Alfa Laval Positive Displacement Pump. Model: SRU-4. S/N: 01-5-9374 / 372265. Flow rate for a new pump is 66 gpm with required horsepower and pressure. Discuss with salesperson your process and product to determine if this refurbished pump should handle your specific duty. Maximum speed: 1,000 rpm. Inlets/outlets: (2) 2-1/2 in. dia. S-line fittings. Overall dimensions: 1ft. 9 in. L x 11-1/2 in. W x 1ft. 3 in. H.