BUREAU OF RECLAMATION DOI, PO BOX 25007 DFC D7812, DENVER, CO 80225-0007

43 -- PUMPS SOL 142595RQ8100065 DUE 091895 POC Purchasing Agent, EVELYN BUTLER, 303-236-8040, X232 The Bureau of Reclamation, Technical Service Center has a requiement for two pumps; 7.5 hp, 3500 rpm motor; 5.125-inch impeller; 100 gal/min at 60 feet head; Tag with DDN: hrp-16-RF1401 and HRP-16-RF1402; two pumps; 7.5 hp, 3500 rpm motor; 5.785-inch impeller; 100 gal/min at 100 feet head; Tag with DDN: HRP-16-RF1701 and HRP-16-RF1702; four pumps, 3-hp, 1750 rpm motor, 7.785-inch impeller, 50 gal/min at 50 feet head, Tag with DDN:: HRP-16-RF3701 and HRP-16- RF3702. Centrifugal pumps shall have TEFC motors. Pumps and baseplates are to meet ANSI B73.1M 1991 specifications. Pumps shall be back pull out design, to where casing can be left in place when pump is removed for service. Impeller should direct flow of pumped product to the rear of impeller. Wear part of pump will be behind impeller (rear cover plate surface), not inner surface of casing (volute). Wear surface must be flat and easily remachineable to reestablish pump hydraulics. Open Impeller shall be specified only when pumped product contains grindable or digestible materials which may tend to clog a reverse vane type impeller. Self-Priming pumps shall also have reverse vane impeller design, so that wear part is behind impeller and is easily remachinable to reestablish pump hydraulics. Pump casing (volute) not to be primary wear part. Foot valves shall not be used on suction lines. Air bleed line shall be used between pump discharge and check valve to vent air during priming cycle. Impeller shall be threaded to shaft. Threads must not be exposed to pumped product. Shaft to impeller fit must be metal to metal and gasketed. Impeller shall not be attached to shaft using keys, nuts or pins. Impeller must be designed to pass spheres without clogging. Maximum sphere size capability of a manufacture's impeller must be provided on data sheet. Impeller critical clearance should be set between back of impeller and rear cover in order to minimize stuffing box pressure. Seal chamber (stuffing box) designs for use with mechanical seals shall be oversize to prolong seal life. Single seals shall be specified without bypass flush lines. Oversize straight, or tapered bore seal chambers shall be provided to give needed cooling and flushing for the mechancal seal. Cast in flow modifiers should be utilized in bore of seal chambers to reduce internal velocities and resultant erosion in abrasive applications. Impeller/shaft setting must be externally adjustable by means of a micrometer type threaded thrust bearing holder. Adjustment must be facilitated without the use of measuring devices such as feeler gauges or dial indicators.Shafts shall be solid ''non sleeve type'' for pumps using non-fretting mechanical type seals, minimizing shaft deflection at the seal face, therefore increasing seal life. Packed pumps to use replaceable shaft sleeves. Shaft diameter on overhung portion from inboard bearing to impeller, shall be as large as practical and overhung length to be as short as practical, in order to minimize shaft deflection. Pump manufacturer to show on data sheet overhung shaft diameter and diameter under sleeve if sleeve is used. Manufacturer also to show length of shaft overhang from center of inboard bearing to center of impeller waterway. 2 Bearing life must meet minimum B10 standard of 17,500 hours of continuous duty. Largest available bearings supporting the shaft should be chosen so as to exceed B10 standard. Bearing size must be provided on data sheet by pump manufacturer including inside diameter of each bearing. Bearing housing to be sealed by double lip oil seals or labyrinth type seals. Pump shall have capability of using optional c- flange adapter with precise parallel adjustment capability built in to the C-flange adapter. Parallel alignment must be adjustable to .002 or less. Three point motor jack bolts for precise alignment of motor to pump is preferred. Non adjustable C-face machine tolerance aligned designs are not acceptable. Delivery is required no later than November 1, 1995. FOB destination Yuma Desalting Plant, 7301 Calle Agua Salada, Yuma, AZ 85364. This solicitation is reserved for small business, Standard Industrial Code is 5084, business size standard is 500 employees. The contract awarded as a result of this solicitation shall contain the following FAR clauses: 52.203-3, 52.204-3, 52.210-5, 52.210-9, 52.213-1, 52.213-2, 52.213-3, 52.219-1, 52.225-3, 52.232-1, 52.232-25, 52.232-8, 52.233-3, 52.243-1, 52.246-1, 52.247-34, 52.249-1. Questions on the technical requirements of this solicitation should be directed to Chuck Moody (303)236-6203 Ext. 234. Questions on this solicitation and quotations should be directed(0242)

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