Several features of a WILDEN air-operated diaphragm pump make it a common choice for hazardous or valuable liquids. None of them replaces a proper risk assessment of your site, but they explain why th…
| 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, 316 stainless steel, Hastelloy, polypropylene, PVDF, carbon-filled acetal, PTFE |
Several features of a WILDEN air-operated diaphragm pump make it a common choice for hazardous or valuable liquids. None of them replaces a proper risk assessment of your site, but they explain why these pumps are used where electric pumps are a problem.
The pump is driven by compressed air, so there is no motor or electrical component on the pump itself. For flammable liquids, the pump and pipework should be grounded, and Wilden offers conductive builds for this kind of duty.
The diaphragms separate the liquid from the air side. There is no rotating shaft and no mechanical seal to leak. The diaphragm is the main wear part, so inspect it on a regular schedule, and pipe the air exhaust to a safe place when pumping hazardous liquids: if a diaphragm fails, liquid can reach the exhaust.
If the discharge is blocked, the pump simply stops until the pressure drops. A standard AODD pump cannot produce more discharge pressure than its air supply, which is up to 125 psi (8.6 bar) on most metal Wilden models.
Limits come from the body, the air side and the elastomers together. In Wilden’s data, builds with a polypropylene air side are typically rated to 175 °F (79 °C), while aluminum air sides typically reach 220 to 225 °F (104 to 107 °C). The highest figure we found is 350 °F (177 °C) for an FKM build of the XPS830 (08-14814).
Tell us the liquid and the site conditions and we will suggest a build that suits them.
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.
