Design
EN 837-3
Sizes
4” & 6” (100 & 160 mm)
Accuracy class
± 1.5% of span
Ranges
Vacuum / Compound to 600 psi (40 bar)
Pressure from 6” H2O (16 mbar) to 100" H2O (250 mbar), 6" (160 mm) flange diameter
Pressure from 6 psi (400 mbar) to 600 psi (40 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
Choice of 600 psi (400 bar) or 1,500 psi (100 bar)
Operating temperature
Ambient: -4°F to +140°F (-20°C to +60°C)
Medium: +212°F (+100°C) maximum
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
Material: 316 stainless steel
Lower mount (LM)
1/2” NPT female
Upper diaphragm housing
≤100” H2O (250 mbar): chrome steel
>100” H2O (250 mbar): 316 stainless steel
Diaphragm element
≤100” H2O: 316 stainless steel
>100” H2O: Duratherm (NiCrCo-alloy)
All ranges with FPM/FKM (Viton) sealing gasket
Movement
Stainless steel
Dial
White aluminum with black lettering
Pointer
Black aluminum, adjustable - Type 432.56
Black aluminum, non-adjustable - Type 433.56
Case
304 stainless steel with pressure relief disc and stainless steel bayonet ring
Window
Laminated safety glass with Buna-N gasket
Case fill
Glycerine 86.5% - Type 433.56
