This air operated positive displacement pump is constructed with polypropylene center body, standard stainless steel fasteners and polypropylene casing materials. Features a simul-shift valve that provides ultra-positive, reliable shift signal. Patented 'unbalanced' air valve ensures no-stall operation. Center, end, and dual inlet / outlet manifold configurations for versatile applications. Bolted construction makes for leak-free fluid handling. Modular design is easy to service. Specifications: