{"product_id":"bsp-brass-safety-relief-valve-120psi-air-compressor","title":"1\/4\" 1\/8\" BSP Brass Safety Relief Valve 120PSI Air Compressor","description":"\n\u003ch2\u003e1\/4\" \u0026amp; 1\/8\" BSP Brass Safety Relief Valve – 120PSI Air Compressor Pressure Release\u003c\/h2\u003e\n\u003cp\u003eKeep your air compressor system operating safely and efficiently with this durable \u003cstrong\u003ebrass safety relief valve\u003c\/strong\u003e. Rated at \u003cstrong\u003e120PSI\u003c\/strong\u003e, it automatically vents excess pressure from your compressor tank or pressure piping — protecting your equipment and workshop from over-pressurisation. Available in both \u003cstrong\u003e1\/8\" (DN6)\u003c\/strong\u003e and \u003cstrong\u003e1\/4\" (DN4)\u003c\/strong\u003e BSP male thread sizes, this is an essential replacement part for home workshops, garages, and industrial setups.\u003c\/p\u003e\n\n\u003cp\u003eMade in Mainland China.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUniversal BSP Fit:\u003c\/strong\u003e Compatible with 1\/8\" (DN6 \/ 9.5mm) and 1\/4\" (DN8 \/ 12.5mm) BSP male thread connections\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e120PSI Rated:\u003c\/strong\u003e Reliably releases pressure at 120PSI to safeguard compressor tanks and pressure vessels\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSolid Brass Construction:\u003c\/strong\u003e Corrosion-resistant brass body built to withstand demanding pneumatic environments\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact \u0026amp; Lightweight:\u003c\/strong\u003e Approx. 38mm length × 9mm diameter — easy to install in tight spaces\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBroad Application:\u003c\/strong\u003e Suitable for two-stage air compressors, pressure piping, pressure vessels, and pneumatic systems\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDirect Replacement:\u003c\/strong\u003e Drop-in replacement part for workshop and industrial compressor maintenance\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable style=\"border-collapse:collapse; width:100%;\"\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:6px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px; border:1px solid #ddd;\"\u003eBrass\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:6px; border:1px solid #ddd;\"\u003e\u003cstrong\u003ePressure Rating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px; border:1px solid #ddd;\"\u003e120 PSI\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:6px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eThread Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px; border:1px solid #ddd;\"\u003e1\/8\" BSP (DN6 = 9.5mm) \/ 1\/4\" BSP (DN8 = 12.5mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:6px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eLength\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px; border:1px solid #ddd;\"\u003eApprox. 38mm\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:6px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eDiameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px; border:1px solid #ddd;\"\u003eApprox. 9mm\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:6px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eQuantity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px; border:1px solid #ddd;\"\u003e1 piece\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:6px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eOrigin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px; border:1px solid #ddd;\"\u003eMainland China\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003ePackage Contents\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 × Air Compressor Safety Relief Valve (1\/8\" or 1\/4\" BSP, 120PSI)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eRelated Tools \u0026amp; Accessories\u003c\/h3\u003e\n\u003cp\u003eLooking to expand your workshop toolkit? Check out these related products:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/air-compressor-pressure-gauge-0-10-0-12-0-25-bar-hydraulic-diy\"\u003eAir Compressor Pressure Gauge 0-10\/0-12\/0-25 Bar | DIY Tool\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/360-bicycle-chain-cleaner-tool-gear-cleaning-kit\"\u003e360° Bicycle Chain Cleaner Tool | Bike Gear Cleaning Kit\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/electromagnetic-induction-tester-coil-motherboard-fault-detector\"\u003eElectromagnetic Induction Tester – Coil \u0026amp; Circuit Fault Detector\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.osha.gov\/personal-protective-equipment\" target=\"_blank\" rel=\"noopener\"\u003eOSHA on personal protective equipment\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What thread standard does this safety relief valve use?\u003c\/h4\u003e\n\u003cp\u003eA: This valve uses \u003cstrong\u003eBSP (British Standard Pipe)\u003c\/strong\u003e male threads, available in two sizes: \u003cstrong\u003e1\/8\" (DN6, 9.5mm)\u003c\/strong\u003e and \u003cstrong\u003e1\/4\" (DN8, 12.5mm)\u003c\/strong\u003e. Always verify your compressor's port thread size and standard before ordering to ensure a correct fit.\u003c\/p\u003e\n\u003ch4\u003eQ: At what pressure does this relief valve activate?\u003c\/h4\u003e\n\u003cp\u003eA: This valve is rated and set to activate at \u003cstrong\u003e120PSI\u003c\/strong\u003e. When system pressure reaches or exceeds this threshold, the valve automatically opens to vent excess pressure, protecting your compressor tank and connected pneumatic components.\u003c\/p\u003e\n\u003ch4\u003eQ: Is this valve suitable for two-stage air compressors?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. This brass safety relief valve is specifically designed for use on \u003cstrong\u003etwo-stage air compressors\u003c\/strong\u003e 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.\u003c\/p\u003e\n\u003ch4\u003eQ: How do I install the safety relief valve?\u003c\/h4\u003e\n\u003cp\u003eA: 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.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What thread standard does this safety relief valve use?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"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.\"}}, {\"@type\": \"Question\", \"name\": \"At what pressure does this relief valve activate?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"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.\"}}, {\"@type\": \"Question\", \"name\": \"Is this valve suitable for two-stage air compressors?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"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. 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