Pumps. Well pumps used on the project shall be vertical turbine pumps operating at a maximum speed of 1800 rpm, shall have enclosed impellers, and be provided with either an oil or water lubrication system to prevent bearing wear during pump startup. Discharge heads shall be fabricated steel with a stuffing box for packing. Booster pumps may be vertical turbine pumps, split case pumps or end suction pumps as appropriate for the capacity and head required. Pump stations shall be designed with a minimum of 3 pumps where practical to minimize the loss of capacity should a pump fail. A minimum of one pump at each pump station with multiple pumps shall be provided with a variable frequency drive (VFD). Where a well field exists at least one well pump shall be provided with a VFD. The VFD at each location shall be installed on the pump with the largest capacity. Maximum design discharge pressures at xxxxx and pump stations shall be at or below 250 psi. Pumps used shall be selected so at maximum design flow and head conditions they are operating at their best efficiency or at a location to the left of their best efficiency on their head capacity curve. Pumps operating at 1200 rpm are preferred and 3600 rpm pumps shall only be used in conjunction with close coupled, end suction centrifugal pumps.
Appears in 5 contracts
Samples: Proposed Lease Option, Irrigated Lease, Irrigated Lease
