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Bidder <br />Triple Combination Pumper Specifications for the 43 Complies <br /> <br />City of Elk River Minnesota Yes No <br />Pump shall deliver the percentage of rated discharge at pressure indicated below: <br />- 100% of rated capacity at 150 psi net pump pressure. <br />- 70% of rated capacity at 200 psi net pump pressure. <br />- 50% of rated capacity at 250 psi net pump pressure. <br />Pump body shall be close-grained gray iron, bronze fitted, and shall be horizontally split in two <br />(2) sections for easy removal of the entire impeller shaft assembly (including wear rings). <br />Pump shall be designed for complete servicing from the bottom of the truck, without <br />disturbing the pump setting or apparatus piping. <br />Pump case halves shall be bolted together on a single horizontal face, to minimize chance of <br />leakage and facilitate ease of reassembly. No end flanges may be used. <br />Discharge manifold of the pump shall be cast as an integral part of the pump body assembly, <br />and shall provide a minimum of three (3) 3.50" openings, for flexibility in providing various <br />discharge outlets for maximum efficiency. <br />The 3.50" openings shall be located as follows: One (1) outlet to the right of the pump, one <br />(1) outlet to the left of the pump, and one (1) outlet directly on top of the discharge manifold. <br />Impeller shaft shall be stainless steel accurately ground to size, and supported at each end by <br />oil or grease lubricated, anti-friction ball bearings, for rigid precise support. <br />Bearings shall be protected from water and sediment by suitable stuffing boxes, flinger rings, <br />and oil seals. No special or sleeve type bearings shall be used. <br />Stuffing boxes shall be of the conventional two (2) piece, split-gland type, to permit adjustment <br />or replacement of packing without disturbing the pump. Water shall be fed into stuffing box <br />lantern rings for proper lubrication and cooling when the pump is operating. <br />Lantern rings shall be located at the inner ends of the stuffing boxes, to avoid having to remove <br />them when replacing pump packing. <br />Wear rings shall be bronze and easily replaceable to restore original pump efficiency and <br />eliminate the need to replace the entire pump casing due to wear. <br />PUMP TRANSMISSION <br />Pump transmission shall be made of iron with a horizontally split casing. Power transfer to <br />pump shall be by gear or chain. Drive shafts shall be a minimum of 2.35" diameter hardened <br />and ground alloy steel. Ail shafts shall be ball bearing supported. The case is to be designed as <br />to eliminate the need for water cooling. <br />Page 43 <br /> <br /> <br />