Renovation of a water / sewer project in Richlands, Virginia. Working plans call for the renovation of a water / sewer project.

A. Pump manufacturers shall supply pumps as complete units including drivers. Assembly by the contractor of pumps, motors and the like, supplied by various independent manufacturers, will not be allowed. B. Pump motors shall be sized such that the motor does not overload at any point on the operating curve. Pumps and motors shall be designed to operate continuously or intermittently at the conditions scheduled on the Drawings. C. Pump motors shall be 1750 rpm maximum unless otherwise scheduled on drawings. D. Pumps shall be equipped with pressure gages graduated in psi and feet of water for the operating range of the pump. Standard gage is necessary on the discharge line and the suction line, where applicable. E. A tap suitable for insertion of pitot tube shall be provided on the discharge of each pumping unit for testing purposes. F. Pump shall be supplied with standard recommended spare parts as suggested by manufacturers including packing, stuffing box gaskets, shaft couplings, and column couplings. G. All pumps to be provided with permanently affixed nameplates which include impeller diameter, rated capacity in gpm, rated head in feet, rpm, and motor horsepower. H. Pump motors shall be rated for use with variable speed drives and shall have pump impellers balanced for variable speed operation. I. Other motor requirements shall be as specified in Division 26 - Electrical. A. Pumps shall be submersible design, equal to size 9TLC, one stage, 6.4375-inch impeller, bowl diameter 9.25-inch, 3450 rpm. Pump suction diameter shall be 6-inch, and pump discharge diameter shall be 8-inch. Design point shall be 1260 gpm at 106 feet TDH, efficiency at design point 81%. Motor shall be 50 hp, 3600RPM and suitable for 3 Phase, 60 cycle, 480 volt electrical service. Motor shall be suitable for use with a variable frequency controller. Pumps shall be manufactured by Goulds Pumps, Inc. Low suction cut-out pressure setting shall be 55 psi. The low suction pressure cutoff tap shall be located on the downtown tank side of the control valve inside the pump station valve vault. B. Pump diameters and specifications shall be field-verified prior to purchase.