2.4.6
Pressure and Vacuum Gauge
Gauge shall conform to ASME B40.100, Class 1, 2, or 3, Style X, Type I or
III as required, 115 mm 4-1/2 inches in diameter with phenolic or metal
case. Each gauge range shall be selected so that at normal operating
pressure, the needle is within the middle third of the range.
2.4.7
Temperature Gauges
Industrial duty thermometers shall be provided for the required temperature
range. Thermometers shall have a Fahrenheit scale on a white face. The
pointer shall be adjustable.
2.4.7.1
Stem Cased-Glass
Stem cased-glass case shall be polished stainless steel or cast aluminum,
229 mm 9 inches long, with clear acrylic lens, and non-mercury filled glass
tube.
2.4.7.2
Bimetallic Dial
Bimetallic dial type case shall be not less than 89 mm 3-1/2 inches,
stainless steel, and shall be hermetically sealed with clear acrylic lens.
Bimetallic element shall be silicone dampened and unit fitted with external
calibrator adjustment. Accuracy shall be one percent of dial range.
2.4.7.3
Liquid-, Solid-, and Vapor-Filled Dial
Liquid-, solid-, and vapor-filled dial type cases shall be not less than 89
mm 3-1/2 inches, stainless steel or cast aluminum with clear acrylic lens.
Fill shall be nonmercury, suitable for encountered cross-ambients, and
connecting capillary tubing shall be double-braided bronze.
2.4.7.4
Thermal Well
Thermal well shall be identical size, 13 or 19 mm 1/2 or 3/4 inch NPT
connection, brass or stainless steel. Where test wells are indicated,
provide captive plug-fitted type 13 mm 1/2 inch NPT connection suitable for
use with either engraved stem or standard separable socket thermometer or
thermostat. Extended neck thermal wells shall be of sufficient length to
clear insulation thickness by 25 mm 1 inch.
2.4.8
Unicellular Plastic Foam
Unicellular plastic foam shall be in accordance with ASTM C 534, Type I.
The Contractorshall comply with EPA requirements in accordance with Section
01670 RECYCLED / RECOVERED MATERIALS.
2.4.9
Bird Screen
Screen shall be square mesh, plain weave, 2 by 2 mesh, 1.6 mm 0.063 inch
diameter aluminum wire or 0.79 mm 0.031 inch diameter stainless steel wire.
2.4.10
Galvanized Steel Sheet
ASTM A 653/A 653M, Coating Class G-90, lockforming quality.
SECTION 15652A
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