ARO Expert Series 3" Ported Metallic Flanged Manifold Diaphragm Pump. The Ultimate in heavy duty pump design! The best of any diaphragm pump on the market today! Up to 4 times the life of traditional diaphragm pumps due to the EXP's new convoluted diaphragm design! Efficiency - Simul-Shift™ valve provides ultra-positive, reliable shift signal. Reliability - ARO's patented 'Unbalanced' air valve ensures no-stall operation. Versatility - Broad range in materials of construction for optimum fluid compatibility. Environmentally Sound - Bolted construction for leak free fluid handling. Serviceability - Easier service through modular design. Pump Casing Materials: Stainless Steel & Hastelloy-C
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