WILDEN P4 & PS4 1-1/2″ Polypropylene & PVDF AODD Pumps

The P4 and PS4 are Wilden’s clamped 1-1/2 inch plastic pumps. Both have ANSI flanged ports in polypropylene or PVDF. PSG lists 62 P4 builds (36 polypropylene, 26 PVDF) and 19 PS4 builds (11 and 8).

PSG figures

• P4, builds 04-12814 (PP) and 04-12830 (PVDF): 94 gpm (356 L/min), dry lift 13 ft (4.0 m), solids 0.18 in (4.6 mm), 40 lb (18 kg) in PP and 51 lb (23 kg) in PVDF
• PS4, builds 04-13718 (PP) and 04-13312 (PVDF): 100 gpm (379 L/min), dry lift 20.4 ft (6.2 m), solids 0.18 in (4.6 mm), 40 lb (18 kg) in PP and 52 lb (24 kg) in PVDF
• Both: air pressure up to 125 psi (8.6 bar), 40 to 175 °F (4 to 79 °C) on these builds

What to take from this

The PS4 uses the Pro-Flo SHIFT air system, designed to reduce air consumption. On PSG’s figures it also gives a little more flow and noticeably better dry suction lift than the P4. The P4 has the bigger choice of builds, including several with PTFE diaphragms backed by a rubber layer.

PVDF adds roughly a quarter to the weight at this size. That rarely matters on a fixed installation, but it is worth knowing for a portable pump.

For more flow at the same port size, the bolted P400 and PS400 reach about 120 gpm (454 L/min).

Example builds

All 81 plastic builds are listed in our part number lookup. Polypropylene builds: P4 | PS4. PVDF builds: P4 | PS4.