APV Crepaco R-Series Positive Displacement Pump. Model: R4RX. S/N: C-1732. Nominal capacity: 155 gpm. Displacement per Revolution: 0.175 gal. Maximum Speed: 900 rpm. APV Crepaco pumps are known for their rugged, long-lasting, and efficient performance. Every pump in the line has standard a stainless steel body, resilient molded rotors, and a heavy duty cast iron gear case which provides long-lasting, economical service over a wide range of products and applications. Inlets/outlets: (2) 2 in. dia. ACME fittings. Overall dimensions: 1 ft. 2 in. L x 1 ft. W x 1 ft. 4 in. H.