APV Crepaco R-series Positive Displacement Pump. Model: R4R. S/N: 4R-3309. Material of construction: 316 stainless steel. Nominal capacity: 155 gpm. Displacement per Revolution: .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. Its vented cover limits the discharge pressure at a predetermined setting. Inlets/outlets: (2) 2 in. dia. ACME fittings. Overall dimensions: 1 ft. 3 in. L x 11 ½ in. W x 17 ½ in. H.