Pressure Relief Valves

Where pressure overload might lead to catastrophic failure in a system, pressure relief valves are essential. The pressure valves, or PRVs, work by opening when a pressure limit has been reached, and diverting either gas, liquid or liquid-gas mixtures away from the system. How this is achieved depends on the system, but it usually relies on the medium following the path of least resistance offered by the relief valve, and then being disposed of accordingly. Diverted gas might be released into the atmosphere or burned off, and liquids may be diverted into storage or run off.

Once a satisfactory equilibrium has been achieved within the system, the pressure relief valve will then close again until needed. These safety valves are vital components in high pressure systems, as pressure build up can lead to anything from equipment inefficiency and failure, to explosion or fire risk.

PRV or PSV?

Pressure relief valves operate in a similar manner to pressure safety valves, and the two terms are sometimes used interchangeably. However, the key difference is that PRVs operate gradually to regulate pressure, while PSVs operate very quickly to counteract sudden pressure spikes. To this end PRVs are more commonly used in liquid systems, and PSVs are more commonly used in gas systems.

Applications

Pressure relief valves are found in a variety of work environments and equipment types, and are integral to workplace safety. RS Components supplies quality pressure relief valves from leading brands, to support your application.

Hot Water Systems

As water can expand at 3% of its volume, depending on how much it is heated from room temperature, pressure relief valves are common in hot water systems and boilers, both in domestic and commercial installations. To ensure your hot water flow is smooth and uninterrupted, PRVs are needed to relieve unnecessary pressure in central heating systems.

Gas Systems

Pressure regulation is vital wherever gas powered tools and equipment are used. Overpressure is a potentially catastrophic risk when gas cylinders are employed, so you will find some kind of pressure relief valve wherever gas powered systems are installed, from factory floors to beer cellars.

...
Read more Read less

Filters

Viewing 1 - 20 of 28 products
Results per page
Description Price Connection Maximum Set Pressure Maximum Temperature For Use With Exhaust Port Size Lockable Body Material Connection Gender Thread Size Thread Standard or Connection Type
RS Stock No. 246-3289
BrandRS PRO
PHP3,215.78
Each
units
22 mm Compression 3bar +110°C Heating Systems up to 6 bar static pressure BSP 3/4 Yes Brass Female 3/4in Compression
RS Stock No. 389-0604
Mfr. Part No.N-542-020 2.5 BAR
PHP10,234.48
Each
units
3/4 in BSP Female 2.5bar +195°C Air, Hot Water, Steam BSP 3/4 Yes Bronze Female 3/4in BSP
RS Stock No. 794-8423
Mfr. Part No.PTEM550753
PHP3,361.79
Each
units
1/2 in BSP Male 10bar +95°C Hot Water - - - Male 1/4in BSP
RS Stock No. 799-8850
Mfr. Part No.482855
PHP12,694.88
Each
units
1/2 in BSP 4bar +350°C Steam BSP 3/4 - Stainless Steel - 1/2in BSP
RS Stock No. 211-0446
Mfr. Part No.PREL101913
PHP1,462.99
Each
units
3/4 in BSP Female 3bar +140°C Hot Water BSP 3/4 - Brass Female 3/4in BSP
RS Stock No. 777-0352
Mfr. Part No.313430
BrandAltecnic
PHP1,805.06
Each
units
1/2 in G Male 3bar +110°C Hot Water G 1/2 - Brass Male 1/2in G
RS Stock No. 794-8344
Mfr. Part No.DIFF200005
PHP1,471.79
Each
units
22 mm Metric 10bar +110°C Hot Water 22mm - Brass Female 22mm -
RS Stock No. 389-1506
Mfr. Part No.N-542-025 5 BAR
PHP13,978.06
Each
units
1 in BSP Female 5bar +195°C Air, Hot Water, Steam BSP 1 Yes Bronze Female 1in BSP
RS Stock No. 777-0349
Mfr. Part No.CA-RS/311460
BrandAltecnic
PHP814.56
Each
units
1/2 in G Female 6bar +110°C Hot Water G 1/2 - Brass Female 1/2in G
RS Stock No. 799-8869
Mfr. Part No.482856
PHP13,918.82
Each
units
3/4 in BSP 2.5bar +350°C Steam BSP 1 - Stainless Steel - 3/4in BSP
RS Stock No. 389-1461
Mfr. Part No.N-542-020 3 BAR
PHP10,153.31
Each
units
3/4 in BSP Female 3bar +195°C Air, Hot Water, Steam BSP 3/4 Yes Bronze Female 3/4in BSP
RS Stock No. 211-0430
Mfr. Part No.PREL101903
PHP1,125.01
Each
units
1/2 in BSP Female 3bar +140°C Hot Water BSP 1/2 - Brass Female 1/2in BSP
RS Stock No. 389-1483
Mfr. Part No.N-542-020 4 BAR
PHP11,871.82
Each
units
3/4 in BSP Female 4bar +195°C Air, Hot Water, Steam BSP 3/4 Yes Bronze Female 3/4in BSP
RS Stock No. 794-8457
Mfr. Part No.PTEM550755
PHP5,290.21
Each
units
1/2 in BSP Male 10bar +95°C Hot Water - - - Male 1/4in BSP
RS Stock No. 389-1449
Mfr. Part No.N-542-015 4 BAR
PHP8,916.96
Each
units
1/2 in BSP Female 4bar +195°C Air, Hot Water, Steam BSP 1/2 Yes Bronze Female 1/2in BSP
RS Stock No. 794-8316
Mfr. Part No.ADMT503001
PHP1,868.56
Each
units
1/2 in BSP Male 16bar +99°C Hot Water - - Brass Male 1/2in BSP
RS Stock No. 389-0597
Mfr. Part No.N-542-015 3 BAR
PHP8,852.34
Each
units
1/2 in BSP Female 3bar +195°C Air, Hot Water, Steam BSP 1/2 Yes Bronze Female 1/2in BSP
RS Stock No. 389-0610
Mfr. Part No.N-542-025 3 BAR
PHP13,508.24
Each
units
1 in BSP Female 3bar +195°C Air, Hot Water, Steam BSP 1 Yes Bronze Female 1in BSP
RS Stock No. 799-8853
Mfr. Part No.482853
PHP12,694.88
Each
units
1/2 in BSP 2.5bar +350°C Steam BSP 3/4 - Stainless Steel - 1/2in BSP
RS Stock No. 799-8866
Mfr. Part No.482858
PHP16,114.50
Each
units
3/4 in BSP 4bar +350°C Steam BSP 1 - Stainless Steel - 3/4in BSP
Related Products
1.1 Adjustment element (grub screw) for pressure setting ...
Description:
1.1 Adjustment element (grub screw) for pressure setting and protective cap,2. Valve fixing holes ,3. Optional connection port P. (e.g. for pressure measuring) ,P Pressure or pump port ,T Tank or return port. Suitable for Mineral Oils (HL, HLP) to ...
AMC uses three basic components to provide the ...
Description:
AMC uses three basic components to provide the multi-functionality to perform duties formerly requiring a wide range of different instruments: the basic component is an ultra-compact, electrical, frequency and temperature calibrator, which provides simultaneous measurement and source capabilities; interchangeable ...
Protects air-operated equipment from over pressureTemperature range -34°C ...
Description:
Protects air-operated equipment from over pressureTemperature range -34°C to +65°C/80°C (72//74)Push-to-lock adjusting knob, optional tamper proof coverQuick clamp required.
Protects compressed air systems from over pressurisationLow torque ...
Description:
Protects compressed air systems from over pressurisationLow torque push-to-lock adjustment knobCompact designPanel mount dimensions (30mm dia. hole 6mm panel thickness maximum) or bracket mountingRelief pressure adjustment range 0.3 to 9 barZinc alloy body.