ĐỒNG HỒ ĐO ÁP SUẤT WIKA 212.25

Design
ASME B40.100
Sizes
4½” & 6” (115 & 160 mm) dial size
Accuracy class
± 0.5% of span (ASME B40.100 Grade 2A)
Ranges
Vacuum / Compound to 200 psi (16 bar)
Pressure from 15 psi (1 bar) to 1,000 psi 70 bar) or other equivalent units of pressure or vacuum
Working pressure

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)
Medium:

+212°F (+100°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 resistant (NEMA 3 / IP54)
Pressure connection
Material: copper alloy
Lower back mount (LBM)
1/4” or 1/2” NPT with M4 internal tap
Bourdon tube
Material: copper alloy
C-type
Movement
Stainless steel. Internal stop pin at 1.1 x full scale
Dial
White aluminum with black lettering, stop pin at 6 o’clock
Pointer
Black aluminum, adjustable
Case
Black-painted aluminum with 3 threaded mounting bolts.
Solid front, blowout back safety case. 304 stainless steel blowout back plate
Hinged ring
Black-painted steel with knurled clamping screw

Window
Flat instrument glass with silicone rubber gasket
Mounting bolts
10-24 UNC threads - 4½”
1/4-20 UNC threads - 6”
Optional extras
Threaded restrictor
Cleaned for oxygen service
Safety glass window (4½” size only)
Special process connections
Custom dial layout