With a solid forged-brass case and socket, WIKA's Bourdon tube brass gauge is designed for the most adverse conditions, including high vibration.
In fact, this brass gauge (model 213.40) is also known as WIKA's "hydraulic gauge." It is commonly used in mobile and stationary machinery hydraulic applications because of its ability to withstand extreme vibration, shock and pulsation.
Design
ASME B40.100 & EN 837-1
Sizes
2½” & 4” (63 & 100 mm)
Accuracy class
2½”: ± 2/1/2% of span (ASME B40.100 Grade A)
4”: ± 1% of span (ASME B40.100 Grade 1A)
Ranges
Vacuum / Compound up to 200 psi (16 bar)
Pressure from 15 psi (1 bar) up to 15,000 psi (1,000 bar)
or other equivalent units of pressure or vacuum
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: -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: max. +140°F (+60°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 / IP 66)
Brass gauge applications are expanding with the increasing introduction of portable equipment, such as compressors, pumps and hydraulic tools.
Brass gauges are also widely used in upstream oil applications with pressure ranges up to 15,000 psi. In the Texas oil patch, WIKA's brass gauges with glycerin fill are the standard.
Bourdon tube
2½” (63 mm) ≤ 870 psi (60 bar): C-shape copper alloy
2½” (63 mm) > 870 psi (60 bar): Helical copper alloy
4" (100 mm) ≤ 1,000 psi (70 bar): C-shape copper alloy
4" (100 mm) > 1,000 psi (70 bar): Helical stainless steel
Pressure Connection
- Material: copper alloy
- Lower mount (LM) or center back mount (CBM) -
2½” (63 mm)
- Lower mount (LM) or lower back mount (LBM) - 4” (100 mm)
- 1/4” NPT or 1/2” NPT limited to wrench flat area
Movement
Copper alloy
Dial
White aluminum with black lettering, 2½” with stop pin
Pointer
Black aluminum
Case
Gold-painted forged brass with integral connection and vent plug
Bezel ring
Gold-plated ABS cover ring (2½”)
Chrome-plated brass cover ring (4")
Window
Acrylic with Buna-N gasket
Case fill
Glycerine 99.7%