WEH® Pressure Relief Valve (Medium Pressure)
WEH® pressure relief valves relieve fluid systems when a preset pressure is reached. This protects the installed components from wear or damage caused by excessive pressure. The WEH® pressure relief valve remains closed until the set pressure is reached thanks to a built-in spring. If the set pressure is exceeded, the valve opens and discharges excess medium via a medium outlet (B2). Sealing is provided by a replaceable soft seal. Delivery includes a pressure ring and pressure screw for the Cone & Thread Medium Pressure tube connection 9/16“.
The pressure relief valves are factory-set and tested, and the adjustment screw is then locked and sealed to prevent unintentional adjustment. Please specify the desired set pressure when ordering. The maximum operating pressure of the entire system should not exceed 90% of the set pressure.
Notes:
- WEH® medium pressure relief valves VRA-1-S5 are not considered safety valves or safety accessories within the meaning of the Pressure Equipment Directive 2014/68/EU or the ASME Boiler & Pressure Vessel Code.
- The actual set pressure may vary due to temperature fluctuations or after long intervals between actuations.
| Setting pressure | 103 - 1,379 bar (1,500 - 20,000 psi) |
|---|---|
| Temperature Range | +0°C to +204°C |
| Material | High-strength stainless steel |
| Sealing Material | PEEK (Valve needle) |
| Connection geometry | Medium pressure fitting 60° Cone & Thread |
| Conformity / Tests / Approvals | Pressure equipment type: Pipe-like, pressure-retaining equipment in accordance with Article 2 No. 5 of the Pressure Equipment Directive Classification: Article 4, paragraph 3 |
WEH® medium pressure relief valves are designed for applications with both liquid and gaseous media in fluid group 2 DGR.
Special versions are available for hydrogen applications. Please feel free to inquire!
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