RFI_-7.docx

DOCX document 13 KB Posted

Attached to
Replace HVAC, Bldg 129 Federal contract opportunity
Solicitation number
FTFA031231
Issued by
Department of the Air Force Materiel Command Test Center

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Text version

FTFA 03-1231 REPLACE HVAC BUILDING 129

REQUEST FOR INFORMATION (RFI)-7

SECTION 23 09 23 3.2.13 Page 31

Q1: In order to select the correct chilled water meters. We need application details to select the correct rotor. What are the line size(s), flow rates, operating temperatures and pressures?

A1.0: Refer to Drawing Set, Sheet M-504; General Notes, Diagrams, and Diagrams Notes. Also, refer to sheet M-602, WC Magnetic Bearing Chiller Schedule for further details.

A1.1: The flowmeter shall be Turbine (Type), 316 SS (Material), 2-20 FPS (Range), within 0.5% of calibrated velocity (Accuracy), and 4-20 mA or 0-10 V (Outputs). The Contractor shall provide manufacturer’s recommended installation kit complete with branch outlet, nipple, full port ball, reducing bushing, and compression fittings. Also, accuracy shall be within +/- 0.5% of rate at the calibrated velocity, within +/- 1% of rate over a 10:1 turndown (3.0 to 30 FT/S) and within +/- 2% of rate over a 50:1.

Flowmeters of the spec references that the minimum straight unobstructed piping for the flowmeter installation shall be at least 10 pipe diameters upstream and at least 5 pipe diameters downstream and in accordance with the manufacturer's installation instructions.

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