The submersible pump shall be non-overloading throughout the length of the curve and be capable of operating unsubmerged without damaging the pump. The reserve service factor shall be a minimum of 1.15. The submersible pump shall pass a 2” spherical solid. The motor shall be FM listed for Class 1, Division 1, and Group C & D locations. The submitted performance curve shall show the flow and head capacity of the pump.
CONSTRUCTION：Each pump shall be of the close coupled FM listed Model ______ submersible pump as manufactured by Zoeller Engineered Products of Louisville, Ky. (800-928-7867). The castings shall be constructed of class 30 cast iron with corrosion resistant powder coated epoxy finish. The motor housing shall be finned and oil-filled to dissipate heat. All external mating parts shall be machined and sealed with a buna-n square ring. All fasteners exposed to the liquid shall be 300 series stainless steel. The motor shall be protected on the top side with an attached sealed junction box chamber which in the event of cord damage will prevent moisture wicking into the motor housing. The motor shall be protected on the lower side with a tandem mechanical seal arrangement, with each seal having a separate spring assembly. A seal leak probe shall detect the entrance of moisture. The upper and lower ball bearings shall be capable of handling all thrust loads. The pump housing shall be of the concentric design thereby equalizing the pressure forces inside the housing, which will extend the service life of the seals and bearings. The top cap shall have a SS lifting handle. Inlet screens or strainers are prohibited.