Data sheet for WIKA PV 31.11 diaphragm pressure switch, covering applications, specs, electrical connections, wetted parts, and options for safety-critical…
The WIKA PV 31.11 diaphragm pressure switch is designed for safety-critical applications in industries such as chemical, petrochemical, oil, gas, and power generation. It features a robust aluminum alloy enclosure with IP66 protection and no power supply needed for switching. The switch supports setting ranges from 0...16 mbar to 0...600 bar, with options for PTFE, Monel, or Hastelloy wetted parts. Electrical ratings up to AC 250 V, 20 A are available with argon gas-filled contacts for enhanced performance.
Mounting is flexible with wall or direct mounting options, and approvals include ATEX, IECEx, and PED for use in hazardous areas. The switch is traceable and 100% tested, ensuring reliability. Set points can be adjusted on-site using an adjustment screw, with repeatability ≤ 1% of span.
| Setting Range | 0 ... 16 mbar to 0 ... 600 bar |
|---|---|
| Enclosure Material | Aluminium alloy, IP66, NEMA 4X |
| Repeatability | ≤ 1% of span |
| Electrical Rating | AC 250 V, 20 A |
| Operating Temperature | -40 ... +85 °C |
| Ignition Protection | Ex d IIC T6/T4 Ga/Gb, Ex ta/tb IIIC T85/T135 Da/Db |
| Weight | Approx. 3.1 ... 3.5 kg |
Setting ranges from 0 ...16 mbar to 0 ... 600 bar, vacuum ranges.
Up to AC 250 V, 20 A with argon gas-filled contacts.
Extended permissible medium temperature -40 ... +85 °C.