Products
WIKA Instrument, LP
United States
    Sealgauge Diaphragm Pressure Gauge 422.12, 423.12

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    Description

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    Applications
    • Process industry: chemical/petrochemical, power stations, mining, on and offshore, environmental technology, mechanical engineering and plant construction
    • Suitable for corrosive environments and gaseous or liquid media that will not obstruct the pressure system
    • With liquid filled case for applications with high dynamic pressure pulsations or vibration

    Product Features
    • Ranges from 6" WC (16 mbar)
    • Excellent load-cycle stability
    • Heavy duty cast iron case
    • High overpressure safety
    • Available with switches
    • Threaded or open flange process connection

    Specifications

    Design
    EN 837-3

    Sizes
    4” & 6” (100 & 160 mm)

    Accuracy class
    ± 1.5% of span

    Ranges
    Vacuum / Compound to 200 psi (16 bar)
    Pressure from 10” H2O (16 mbar) to 100” H2O (250 mbar),
     6” (160 mm) flange diameter
    Pressure from 6 psi (400 mbar) to 600 psi (40 bar),
    4” (100 mm) flange diameter
    or other equivalent units of pressure or vacuum

    Working pressure
    Steady: full scale value
    Fluctuating: 0.9 x full scale value

    Overpressure safety
    3x full-scale value, max. 600 psi (40 bar)

    Operating temperature
    Ambient: -4°F to +140°F(-20°C to +60°C)
    Medium: +212°F(+100°C) maximum
    Storage: ≤ 25" H20 -40...+158oF (-40...+70oC)
                   ≤ 25" H20 -4...+158oF (-4...+70oC)

    Temperature error
    Additional error when temperature changes
    from reference temperature of 68°F (20°C) ±0.8%
    of span for every 18°F (10°K) rising or falling.
    Weather protection

    Weather resistant (NEMA 3 / IP54) - dry case
    Weather tight (NEMA 4X / IP66) - liquid-filled case

    Pressure connection and lower diaphragm housing
    Material: carbon steel, black finish
    Lower mount (LM)
    1/2” NPT female

    Case and upper diaphragm housing
    Material: cast iron, black finish
    Case with black-painted steel bayonet ring

    Diaphragm element
    Range ≤ 36 psi (2.5 bar): 316 SS
    Range > 36 psi (2.5 bar): stainless steel AISI 631
    All ranges with Buna-N sealing gasket

    Movement
    Material: copper alloy with nickel-alloy wearable parts

    Dial
    White aluminum with black lettering

    Pointer
    Black aluminum, adjustable

    Window
    Flat instrument glass with Buna-N gasket

    Case fill
    Standard dry
    Glycerine 86.5% - Type 423.12 (accuracy ±2.5%)


    • DS_PM42X_12_en_us_15871.pdf
      323 KB
    • OI_PressureGauges_en_6345.pdf
      242 KB
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