Tri-Clover Rotary Pump. Model: PR300. Flow rate for new pump is 300 gpm with required horsepower and pressure. Discuss with salesperson your process and product to determine if this refurbished pump should handle your specific duty. (2) 7-3/4 in. rotors. (2) Flanges diameter: 6 in. 8 mounting holes 7/8 in. dia. Adjacent: 3-3/4 in. opposite: 8-7/8 in. Overall dimensions: 2 ft. 1 in. L x 1 ft. 8 in. W x 1 ft. 6 in. H.