VRVH
Vent to Atmosphere. A compact, highly accurate, direct acting pressure relief valve. Factory preset to desired crack pressure and/or flow specifications. Internal adjustment provides tamper proof safety against inadvertent pressure changes. Available in vent to atmosphere or inline configurations. Valves feature an encapsulated O-ring seal to prevent extrusion at higher differential pressures.
- Body material
- Brass
- Size
- 1/8” Male – 1/4" Male
- Set pressure
- 150–600 Psig
- Seals
- 6
Features
- Accurate and Repeatable Cracking Pressure
- 100% Factory Preset and Tested
- Zero Leakage to 95 – 98% of Set Pressure
- Tamper Proof Adjustment
- Excellent Reseal Performance
- Compact Size
Materials
| Body material | Brass |
|---|---|
| Size | 1/8” Male – 1/4" Male |
| Set pressure | 150–600 Psig |
| Seals | 6 |
| Set Pressure Range | 150 to 600 Psig (10.3 to 42 bar) |
| Inline Valves (Series VRVHI) | details Proof Pressure: 750 Psig (52 bar) Burst Pressure: >1000 Psig (69 bar) |
| Set Pressure Tolerance | Factory preset +/- 5% on increasing pressure: |
| Reseal | 90% of Set Pressure for Elastomers Seals 80% of Set Pressure for PTFE Seals |
| Temperature Range | details -320°F to 350°F (-195°C to 177°C) based on seal selection, see ordering information |
| 1/8” | VRVH · A .94 · VRVH · Hex 1/2" · VRVHI · A 1.44 · VRVHI · Hex 1/2" |
| 1/4" | VRVH · A 1.29 · VRVH · Hex 5/8” · VRVHI · A 1.75 · VRVHI · Hex 3/4" |
| Component | Material |
| Valve Body, Stem, O-Ring Cup | Brass, ASTM B16 |
| Spring Retainer | 316 SS, ASTM A479 |
| Seal1 | As specified, see ordering information |
| Spring | 302 SS/17-7 PH, ASTM A313 |
| Locknut | 18-8 SS |
- 1 Lubricated with Krytox™
Applications & Documents
Configure your order
Select the variables exactly as they appear in the manufacturer datasheet. The full part number is assembled automatically.
Pipe Size (Npt)
single select · 2 valuesNPT threads per ANSI/ASME B1.20.1
Material Code
single select · 1 valuesFor other materials, consult factory
Seal Material
single select · 6 valuesPTFE Seals may not reseal bubble tight.
Nominal Set Pressure
free value · 150–600 PsigSpecify 150-600 Psig Valves that are not actuated for a period of time may exhibit higher
Select variables
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