NASA, George C. Marshall Space Flight Center, Procurement Office, Marshall Space Flight Center, AL 35812

48 -- METERING VALVE SOL 8-W-6-02-75256 POC Contact, GP22-J/Kenneth R. Smith, 205-544-0327 or GP24/W. H. Keith NASA/MSFC plans to issue a Request for Quotation (RFQ) For Metering Valves to support the Space Station Facility Thermal and Environmental Control Subsystem -- The metering valve shall be capable of metering 100-200 lbm/hr of coolant water at 50-130xF and up to 100 psia.The pressure drop across the valve in the fully open position shall not exceed 6 psid at a flow rate of 200lbm/hr. The inlet and outlet ports shall be 1/2-inch female connections per MS33649-08. Interconnecting tubing shall be 0.5-inch OD with a 0.028-inch wall hickness.The valve envelope should not exceed 6.5 inches x 4 inches x 3 inches. The valve weight should not exceed 3 lb (2-lb goal). The valve shall be a manually operated metering valve, which will remain or can be latched/locked in any selected position, so as to remain in that position after being subjected to the ascent,,descent, and on-orbit loads specified for Space Station hardware.Lockwire cannot be used to lock the valve in position. At least 5 valve stem revolutions shall be required to fully open or close the valve. The valve shall meet the control requirements of SSP 52000-IDD-PRP, Section 3.12.4.4. Valve mounting provisions shall be provided and shall be capable of withstanding the environmental design requirements specified for Space Station hardware. The valve shall have a visual indication of the approximate valve position, including open/closed labels. The valve shall have a minimum operational life of 15 years, allowing for periodic inspections, corrective maintenance, and replacement of softgoods. The external leakage for the valve shall not exceed 3 x 10-5 scc/sec GHe at 100 psia internal pressure throughout the operating temperature range. The valve shall be verified as flight hardware (via test and assessment) for use on the Space Station. It shall meet the materials and environmental requirements for Space Station hardware.MEDIUM - The medium shall be coolant water, referred to as heat transport fluid for Internal Active Thermal control (IATC), in accordance with Space Station requirement SSP 30753.(Materials Compatibility: The IATC heat transport fluid is designed for use with stainless steel, nickel base, and titanium alloys expected for use in the IATC. Aluminum and copper base alloys are not to be used in the IATC heat transport fluid. Nonmetallic materials used in the IATC should not support microbial growth inside the IATC)1 FLOW RATE - The valve shall be capable of metering H2O FLOW RATES OF 100 TO 200 lbm/hr. PRESSURE LIMITS The pressure limits for the valve are as follows: Maximum Operating Pressure: 100 psia Proof Pressure: 150 (+5,-0) psig Burst Pressure: 250 (+10,- 0) psig -- PRESSURE DROP - The pressure drop across the valve in the fully open position shall not exceed 6 psid at a flow rate of 200 lbm/hr of H2O. TEMPERATURE - The valve shall be capable of operation over a fluid temperature range from 50 to 130xF. VALVE CONFIGURATION - The valve shall be a manually operated metering valve, which will remain or can be latched/locked in any selected position, so as to remain in that position after being subjected to the ascent, descent, and on-orbit loads specified herein. Lockwire CANNOT be used to lock the valve in position. At least 5 valve stem revolutions shall be required to fully open or close the valve. The valve shall meet the control requirements of SSP 52000-IDD-PRP Section 3.12.4.4. Valve mounting provisions shall be provided and shall be capable of withstanding the environmental design requirements specified herein. -- The contractor shall maintain a quality system that will satisfy the requirements of NASA Quality Publication NHB 5300.4 (1B), ''Quality Program Provisions for Aeronautical and Space System Contractors''. The NHB 5300.4 (1B) publication requires a quality program plan to be submitted to the Contracting Officer. A plan is not required if one has been previously submitted to MSFC and is approved. Detailed specifications will be included in the RFQ. -- Quantity -- 4 ea. -- This procurement is being conducted under the Simplified Acquisition Threshold (SAT) portion of the Federal Acquisition Streamlining Act (FASA) -- Requests for copies of the RFQ must be submitted in writing -- Transmission by facsimile to 205-544-9081 or by Internet e-mail to kenneth.smith@msfc.nasa.gov is acceptable -- The RFQ will be posted on or about 15 days after publication of this notice in the Commerce Business Daily (CBD) -- The RFQ will have a 15 day response period -- This procurement is a total small business set-aside -- An ombudsman has been appointed to hear concerns from offerors, potential offerors, and contractors during the preaward and postaward phases of this acquisition -- The purpose of the ombudsman is not to diminish the authority of the contracting officer or the selection official, but to communicate concerns, issues, disagreements, and recommendations of interested parties to the appropriate Government personnel and to work to resolve them. -- When requested, the ombudsman will maintain strict confidentiality as to the source of the concern -- The ombudsman does not participate in the evaluation of quotes, the source selection process, or the adjudication of formal contract disputes -- Interested parties are invited to call the installation ombudsman, Susan M. Smith at 205-544-0012 --Concerns, issues, disagreements, and recommendations which cannot be resolved at the installation may be referred to the NASA ombudsman, Thomas S. Luedtke at 202- 358-2090 -- The solicitation and any related documents to this procurement are available over the Internet -- These documents will be in ASCII format and reside on a World-Wide Web (WWW) server, which may be accessed using client browsers, such as, MOSAIC -- The WWW address, or URL, of the MSFC Procurement home page is: ''http://procure.msfc.nasa.gov''. (0101)

Loren Data Corp. http://www.ld.com (SYN# 0231 19960411\48-0001.SOL)