ĐỒNG HỒ ĐO ÁP SUẤT WIKA 212.34

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 (bar) to 1,000 psi (60 bar) or other equivalent units of pressure or vacuum

Working pressure

Steady:         full scale value

Fluctuating:  0.9 x full scale value

Short time:   1.5 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 resistant (NEMA 3 / IP54) - without membrane
Weather tight (NEMA 4X / IP66) - dry case or filled case with membrane installed
Pressure connection
Material: Copper alloy
Lower mount (LM)
1/4” or 1/2” NPT with M4 internal tap
Restrictor
Material: Stainless steel (0.6 mm), standard
Bourdon tube
Material: Copper alloy
C-shape
Movement
Copper alloy. Internal overload stop set at 1.1 x full scale
Overload stop - standard
Underload stop - optional
Dampened movement - optional
Dial
White aluminum with black lettering, stop pin at 6 o’clock
Standard WIKA psi single scales (4½” only) with large figures at beginning and end for quick and easy identification.
Pointer
Black aluminum, adjustable
Case
Black fiberglass-reinforced thermoplastic (POCAN)
Solid front, blowout back
Turret-style case with built in rear flange lugs

Window
Clear acrylic with Buna-N gasket
Case filling Type 213.34
Glycerine 99.7% and >= 40 psi (2.5 bar)
Glycerine 86.5%/Water 13.5% - < 40 psi (2.5 bar)
Optional extras
Silicone dampened movement
Panel mounting adaptor kit (field assembled)
Silicone case filling
Halocarbon case filling
Cleaned for oxygen service
Instrument glass or safety glass window
Drag pointer (maximum reading indicator)
Alarm contacts switches (magnetic or inductive)
Special process connections
Custom dial layout
External zero adjustment (4.5” size only)
Case and ring in red or yellow thermoplastic (4½” LM only)
Insightreflective dial options available in white, fluorescent yellow, fluorescent