WIKA 232.25 Specifications
Mechanical
Pressure Measurement
Bourdon Tube Pressure Gauges
Hinged Ring Process Gauge - 316SS Wetted Parts
Type 232.25
Applications
Pressure monitoring panels
Suitable for corrosive gaseous or liquid media that will
not clog the pressure system or attack 316L SS parts.
Process industry: chemical/petrochemical, power sta-
tions, mining, on and offshore, environmental technology, mechanical engineering and plant construction
Special features
Hinged ring for access to adjustable pointer
Durable aluminum case and ring
Positive pressure ranges to 20,000 psi
WIKA Datasheet 232.25
Standard Features
Design
ASME B40.100
Sizes
4½” & 6” (115 & 147 mm) dial size
Accuracy class
± 0.5% of span (ASME B40.100 Grade 2A)
± 1.0% of span (ASME B40.100 Grade 1A)
(for 20,000 psi range and above)
Ranges
Vacuum / Compound to 200 psi
Pressure from 15 psi to 20,000 psi
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% for every 18°F (10°C) rising or
falling. Percentage of span.
Bourdon Tube Pressure Gauge Model 232.25
Pressure connection
Material: 316L stainless steel
Lower back mount (LBM)
1/4” or 1/2” NPT with M4 internal tap
Bourdon tube
Material: 316L stainless steel
1,000 psi: C-type
1,500 psi: helical
Movement
Stainless steel. Internal stop pin at 1.3 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
Weather protection
Weather resistant (NEMA 3 / IP54)
WIKA Datasheet 232.25 · 02/2009
Page 1 of 2
Window
Flat instrument glass with silicone rubber gasket
Mounting bolts
10-24 UNC threads - 4½”
1/4-20 UNC threads - 6”
Dimensions
Optional Extras
Threaded restrictor
Cleaned for oxygen service
Safety glass window (4½” size only)
Special process connections
Custom dial layout
120
Front view 4½” side view 6” side view
o
S
o
120
Rear view
Size
A B C D H L M N R S T W Weight
4.5” mm 154.7 68.6 120 35 41.4 27.4 17 19 - 68.32 22
in 6.09 2.70 4.73 1.37 1.63 1.08 0.67 0.75 - 2.69 1/4” 0.87 2.5 lb.
6” mm 192 68.6 120 35 41.4 27.4 17 19 159 88.9 22
in 7.56 2.70 4.73 1.37 1.63 1.08 0.67 0.75 6.26 3.5 1/2” 0.87 3.0 lb.
Recommended panel cutout
4½”: dimension C + 1.5 mm
6”: dimension R + 1.5 mm
Page 2 of 2
Ordering information
Pressure gauge model / Nominal size / Scale range / Size of connection / Optional extras required
Specifications and dimensions given in this leaflet represent the state of engineering at the time of printing.
Modifications may take place and materials specified may be replaced by others without prior notice.
WIKA Datasheet 232.25 · 02/2009
WIKA Instrument Corporation
1000 Wiegand Boulevard
Lawrenceville, GA 30043
Tel (770) 513-8200 Toll-free 1-888-WIKA-USA
Fax (770) 338-5118
E-Mail info@wika.com
www.wika.com
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