1/4" 1/8" BSP Brass Safety Relief Valve 120PSI Air Compressor
1/4" 1/8" BSP Brass Safety Relief Valve 120PSI Air Compressor
1/4" & 1/8" BSP Brass Safety Relief Valve – 120PSI Air Compressor Pressure Release
Keep your air compressor system operating safely and efficiently with this durable brass safety relief valve. Rated at 120PSI, it automatically vents excess pressure from your compressor tank or pressure piping — protecting your equipment and workshop from over-pressurisation. Available in both 1/8" (DN6) and 1/4" (DN4) BSP male thread sizes, this is an essential replacement part for home workshops, garages, and industrial setups.
Made in Mainland China.
Key Features
- Universal BSP Fit: Compatible with 1/8" (DN6 / 9.5mm) and 1/4" (DN8 / 12.5mm) BSP male thread connections
- 120PSI Rated: Reliably releases pressure at 120PSI to safeguard compressor tanks and pressure vessels
- Solid Brass Construction: Corrosion-resistant brass body built to withstand demanding pneumatic environments
- Compact & Lightweight: Approx. 38mm length × 9mm diameter — easy to install in tight spaces
- Broad Application: Suitable for two-stage air compressors, pressure piping, pressure vessels, and pneumatic systems
- Direct Replacement: Drop-in replacement part for workshop and industrial compressor maintenance
Specifications
| Material | Brass |
| Pressure Rating | 120 PSI |
| Thread Size | 1/8" BSP (DN6 = 9.5mm) / 1/4" BSP (DN8 = 12.5mm) |
| Length | Approx. 38mm |
| Diameter | Approx. 9mm |
| Quantity | 1 piece |
| Origin | Mainland China |
Package Contents
- 1 × Air Compressor Safety Relief Valve (1/8" or 1/4" BSP, 120PSI)
Related Tools & Accessories
Looking to expand your workshop toolkit? Check out these related products:
- Air Compressor Pressure Gauge 0-10/0-12/0-25 Bar | DIY Tool
- 360° Bicycle Chain Cleaner Tool | Bike Gear Cleaning Kit
- Electromagnetic Induction Tester – Coil & Circuit Fault Detector
Learn more: OSHA on personal protective equipment
Frequently Asked Questions
Q: What thread standard does this safety relief valve use?
A: This valve uses BSP (British Standard Pipe) male threads, available in two sizes: 1/8" (DN6, 9.5mm) and 1/4" (DN8, 12.5mm). Always verify your compressor's port thread size and standard before ordering to ensure a correct fit.
Q: At what pressure does this relief valve activate?
A: This valve is rated and set to activate at 120PSI. When system pressure reaches or exceeds this threshold, the valve automatically opens to vent excess pressure, protecting your compressor tank and connected pneumatic components.
Q: Is this valve suitable for two-stage air compressors?
A: Yes. This brass safety relief valve is specifically designed for use on two-stage air compressors as well as single-stage units, pressure vessels, and pressure piping systems. It serves as a direct replacement part for standard BSP-threaded compressor ports.
Q: How do I install the safety relief valve?
A: Ensure your compressor is fully depressurised and powered off before installation. Wrap the male BSP threads with PTFE thread seal tape, then hand-tighten the valve into the matching port on your compressor tank or pressure vessel. Use a spanner to firm it up — avoid over-tightening to prevent thread damage.