Safety Valves
Shop safety relief valves for compatible air compressors, air receivers and compressed-air equipment, including selected 4.5 bar and 11 bar options across common BSP connection sizes.
Safety Relief Valves for Compressors & Air Receivers
Safety valves provide overpressure protection by automatically relieving pressure when the valve reaches its specified set pressure.
The current range includes five safety-valve options, with 4.5 bar and 11 bar settings across selected 1/4", 3/8", 1/2" and 3/4" BSP connections.
Correct selection is critical: set pressure, relieving capacity, connection specification and the equipment being protected all need to be considered. Thread size alone is not enough.
Shop Compressed-Air Safety Valves
Browse the live range below. Product images, current pricing and stock status are pulled directly from WooCommerce.
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Safety Valves1/2″ BSP Male, Safety Relief Valve | 10mm Nominal Diameter, 11 bar (SRV) (PRV)
£73.83 exc vat. Add to basketA Tanair valve for compatible compressed air installation, maintenance or replacement work.
In Stock£73.83 exc vat. -
Safety Valves3/4″ BSP Male Safety Relief Valve | 10mm Nominal Diameter, 11 bar (SRV) (PRV)
£84.53 exc vat. Add to basketA Tanair valve for compatible compressed air installation, maintenance or replacement work.
In Stock£84.53 exc vat. -
Safety Valves3/8″ BSP Parallel Male, Safety Relief Valve | 10mm Nominal Diameter, 11 bar (SRV)
£63.13 exc vat. Add to basketA Tanair valve for compatible compressed air installation, maintenance or replacement work.
In Stock£63.13 exc vat. -
Sale!
Safety ValvesF-047086000 | Safety Valve 6 Bar, 1/4″ – With Ring Pull
Original price was: £19.69.£13.64Current price is: £13.64. exc vat. Add to basketSafety Valve – 6 bar, 1/4″ – with ring pull. Compressed-air safety relief valve identified by manufacturer reference F-047086000. Designed to provide pressure relief protection where the stated set pressure and connection match the equipment requirement; confirm set pressure, thread size, certificate or ring-pull requirement and the exact manufacturer reference before ordering.
In StockOriginal price was: £19.69.£13.64Current price is: £13.64. exc vat. -
Safety Valvesprv-1-4-4.5 | Safety Relief Valve 1/4″ Male Bsp 4.5 Bar (SRV) *Fits Intercooler Pipe
£38.56 exc vat. Add to basket1/4" male BSP 4.5 bar safety relief valve identified for compatible compressor intercooler pipe applications. Confirm the original valve pressure and thread before replacement.
In Stock£38.56 exc vat. -
Safety ValvesPRV-14-11 | Safety Relief Valve 1/4″ Male Bsp 11 Bar (SRV) No Ring
£41.00 exc vat. Add to basket1/4″ male BSP safety relief valve with an 11 bar set-pressure designation and no pull ring. Replacement safety component for compatible compressed-air equipment; confirm pressure, thread and application before ordering.
In Stock£41.00 exc vat. -
Sale!Safety Valves
S-9049020 | Safety Valve 4.5 Bar, 1/4″ – With Certificate
Original price was: £11.87.£7.83Current price is: £7.83. exc vat. Add to basketSafety Valve – 4.5 bar, 1/4 – with certificate. Compressed-air safety relief valve identified by manufacturer reference S-9049020. Designed to provide pressure relief protection where the stated set pressure and connection match the equipment requirement; confirm set pressure, thread size, certificate or ring-pull requirement and the exact manufacturer reference before ordering.
In StockOriginal price was: £11.87.£7.83Current price is: £7.83. exc vat. -
Sale!Safety Valves
S-9049067 | Safety Valve 15 Bar, 3/4″ – With Ring Pull
Original price was: £81.92.£69.63Current price is: £69.63. exc vat. Add to basketSafety Valve – 15 bar, 3/4″ – with ring pull. Compressed-air safety relief valve identified by manufacturer reference S-9049067. Designed to provide pressure relief protection where the stated set pressure and connection match the equipment requirement; confirm set pressure, thread size, certificate or ring-pull requirement and the exact manufacturer reference before ordering.
In StockOriginal price was: £81.92.£69.63Current price is: £69.63. exc vat. -
Sale!Safety Valves
S-9049179 | Safety Valve 30 Bar, 1/4″ With Certificate
Original price was: £37.92.£32.23Current price is: £32.23. exc vat. Add to basketSafety Valve – 30 bar, 1/4″ with certificate. Compressed-air safety relief valve identified by manufacturer reference S-9049179. Designed to provide pressure relief protection where the stated set pressure and connection match the equipment requirement; confirm set pressure, thread size, certificate or ring-pull requirement and the exact manufacturer reference before ordering.
In StockOriginal price was: £37.92.£32.23Current price is: £32.23. exc vat. -
Sale!Safety Valves
S-9049184 | Safety Valve 16.5 Bar, 1/4″ – With Certificate
Original price was: £20.99.£15.13Current price is: £15.13. exc vat. Add to basketSafety Valve – 16.5 bar, 1/4 – with certificate. Compressed-air safety relief valve identified by manufacturer reference S-9049184. Designed to provide pressure relief protection where the stated set pressure and connection match the equipment requirement; confirm set pressure, thread size, certificate or ring-pull requirement and the exact manufacturer reference before ordering.
In StockOriginal price was: £20.99.£15.13Current price is: £15.13. exc vat. -
Sale!Safety Valves
S-9049212 | Safety Valve 11 Bar, 3/4″ – With Certificate
Original price was: £94.22.£72.50Current price is: £72.50. exc vat. Add to basketSafety Valve – 11 bar, 3/4 – with certificate. Compressed-air safety relief valve identified by manufacturer reference S-9049212. Designed to provide pressure relief protection where the stated set pressure and connection match the equipment requirement; confirm set pressure, thread size, certificate or ring-pull requirement and the exact manufacturer reference before ordering.
In StockOriginal price was: £94.22.£72.50Current price is: £72.50. exc vat. -
Sale!Safety Valves
S-9049300 | Safety Valve 11 Bar, 1/2″ With Certificate
Original price was: £18.74.£13.33Current price is: £13.33. exc vat. Add to basketSafety Valve – 11 bar, 1/2″ with certificate. Compressed-air safety relief valve identified by manufacturer reference S-9049300. Designed to provide pressure relief protection where the stated set pressure and connection match the equipment requirement; confirm set pressure, thread size, certificate or ring-pull requirement and the exact manufacturer reference before ordering.
In StockOriginal price was: £18.74.£13.33Current price is: £13.33. exc vat. -
Sale!Safety Valves
S-9049304 | Safety Valve 11 Bar, 1/4″ – With Certificate
Original price was: £19.41.£11.42Current price is: £11.42. exc vat. Add to basketSafety Valve – 11 bar, 1/4 – with certificate. Compressed-air safety relief valve identified by manufacturer reference S-9049304. Designed to provide pressure relief protection where the stated set pressure and connection match the equipment requirement; confirm set pressure, thread size, certificate or ring-pull requirement and the exact manufacturer reference before ordering.
In StockOriginal price was: £19.41.£11.42Current price is: £11.42. exc vat. -
Sale!Safety Valves
S-9049305 | Safety Valve 14 Bar, 1/4″ – With Certificate
Original price was: £19.41.£11.42Current price is: £11.42. exc vat. Add to basketSafety Valve – 14 bar, 1/4 – with certificate. Compressed-air safety relief valve identified by manufacturer reference S-9049305. Designed to provide pressure relief protection where the stated set pressure and connection match the equipment requirement; confirm set pressure, thread size, certificate or ring-pull requirement and the exact manufacturer reference before ordering.
In StockOriginal price was: £19.41.£11.42Current price is: £11.42. exc vat. -
Sale!Safety Valves
S-9049307 | Safety Valve 11 Bar, 3/8″ With Certificate
Original price was: £20.02.£14.35Current price is: £14.35. exc vat. Add to basketSafety Valve – 11 bar, 3/8″ with certificate. Compressed-air safety relief valve identified by manufacturer reference S-9049307. Designed to provide pressure relief protection where the stated set pressure and connection match the equipment requirement; confirm set pressure, thread size, certificate or ring-pull requirement and the exact manufacturer reference before ordering.
In StockOriginal price was: £20.02.£14.35Current price is: £14.35. exc vat. -
Sale!Safety Valves
S-9049309 | Safety Valve 14 Bar, 3/4″ With Certificate
Original price was: £14.55.£10.83Current price is: £10.83. exc vat. Add to basketSafety Valve – 14 bar, 3/4″ with certificate. Compressed-air safety relief valve identified by manufacturer reference S-9049309. Designed to provide pressure relief protection where the stated set pressure and connection match the equipment requirement; confirm set pressure, thread size, certificate or ring-pull requirement and the exact manufacturer reference before ordering.
In StockOriginal price was: £14.55.£10.83Current price is: £10.83. exc vat. -
Sale!Safety Valves
S-9049310 | Safety Valve 15 Bar, 3/8″ – With Certificate
Original price was: £23.86.£18.33Current price is: £18.33. exc vat. Add to basketSafety Valve – 15 bar, 3/8 – with certifcate. Compressed-air safety relief valve identified by manufacturer reference S-9049310. Designed to provide pressure relief protection where the stated set pressure and connection match the equipment requirement; confirm set pressure, thread size, certificate or ring-pull requirement and the exact manufacturer reference before ordering.
In StockOriginal price was: £23.86.£18.33Current price is: £18.33. exc vat. -
Sale!Safety Valves
S-9049316 | Safety Valve 8 Bar, 1/4″ – With Certificate
Original price was: £19.41.£11.90Current price is: £11.90. exc vat. Add to basketSafety Valve – 8 bar, 1/4 – with certificate. Compressed-air safety relief valve identified by manufacturer reference S-9049316. Designed to provide pressure relief protection where the stated set pressure and connection match the equipment requirement; confirm set pressure, thread size, certificate or ring-pull requirement and the exact manufacturer reference before ordering.
In StockOriginal price was: £19.41.£11.90Current price is: £11.90. exc vat. -
Sale!Safety Valves
S-9049317 | Safety Valve 15 Bar, 3/4″ – With Certificate
Original price was: £94.22.£72.50Current price is: £72.50. exc vat. Add to basketSafety Valve – 15 bar, 3/4 – with certificte. Compressed-air safety relief valve identified by manufacturer reference S-9049317. Designed to provide pressure relief protection where the stated set pressure and connection match the equipment requirement; confirm set pressure, thread size, certificate or ring-pull requirement and the exact manufacturer reference before ordering.
In StockOriginal price was: £94.22.£72.50Current price is: £72.50. exc vat. -
Sale!Safety Valves
S-9049320 | Safety Valve 10 Bar, 1/4″ – With Certificate
Original price was: £20.49.£15.83Current price is: £15.83. exc vat. Add to basketSafety Valve – 10 bar, 1/4 – with certificate. Compressed-air safety relief valve identified by manufacturer reference S-9049320. Designed to provide pressure relief protection where the stated set pressure and connection match the equipment requirement; confirm set pressure, thread size, certificate or ring-pull requirement and the exact manufacturer reference before ordering.
In StockOriginal price was: £20.49.£15.83Current price is: £15.83. exc vat. -
Sale!Safety Valves
S-9412843 | Safety Valve 10 Bar, 1/4″ – With Ring Pull
Original price was: £19.41.£16.50Current price is: £16.50. exc vat. Add to basketSafety Valve – 10 bar, 1/4 – with ring pull. Compressed-air safety relief valve identified by manufacturer reference S-9412843. Designed to provide pressure relief protection where the stated set pressure and connection match the equipment requirement; confirm set pressure, thread size, certificate or ring-pull requirement and the exact manufacturer reference before ordering.
In StockOriginal price was: £19.41.£16.50Current price is: £16.50. exc vat.
How to Select the Correct Safety Valve
Similar-looking valves are not automatically interchangeable. The complete specification must suit the equipment being protected.
Set Pressure
The set pressure must be appropriate for the maximum allowable pressure of the compressor, air receiver or protected system component.
Relieving Capacity
The safety valve must have sufficient discharge capacity for the pressure source and equipment it protects.
Connection
Confirm BSP size, male or female arrangement, thread form and installation requirements before ordering.
Application
Confirm whether the valve protects an air receiver, compressor stage, intercooler or another pressure-containing component.
What Does a Compressed-Air Safety Valve Do?
A safety valve is designed to open automatically when pressure reaches its set point, allowing compressed air to discharge and helping prevent pressure from continuing to rise beyond the intended limit.
When system pressure falls sufficiently, the valve is designed to reclose. It is a protective device rather than a normal pressure-control valve.
Safety Valves for Air Receivers
Air receivers require suitable protection against excessive pressure. The installed valve must be correctly specified for the receiver and have adequate relieving capacity for the connected pressure source.
A higher-pressure valve should not be fitted simply because it prevents an existing valve from lifting. The receiver rating and wider system requirements must remain the basis for selection.
Safety Valve Inspection
- Check for visible damage or corrosion
- Inspect for persistent air leakage
- Ensure pressure and identification markings remain legible
- Keep the discharge outlet unobstructed
- Do not alter or adjust the valve to increase its set pressure
- Replace damaged or unsuitable valves with correctly specified components
Need Help Identifying a Replacement?
If replacing an existing safety valve, send as much information as possible from both the valve and the equipment it protects.
- Existing valve part or reference number
- Set pressure marked on the valve
- Thread size and connection type
- Nominal valve diameter where stated
- Compressor or air-receiver manufacturer
- Equipment model and serial number
- Maximum allowable pressure where known
- Clear photographs of the valve and equipment data plate
Safety Valve FAQs
What is the purpose of a compressed-air safety valve?
It is designed to automatically relieve excess pressure when the system reaches the valve's set pressure, helping protect pressure-containing equipment from overpressure.
Can I replace a safety valve with one that has the same thread size?
Not without confirming the set pressure, relieving capacity, connection specification and application. Thread size alone does not establish suitability.
Can I fit a higher-pressure valve to stop the existing valve lifting?
No. A higher-pressure valve should not be fitted simply to prevent lifting. Repeated lifting can indicate an overpressure or control problem that should be investigated.
What pressure settings are available in this range?
The current range includes selected 4.5 bar and 11 bar safety-valve options.
What BSP sizes are available?
The current range includes selected 1/4", 3/8", 1/2" and 3/4" BSP safety valves.
Can Compressed Air Systems UK help identify a replacement safety valve?
Yes. Provide the existing valve reference, set pressure, connection size, equipment model and serial number, plus clear photographs where possible.
Should the equipment be depressurised before replacing a safety valve?
Yes. The equipment must be safely isolated and fully depressurised before a safety valve is removed or replaced.
Need Help Choosing the Correct Safety Valve?
Send us the existing valve reference, set pressure, thread size and equipment details and our team can help identify the appropriate replacement.
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