Model DPG40 Differential Pressure Gauge

Brand: WIKA Instruments Ltd.
The differential pressure gauges of the DELTA-line product family are primarily used for the monitoring of low differential pressures where there are high requirements in terms of one-sided overpressure and static pressure.
Features
  • Robust Aluminum case with shatterproof window.
  • Low measuring range from 0 ... 160 mbar.
  • High accuracy up to 1.6 %.
  • Optionally with approvals for hazardous areas.
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The differential pressure gauges of the DELTA-line product family are primarily used for the monitoring of low differential pressures where there are high requirements in terms of one-sided overpressure and static pressure.
Features
  • Robust Aluminum case with shatterproof window.
  • Low measuring range from 0 ... 160 mbar.
  • High accuracy up to 1.6 %.
  • Optionally with approvals for hazardous areas.

Specifications

Nominal Size

  • Differential pressure indication: Ø 100 mm
  • Working pressure indication: Ø 22 mm (not available for ATEX versions)

Accuracy

  • Working Pressure Indication: ≤ 4% of Span
  • Differential Pressure Indication: ≤ 2.5% of Span (option ≤ 1.6 %)

Scale Ranges (EN 837)

  • Differential pressure: 0 ... 0.16 to 0 ... 10 bar

Max. Working Pressure (Stat.)

  • 25 bar

Overpressure Safety

  • Either side max. 25 bar

Permissible Temperature

  • Storage: -40 ... +70° C
  • Medium: -10 ... +90° C
  • Ambient: -10 ... +70° C (at ATEX: -10 ... +60° C)

Ingress Protection

  • IP65 per IEC/EN 60529

Marking per ATEX (option)

  • II 2D c T85° C/T100° C/T135° C X
  • II 2G c IIC T4/T5/T6 X

Media Chamber (wetted)

  • Aluminium, EN AC–Al Si9Cu3(Fe), black lacquered (option: Stainless steel 1.4571)

Process Connections (wetted)

  • 2 x G 1/4 female, lower mount (LM), in-line, centre distance 26 mm

Pressure Elements (Wetted)

  • Working pressure: Bourdon tube from Cu-alloy
  • Differential Pressure: Compression springs from stainless steel 1.4310 and separating diaphragm from FPM/FKM (option: NBR)

Transmission Parts (wetted)

  • Stainless steel 1.4301, 1.4305, 1.4310, FPM/FKM (option: NBR)

Sealings (wetted)

  • FPM/FKM (option: NBR)

Movement

  • Copper alloy

Dial

  • Differential and working pressure indication: White dial, black lettering

Pointer

  • Differential and working pressure indication: Blue pointer

Zero adjustment for differential Pressure indication

  • Via screw in the dial

Case

  • Aluminium, EN AC–Al Si9Cu3(Fe), black lacquered

Window

  • Plastic, with plug screw for zero point adjustment

Weight

  • approx. 1.3 kg

Typical Applications

  • Marine boilers, pressure vessels, bilge-water collection
  • Drinking and cooling-water treatment plants
  • Pressure-boosting stations
  • Heating technology
  • Fire-extinguishing systems

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