Model: WILDEN P.025 / XP.025 (1/4") and P1 / XP1 / XPS1 (1/2"), clamped
Genuine WILDEN stainless steel P.025 (P025), XP.025, P1, XP1 and XPS1 air-operated diaphragm pumps: 1/4″ and 1/2″, up to 15.8 gpm (60 L/min), 57 builds.
| Flow Rate | 1/4": up to 5 gpm / 19 L/min. 1/2": up to 15.8 gpm / 60 L/min (3.6 m³/h) |
|---|---|
| Head | Max air pressure 125 psi / 8.6 bar |
| Power | Compressed air, max 8.6 bar (125 psi) |
| Inlet / Outlet Diameter | 1/4" NPT (P.025, XP.025); 1/2" NPT or Tri-Clamp (P1, XP1, XPS1) |
| Material | Stainless steel wetted path; polypropylene, acetal or aluminum air side; PTFE, Santoprene, Hytrel, Buna-N, EPDM or FKM diaphragms |
Wilden builds five small models with a stainless steel wetted path. They split into two port sizes. This page answers the practical questions about them one by one.
| Model | Port | Air side | Stainless builds | Max flow |
|---|---|---|---|---|
| P.025 | 1/4″ NPT | Polypropylene | 8 | 5 gpm (19 L/min) |
| XP.025 | 1/4″ NPT | Polypropylene | 5 | 5 gpm (19 L/min) |
| P1 | 1/2″ NPT or Tri-Clamp | Polypropylene or acetal | 26 | 14.4 gpm (55 L/min)* |
| XP1 | 1/2″ Tri-Clamp | Conductive polypropylene | 2 | 14.4 gpm (55 L/min)* |
| XPS1 | 1/2″ NPT or Tri-Clamp | Aluminum | 16 | 15.8 gpm (60 L/min)* |
* Figures from PTFE builds, which run a reduced stroke. Half of the stainless P1 builds use PTFE diaphragms, so that is the number most buyers will see.
Very small. PSG lists 0.02 inch (0.5 mm) for the 1/4 inch pumps and 0.06 inch (1.5 mm) for the 1/2 inch pumps. These are pumps for clean or lightly contaminated liquids, not for slurries.
Yes, within limits. Dry suction lift is 10.67 ft (3.3 m) for the P.025, 16 ft (4.9 m) for the P1 and XP1 PTFE builds and 14.2 ft (4.3 m) for the XPS1 PTFE build. Lifting from a standard drum is well inside that.
On the pages we checked, 40 to 175 °F (4 to 79 °C) with a polypropylene air side, 40 to 180 °F (4 to 82 °C) with acetal and 40 to 220 °F (4 to 104 °C) for the aluminum-bodied XPS1. The Santoprene P.025 build goes down to 32 °F (0 °C). The diaphragm also sets a limit, so check both.
About 10.7 lb (5 kg) for the 1/4 inch pumps, 19 to 20 lb (9 kg) for the P1 and XP1, and 21 to 24 lb (10 to 11 kg) for the XPS1. All are light enough to carry by hand.
The full code on the nameplate, for example P1/SSPPP/TEU/TF/STF. The letters after the model describe the materials, and two builds that look identical from outside can use different diaphragms or seats.
| Part No. | Build code | Elastomer | Connection |
|---|---|---|---|
| 00-9733-R | P.025/SZPPP/TNL/TF/STV | PTFE | Threaded |
| 00-10137 | P.025/SSPPP/WFS/SS/SWF | Santoprene | Threaded |
| 01-2680 | P1/SSPPP/FSS/FS/SFS | Hytrel | Threaded |
| 00-10109 | XP.025/SSPPP/EPS/TF/SBN | EPDM | Threaded |
| 00-9731 | P.025/SSPPP/BNS/TF/SBN | Buna-N | Threaded |
| 01-10495 | P1/SSPPP/VTS/TF/STF | FKM | Threaded |
All 57 stainless 1/4″ and 1/2″ builds, searchable by model: P.025 | XP.025 | P1 | XP1 | XPS1
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