Design
ASME B40.100 & EN 837-1
Sizes
2”, 2½” & 4” (50, 63 and 100 mm)
Accuracy class
2” & 2½”: ± 2/1/2% of span (ASME B40.100 Grade A)
4”: ± 1.0% of span (ASME B40.100 Grade 1A)
Ranges
Vacuum / compound to 200 psi (16 bar)
Pressure from 15 psi (1 bar) to 15,000 psi (1000 bar)
or other equivalent units of pressure or vacuum
Working pressure
2” & 2½”: Steady: 3/4 scale value
Fluctuating: 2/3 full scale value
Short time: full scale value
4 ”: Steady: full scale value
Fluctuating: 0.9 x full scale value
Short time: 1.3 x full scale value
Operating temperature
Ambient: -40°F to +140°F (-40°C to +60°C) - dry
-4°F to +140°F (-20°C to +60°C) - glycerine filled
-40°F to +140°F (-40°C to +60°C) - silicone filled
Medium: +212°F (+100°C) maximum
Temperature error
Additional error when temperature changes from reference temperature of 68°F (20°C) ±0.4% of span for every 18°F (10°K) rising or falling.
Weather protection
Weather tight (NEMA 4X / IP65)
Pressure connection
Material: 316L stainless steel
Lower mount (LM) or center back mount (CBM)
Lower back mount (LBM) for 4” size
1/8” NPT, 1/4” NPT or 1/2” NPT limited to wrench flat area
Bourdon tube
Material: 316 stainless steel
≤1,000 PSI (70 bar): C-shape,
>1,000 PSI (70 bar): Helical
Movement
Stainless steel
Dial
White aluminum with black lettering, 2” and 2½” with stop pin