ARO Compact Series 1/2" Ported Non Metallic Diaphragm Pump, 14.4 GPM (54.5 LPM) flow. Designed to meet your OEM application needs! Manufactured for complete corrosion resistance - constructed with polypropylene center body, standard stainless steel fasteners, and your choice of Groundable Acetal, PVDF (Kynar) or Polypropylene casing materials. Efficiency - Simul-Shift™ valve provides ultra-positive, reliable shift signal. Reliability - ARO's patented 'Unbalanced' air valve ensures no-stall operation. Versatility - Center, End, and Dual Inlet / Outlet manifold configurations for your application needs. Environmentally Sound – Bolted construction for leak-free fluid handling. Serviceability - Ease of service through modular design. Diaphragm Material: Santoprene, Hytrel, Nitrile, PTFE w/ Santoprene backer, Polyurethane & Viton.