Description
Design
- ASME B40.100 & EN 837-1
Sizes
- 2½”
- 4″
Accuracy class
- 2½”: ± 2/1/2% of span (ASME B40.100 Grade A)
- 4”: ± 1% of span (ASME B40.100 Grade 1A)
Ranges
- Vacuum / Compound up to 200 psi (16 bar)
- Pressure from 15 psi (1 bar) up to 15,000 psi (1,600 bar) or other equivalent units of pressure or vacuum
Working pressure
- 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: +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) – 2½”
- Lower mount (LM) or lower back mount (LBM) – 4”
- 1/4” NPT or 1/2” NPT limited to wrench flat area
Bourdon tube
- 2½” (63 mm) ≤ 870 psi (60 bar): C-shape copper alloy
- 2½” (63 mm) > 870 psi (60 bar): Helical copper alloy
- 2½” (63 mm) > 6,000PSI (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 aluminum with black lettering; 2½” size with stop pin
