WILDEN builds air-operated diaphragm pumps in seven port sizes, from 1/4 inch to 4 inch. Wilden lists 2,476 builds across them. This guide sets out the sizes, the main models and how to narrow the cho…
| Flow Rate | Up to 1049 L/min (277 gpm) on the largest 4" models; depends on model and size |
|---|---|
| Head | Up to 86 m (8.6 bar / 125 psi), depending on air pressure |
| Inlet / Outlet Diameter | 1/4" to 4" (6 to 102 mm), depending on model |
| Material | Aluminum Alloy, Cast Iron, SS316 Stainless Steel, Hastelloy, PP, PVDF, Carbon Filled Acetal |
WILDEN builds air-operated diaphragm pumps in seven port sizes, from 1/4 inch to 4 inch. Wilden lists 2,476 builds across them. This guide sets out the sizes, the main models and how to narrow the choice.
| Port size | Example models | Max flow (example build) | Max solids (where published) |
|---|---|---|---|
| 1/4″ | P.025, PS25 | 5 to 5.7 gpm (19 to 22 L/min) | 0.02 to 0.06 in (0.5 to 1.5 mm) |
| 1/2″ | P1, XPS1, P100 | 14.8 to 15.9 gpm (56 to 60 L/min) | 0.06 in (1.5 mm) |
| 1″ | P2, P220, XPS220, P200 | 44 to 58 gpm (167 to 220 L/min) | 0.13 to 0.25 in (3.3 to 6.4 mm) |
| 1-1/2″ | P4, XPS4, XPS420, P400 | 76 to 132 gpm (288 to 500 L/min) | Up to 0.25 in (6.4 mm) |
| 2″ | P8, XPS8, T8, P800 | 141 to 190 gpm (534 to 719 L/min) | Up to 0.25 in (6.4 mm) |
| 3″ | T15, XPS1520, P1500 | 195 to 271 gpm (738 to 1026 L/min) | Up to 0.25 in (6.4 mm) |
| 4″ | T20, XPS20, PS20 | 274 to 277 gpm (1037 to 1049 L/min) | Not published |
Builds are available in aluminum, stainless steel, cast iron, polypropylene and PVDF, though not every material in every size. The 4 inch pumps, for example, are cast iron, and the plastic pumps stop at 3 inch.
Genuine spare parts are available for current models; search them in our spare parts lookup.
Genuine Wilden AODD Diaphragm Pumps & Spare PartsA real enquiry for 1″ WILDEN parts, line by line: PTFE diaphragm, Hytrel back-up, PTFE balls, stainless seats, shaft, outer piston, pilot sleeve and air valve.
Genuine Wilden AODD Diaphragm Pumps & Spare PartsSpare parts for 4″ WILDEN T20, PS20 and XPS20 iron pumps: what is listed under 20- numbers, and which 3″ air kits the 4″ pumps share.
Genuine Wilden AODD Diaphragm Pumps & Spare PartsSpare parts for bolted 3″ WILDEN pumps: P1500, PS1500, PX1500, the FIT P1520 and P1530, and H1500. Wet end kits, PTFE diaphragms, balls, manifolds and air kits.
