Wilden makes several pumps with 1/2 inch ports, and they are easy to confuse. Wilden lists four model families at this size. Here is what separates them. Model Construction Body materials Max flow (ex…
Wilden makes several pumps with 1/2 inch ports, and they are easy to confuse. Wilden lists four model families at this size. Here is what separates them.
Model
Construction
Body materials
Max flow (example build)
P1
Clamped, Pro-Flo
Aluminum, stainless steel, polypropylene, PVDF
15.5 gpm (59 L/min), aluminum
XPS1
Clamped, Pro-Flo SHIFT
Aluminum, stainless steel
15.9 gpm (60 L/min), aluminum
XP1
Clamped, conductive air side
Stainless steel
14.4 gpm (55 L/min), PTFE build
P100
Bolted, Pro-Flo
Polypropylene, PVDF
14.8 gpm (56 L/min), polypropylene
The flows are close, so the choice usually comes down to material and construction. Metal pumps are clamped. The plastic P100 is bolted, and Wilden lists 89 P100 builds in polypropylene and PVDF for corrosive chemicals. The XPS1 uses the newer Pro-Flo SHIFT air system, which Wilden designed to use less compressed air.
Limits to keep in mind
Solids: 0.06 inch (1.5 mm) on the P1 and P100 pages we checked, so the liquid must be fairly clean
Dry suction lift: 19 ft (5.8 m) for the aluminum P1 and 17 ft (5.2 m) for the polypropylene P100
Flow falls as discharge pressure and viscosity rise, so size from the pump curve, not the maximum
All 1/2 inch builds are listed by part number in our WILDEN lookup.
A 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.
Spare 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.