Description
Design
- EN 837-3
Sizes
- 4″
- 6″
Accuracy class
- ± 2.5% of span
Ranges
- Vacuum / Compound to 300 psi (20 bar)
- Pressure from 6” H2O (16 mbar) to 100″ H2O (250 mbar), 6″ (160 mm) flange diameter
- Pressure from 6 psi (400 mbar) to 360 psi (25 bar), 4″ (100 mm) flange diameter or other equivalent units of pressure or vacuum
Working pressure
- Steady: full scale value
- Fluctuating: 0.9 x full scale value
Overpressure safety
- 5 x full scale value, max. 600 psi (400 bar)
Operating temperature
- Ambient: -4°F to +140°F (-20°C to +60°C)
- Medium: +212°F (+100°C) maximum
- Storage: -40oF+158°F (-40cC to +70oC)
- -4oF to + 158oF (-20oC to + 70oC) for ranges ≤ 25″WC (60 mbar)
Temperature error
- Additional error when temperature changes from reference temperature of 68°F (20°C) ±0.8% of span for every 18°F (10°K) rising or falling.
Weather protection
- Weather resistant (NEMA 3 / IP54)-dry case
- Weather tight (NEMA 4X / IP66)-liquid-filled case
Pressure connection and lower diaphragm housing
- 1” 150# RF flange or
- 2” 150# RF flange
Case and upper diaphragm housing
- Material: stainless steel
- Case with blowout disk and stainless steel bayonet ring
Diaphragm element
- ≤100” H2O (250 mbar): 316 stainless steel with PTFE lining
- > 100” H2O (250 mbar): Duratherm (NiCrCo-alloy) with PTFE lining
Movement
- Material: stainless steel
Dial
- White aluminum with black lettering
Pointer
- Black aluminum, adjustable-Type 452.50
- Black aluminum, non-adjustable-Type 453.50
Window
- Laminated safety glass with Buna-N gasket
Case fill
- Standard dry
- Glycerine 86.5% – Type 453.50
