Design
ASME B40.100 & EN 837-1
Sizes
2”, 2½” & 4” (50, 63 & 100 mm)
Accuracy class
2” & 2½”: ± 2/1/2% of span (ASME B40.100 Grade A)
4”: ± 1% 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 (1,000 bar)
Pressure from 15 psi (1 bar) to 10,000 psi (700 bar) - 2” size or other equivalent units of pressure or vacuum
Working pressure
2 & 2½”: Steady: ¾ full-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: +140°F (+60°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 / IP 66)
Pressure connection
Material: copper alloy
Lower mount (LM) or center back mount (CBM) -
Lower mount (LM) or lo er back mount (LBM) - 4”
⅛” NPT, ¼” NPT or ½” NPT limited to wrench flat area ABS (2” & 2½”) and white aluminum (4”)
Bourdon tube
2” (50 mm) ≤ 870 psi (60 bar): C-shape copper alloy
2” (50 mm) > 870 psi (60 bar): Helical copper alloy
2½” (63 mm) ≤ 870 psi (60 bar): C-shape copper alloy
2½” (63 mm) > 870 psi (60 bar): Helical copper alloy
2½” (63 mm) > 6,000 psi (400 bar) : Helical stainless steel
4" (100 mm) ≤ 1,000 psi (70 bar): C-shape copper alloy
4" (100 mm) > 1,000 psi (70 bar): Helical stainless steel
Movement
Copper alloy
Dial
White ABS (2” & 2½”) and white aluminum (4”)
Pointer
Black aluminum
Case
304 stainless steel with vent plug and stainless steel crimp ring. Suitable for liquid filling.
Case connection sealed with O-ring, (O-ring material dependent on the case fill):
- 2½”: EPDM O-ring for Glycerine case fill;
Viton O-ring for Silicone fill
- 4”: EPDM O-ring for Glycerine or Silicone case fill;
Viton O-ring for Halocarbon or Fluorolube fill
Window
Polycarbonate with Buna-N gasket
Case fill
Glycerine 99.7% - Type 213.53