ARO 1” Ported Aluminum PW Series Pump – 60 GPM (227.1 LPM). Fits your current Wilden or Versa-Matic pump configuration. Dimensional Interchange - Fits Wilden® P4, M4 and T4 pumps or Versa-Matic® E4 pump configurations. The ARO PW Series offers a dimensional interchange solution to inefficient, leaking pumps. Structural Integrity - Bolted Construction eliminates problems associated with leaking band-clamps and reduces maintenance costs. Matching Footprint - The Ingersoll Rand / ARO PW10X-X EXP pump has the same footprint as the Wilden® P4, M4 and T4 pumps, plus the Versa-Matic® E4 pumps. Stall-Free, Ice-Free Air Motor Design -The EXP air motor has exclusive Simul-Shift valve technology for faster pump trip-over and smoother flow. It also features. Quick Dump valves; the final answer to pump stalling due to ice build-up. Simplified Plumbing - The Ingersoll Rand / ARO PW10X-X EXP pump matches the fluid inlet / outlet port dimensions of the Wilden P4, M4 and T4 pumps, plus the Versa-matic E4 pumps. Pump Casing Materials: Aluminum. Diaphragm Materials: Santoprene, Nitrile, Hytrel, PTFE w/ Santoprene backer & Viton Wilden® is a registered trademark of the Wilden Pump and Engineering Corporation Versa-Matic® is a registered trademark of the Versa-Matic Pump Company.