Dahlgren Division, Naval Surface Warfare Center, 17320 Dahlgren Road, Dahlgren, VA 22448-5100

43 -- WELDED ROTOR ASSEMBLY FOR AN EXISTING CLARK 6M-4 COMPRESSOR INCLUDING INSTALLATION SOL N00178-97-R-1045 DUE 071597 POC Janice S. Williams, Contract Specialist, Code SD118 or Paul Learn, Contracting Officer, Code SD11 on (540) 653-7478 WEB: NSWCDD Procurement Division Homepage, http://proc_div.nswc.navy.mil. E-MAIL: To request a copy of Solicitation N00178-97-R-1045, dfauntl@nswc.navy.mil. This requirement is for the acquisition of a replacement welded rotor assembly for the Clark Model 6M-4 centrifugal compressor. This rotor shall comply with the following specifications: the medium handled by the compressor is air; the compressor's operating speed is 3,600 RPM; the compressor inlet flow rate is 85,000 CFM; the compressor ratio is 3.3; the maximum compressor discharge essure is 49.0 PSIA; the maximum compressor inlet temperature is 110 degrees Fahrenheit; the rotor impeller type is backward bladed; the compressor drive is through the discharge end; the compressor rotation is clockwise when viewed from the drive end; the compressor is driven by a 5,500 horsepower -- 1,200 RPM induction motor; the bearing lubrication force feed is 20 PSIG and uses SAE #30 type oil; and the existing compressor shaft has been modified to use Stein Seal Company dry-gas type face seals #3225. This requirement is for a rotor assembly similar to Dresser-Rand Part #426-826-002 but with welded impeller construction. The rotor shall consist of the following components: rotor shaft, balance piston, distance sleeve, shaft end nut, welded impellers, drive coupling half (the existing coupling is a DeLaval brand), and labyrinth seals. The rotor shall be designed and constructed for a minimum fatigue life of 5,000 start-stop cycles. The rotor to be delivered shall be completely interchangeable with the existing rotor and shall not require any modifications to the compressor casing or seals. A Pre-Proposal Conference will be held to provide prospective offerors an opportunity to examine the existing compressor while open. Offerors will be allowed to review/obtain the physical dimensions of the compressor, rotor, seals, and coupling to enable them to propose a replacement rotor assembly meeting the Government specifications/requirements. The exact date and time for this conference will be stated in the solicitation along with instructions for advance notification of offerors' intent to attend this meeting. The compressor is located in Building 403 at the White Oak Detachment of the Dahlgren Division, Naval Surface Warfare Center, 10901 New Hampshire Avenue, Silver Spring, Maryland 20903. The rotor assembly will be acquired through full and open competition and all offerors are encouraged to submit a proposal which will be considered. The Naval Surface Warfare Center, Dahlgren Division, Dahlgren Laboratory Procurement Division is taking steps toward implementing Electronic Commerce (EC) in the acquisition arena; therefore, this Synopsis and resulting Solicitation with any applicable amendments will also be available on the World Wide Web at http://www.nswc.navy.mil/ under Procurement Division or http://proc_div.nswc.navy.mil. (0119)

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