Design
ASME B40.100 & EN 837-1
Sizes
2½” & 4” (63 and 100 mm)
Accuracy class
2½”: ± 2/1/2% of span (ASME B40.100 Grade A)
4”: ± 1.0% of span (ASME B40.100 Grade 1A)
Ranges
30”Hg / 0 / 150 psi (84°F)
30”Hg / 0 / 300 psi (126°F)
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: +212°F (+100°C)
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 / IP66)
Pressure connection
Material: 316L stainless steel
1/4” NPT, lower mount (LM)
Bourdon tube
Material: 316L stainless steel
C-shape
Movement
Stainless steel
Dial
White aluminum with black and red lettering, 2½” with stop pin
Pointer
Black aluminum
Case
304 stainless steel with vent plug and SS crimp ring.
Case welded to socket
Window
Polycarbonate
Case fill
Glycerine 99.7% – Type 233.53AM
Optional extras
SS restrictor
SS rear flange
Clean for oxygen service
Red drag pointer for mark pointer
Other pressure connections
Silicone or Halocarbon Oil case filling
