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Differential pressure gauge for the process industry, all-metal media chamber

Differential pressure gauge for the process industry, all-metal media chamber

Model: 732.31, 733.31, 732.51, 733.51
  • Differential pressure measuring ranges from 0 … 16 mbar to 0 … 40 bar or 0 …10 inH2O to 0 … 600 psi
  • High operating pressure and high overload safety up to 40 bar [600 psi]
  • Models 732.31 and 733.31: Case with safety level “S3” per EN 837
  • All-welded media chamber
  • QR code on dial links to instrument-specific information
  • Responsive after-sales service / Customizable
  • High quality / One-year warranty
  • The image is for reference; the actual product willbe based on your custom specifications.
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Description

These differential pressure gauges are constructed from highly corrosion-resistant stainless steel with an all-metal media chamber, ensuring long-term leak tightness without elastomer seals. The robust all-metal design and close-fitting diaphragm element provide exceptional overload safety, making it ideal for aggressive liquid and gaseous media in the chemical and process industries. For extreme environments, the POLARgauge® version supports operation down to -70 °C. Featuring Safety Level “S3”, the case includes a non-splintering window, solid baffle wall, and blow-out back to ensure maximum operator protection. An integrated QR code on the dial allows for easy retrieval of specific product data and certificates.

Specifications

Connection location - Lower mount (radial)
- Side connection locations (right, left, front, back) on request.
Nominal size - ø 100 mm [4"]
- ø 160 mm [6"]
Scale ranges 0 ... 16 mbar to 0 ... 40 bar or 0 ...10 inH2O to 0 ... 600 psi
Accuracy - 1.6
- 1.0
- 2.5
Process connection Standard:
- EN 837-1
- ANSI/B1.20.1
→ For valve manifolds for an instrument hook-up, see “Accessories and spare parts”.

Size:
EN 837-1
- 2 x G ¼, female thread
- 2 x G ½ B, male thread
ANSI/B1.20.1
- 2 x ¼ NPT, female thread
- 2 x ½ NPT, male thread

Restrictor:
- Without
- ∅ 0.6 mm [0.024"], stainless steel
- ∅ 0.3 mm [0.012"], stainless steel

Material (wetted):
- Media chambers with process connection: Stainless steel 1.4571 (316 Ti)
- Venting of the media chambers: Stainless steel 1.4571 (316 Ti)

Diaphragm element:
- Span ≤ 0.25 bar [100 inH2O]: Stainless steel 1.4571 (316 Ti)
- Span ≥ 0.4 bar [160 inH2O]: NiCr alloy (Inconel)

Bellows:
- Stainless steel 1.4571 (316 Ti)
Case Design
- Safety level “S1” per EN 837-1: With blow-out device
- Safety level “S3” per EN 837-1: With solid baffle wall and blow-out back

Material
- Stainless steel 1.4301 (304 SS)
- Stainless steel 1.4571 (316 Ti)

Case filling:
- Without
- Glycerine-water mixture
- Silicone oil
Instruments with case filling with compensating valve to vent and reseal case.
Window - Laminated safety glass
- Polycarbonate
Dial Scale layout:
- Single scale
- Dual scale

Scale colour:
- Single scale: Black
- Dual scale: Black/red

Material:
- Aluminium

Customer-specific version
- Without
- With special scale, e.g. linear pressure or square root incrementation
Other scales, e.g. with red mark, circular arcs or circular sectors, on request → Alternatively, adhesive label set for red and green circular arcs; see data sheet AC 08.03
Pointer Instrument pointer:
- With case filling: Standard pointer, aluminium, black
- Without case filling: Adjustable pointer, aluminium, black

Mark pointer/drag pointer
- Without
- Red mark pointer on window, adjustable
- Mark pointer on bayonet ring, adjustable
- Red drag pointer on window, adjustable
Movement Stainless steel
Filling liquid - Without
- Glycerine-water mixture
- Silicone oil
Ambient temperature - -20 ... +60 °C [-4 ... +140 °F]
- -40 ... +60 °C [-40 ... +140 °F] 1)
- -70 ... +60 °C [-94 ... +140 °F] for low-temperature version POLARgauge
Medium temperature - -20 ... +100 °C [-4 ... +212 °F]
- -20 ... +120 °C [-4 ... +248 °F]
- -20 ... +150 °C [-4 ... +284 °F]
Ingress protection per IEC/EN 60529 - IP54
- IP65
- IP66

Downloads

English

SJ-Gauge-wika-732.31-733.31-732.51-733.51-differential-pressure-gauge-datasheet-en

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