WEH® Pressure Relief Valve (High Pressure)
The WEH® ultra high pressure 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). The valve is sealed by a replaceable metal sealing seat. The valve is supplied with pressure rings and pressure screws for the corresponding Cone & Thread high pressure tube connections.
The customer must specify the desired set pressure when ordering. A tolerance range of +/- 100 bar must be taken into account. WEH adjusts the valve at room temperature and tests it for leaks and release behavior. The adjustment screw is then sealed.
The actual set pressure may vary due to temperature fluctuations or after long intervals between actuations.
| Technical Nominal Size | 2.5 mm |
|---|---|
| Max. operating pressure at B2 | PS = 2,500 bar (36,259 PSI) |
| Setting pressure | 400 bar to 2,500 bar (customized) Tolerance: ± 100 bar |
| Temperature Range | +5 °C up to +50 °C |
| Medium | Liquids according to fluid group 2 DGR, e.g. hydraulic oil |
| Media Inlet | 9/16“ UNF female thread |
| Material | High-strength stainless steel |
| Connection geometry | High pressure fittings 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 |
- Delivery includes pre-assembled pressure rings and pressure screws
- Can be installed vertically or horizontally
- Long service life thanks to high-quality metal sealing
- Replaceable sealing seat
- Factory setting and testing of the desired pressure
WEH® pressure relief valves are specially designed for high-pressure hydraulic applications. Alternative versions for other media ranges and applications are available on request.
WEH® pressure relief valves VRA-1-S1 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.
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