ĐỒNG HỒ ĐO ÁP SUẤT WIKA 312.20

Standard:

      EN 837-1

      See Technical Information IN 00.05 for information on “Selection, installation, handling and operation of pressure gauges”.

Nominal size (NS): Ø 160 mm [6"]

Accuracy class:

      0.6

      0.25 (selectable for scale ranges ≤ 400 bar)

      Grade 3A per ASME B40.100 (selectable for scale ranges ≤ 400 bar)

      Scale ranges 0 ... 0.6 bar to 0 ... 600 bar [0 ... 10 psi to 0 ... 10,000 psi] other units (e.g. psi, kPa) available

      or all other equivalent vacuum or combined pressure and vacuum ranges

Scale:

      Single scale

      Mirror band scale

Zero point setting:

      Without

      From outside through adjustable dial

Pressure limitation:

      Steady: Full scale value

      Fluctuating: 0.9 x full scale value

      Short time: 1.3 x full scale value

Connection location:

      Lower mount (radial)

      Lower back mount

Process connection: 

      G ½ B

      Others on request

Permissible temperature

Medium:

      +80 °C [+176 °F]

      +100 °C [+212 °F] (version with special soft solder)

      +200 °C [+392 °F] (model 332.50, see data sheet PM 03.06)

Ambient: -20 ... +60 °C [-4 ... +140 °F]

Temperature effect: When the temperature at the measuring system deviates from the reference temperature +20 °C [+68 °F]: ≤ ±0.4 %/10 °C [≤ ±0.4 %/18 °F] of full scale value

Case filling:

      Without

      With case filling (model 333.50, see data sheet PM 03.06)

Wetted materials

Process connection: Copper alloy

      Pressure element < 100 bar: Copper alloy, C-type

      ≥ 100 bar: Stainless steel 316L, helical type

      Non-wetted materials

Case Stainless steel:

      Safety level “S0” per EN 837

      Safety level “S1” per EN 837: With blow-out device in case back

Ring:

      Bayonet ring, stainless steel

      Triangular profile ring, polished stainless steel, with clamp

Movement: Copper alloy, wear parts argentan

Dial: Aluminium, white, black lettering

Pointer: Knife edge pointer, aluminium, black

Window: Instrument glass

Ingress protection per IEC/EN 60529: IP54

Adjustment medium:

      Liquid for scale ranges > 25 bar; gas for scale ranges ≤ 25 bar

      Gas for all scale ranges