National Aeronautics and Space Administration, Goddard Space Flight Center, Wallops Flight Facility, Wallops Island, VA 23337

41 -- COOLING TOWER SOL 228-41199-0000/712 DUE 091195 POC Billie R. Blackwell, (804) 824-1431/Contracting Officer, Darlene B. Floyd (804) 824-1410. Cooling Tower, factory assembled, forced draft counter flow type fiberglass, shall have the capacity to cool 1400 gallons per minute of circulating water from 95 degrees F entering temperature to 85 degrees F exit temperature at an ambient wet bulb temperature of 78 degrees F -- 1 each. Shall meet the following specifications: The tower pump head shall not exceed twelve feet. The overall dimensions shall not exceed twenty feet by twenty feet. Flanged connections shall be provided for supply, return, and makeup water. Tower shall have an automatic control valve for makeup water level control. Tower shall have a removable stainless steel basin clean out screen between the basin and the return flange. Fan Equipment: The tower shall utilize six (6) direct drive fan assemblies and six (6) motors at three (3) horse power each for a total of 18.0 horse power. The motors shall be 460 volts, 60 HZ, TEFC, 900 RPM, single speed, single winding. Maximum total brake horsepower shall not exceed 20 horsepower. Towers that utilize one or two fans per tower shall be required to provide a variable speed drive. The variable speed drive shall be adjustable frequency, pulse width modulated, with microprocessor controls. Fans and motors shall be positioned out of the exhaust air stream. A canopy or covering shall protect the fan equipment. The fan equipment supports shall be constructed for fiberglass or T304 stainless steel. A stainless steel or fiberglass guard shall be provided to prevent persons or objects from entering the fan area. Fan motor controls and starters shall be furnished by the government. Motors shall be factory pre-wired to the manufacturer's supplied junction box. An additional spare motor and fan shall be provided by the contractor. Fill Media: Fill media shall be cross fluted film type, PVC material, impervious to decay, fungus, and biological attack and conform to ASTM D-1784, Type 1 Grade 1, with flame spread rating of not more than 15 per ASTM E-84. Fill sheets shall be self-spacing, supported on maximum spans of 7 inches. The fill shall be performance tested by the cooling tower manufacturer to assure final overall cooling tower performance. Drift Eliminators: Drift eliminators shall consist of a single row of self-spacing, rigid PVC blades positioned so as to force three changes in air direction. The drift eliminators shall be assembled in removable sections to access internal components of the cooling tower. The PVC shall conform to ASTM E-1784, Type 1, Grade 1, with flame spread rating of not more than 15 per ASTM E-84. Drift losses shall not exceed 0.005% of the circulating water flow rate. Structure: The towers structure casing and cold water basin shall be constructed of a minimum density of 30 ounces per square foot pultruded fiberglass of premium isophthalic polyester resin and shall have a flame spread rating of less than 25. The fiber reinforcement shall be unidirectional continuous glass fiber, continues roving & mats, and even or non-woven glass fabrics made from type C or type E glass. All pultruded members shall include UV radiation inhibitors molded into the members during pultrusion process. All connectors shall be nylon with 15% fiberglass impregnated. All bolting hardware and metal parts shall be type T304 stainless steel. The tower structure shall be designed for 125 miles per hour wind loading and a seismic loading of 4.0. Tower structure shall include support legs, minimum of 24'' high. Unit and components shall be covered by a standard commercial warranty. This synopsis is being issued to solicit quotations from vendors desiring to furnish the above described item to the Government at the address set forth below. Written quotations in response to this Request for Quotation (RFQ) should be submitted to the attention of the individual(s) set forth above no later than 4:30 p.m. Eastern on September 11, 1995. No separate Request for Quotation will be issued. FOB destination pricing is requested. Delivery to NASA, Goddard Space Flight Center, Wallops Flight Facility, Wallops Island, VA 23337. Delivery is required 90 days after award of purchase order. Award is anticipated to be made within 7 calendar days after the closing date of the RFQ and will be made to the responsible firm submitting the lowest responsive quote. Quotations may be submitted by fax to (804) 824-1974. Collect calls not accepted. (0226)

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