28′) wet; displacement 0.53 L (0.14 gal) per stroke
- Ultra-Flex™: Max flow 269 lpm (71 gpm); suction lift 5.2 m (17.0′) dry / 8.5 m (28.0′) wet; displacement 0.76 L (0.20 gal) per stroke
Applications
- General industrial fluid transfer
- Chemical processing and dosing
- Paints, coatings, inks, and dyes
- Mining and mineral processing
- Oil and gas and lube oil transfer
- Water and wastewater treatment
- Food and beverage processing
- Electroplating and surface treatment






