Specifications include, but are not limited to: . Provide pumps with the minimum flow within the acceptable operating region. Provide pumps with net positive suction head requirements (NPSHR) less than the net positive suction head available (NPSHA) at all operating conditions. a. Primary Design Point: 14,000 gpm at 28 ft TDH; Minimum Pump Efficiency of 85%. Primary design flow shall be between 115% and 125% of the best efficiency flow. b. Secondary Design Condition: 13,000 gpm at 29 ft TDH; Minimum Pump Efficiency of 80%. Secondary design condition shall be between 75% and 85% of the best efficiency flow. c. Low-Head Design Condition: Pump shall be able to operate at full speed and a TDH less than 15 feet within the acceptable operating region. d. Shuftoff: 0 gpm at 32 ft TDH e. Submergence: Minimum required submergence to be less than or equal to 5 feet-4 inches from bottom of suction bell to required water level.
