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.

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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庫存編號 794-8316
製造零件編號ADMT503001
HK$293.18
單位
1/2 in BSP Male 16bar +99°C Hot Water - - Brass Male 1/2in BSP
RS庫存編號 389-1506
製造零件編號N-542-025 5 BAR
HK$1,681.37
單位
1 in BSP Female 5bar +195°C Air, Hot Water, Steam BSP 1 Yes Bronze Female 1in BSP
RS庫存編號 777-0349
製造零件編號CA-RS/311460
BrandAltecnic
HK$112.20
單位
1/2 in G Female 6bar +110°C Hot Water G 1/2 - Brass Female 1/2in G
RS庫存編號 389-1449
製造零件編號N-542-015 4 BAR
HK$1,108.27
單位
1/2 in BSP Female 4bar +195°C Air, Hot Water, Steam BSP 1/2 Yes Bronze Female 1/2in BSP
RS庫存編號 777-0352
製造零件編號313430
BrandAltecnic
HK$269.43
單位
1/2 in G Male 3bar +110°C Hot Water G 1/2 - Brass Male 1/2in G
RS庫存編號 389-0610
製造零件編號N-542-025 3 BAR
HK$1,682.59
單位
1 in BSP Female 3bar +195°C Air, Hot Water, Steam BSP 1 Yes Bronze Female 1in BSP
RS庫存編號 794-8432
製造零件編號PTEM550752
HK$477.27
單位
1/2 in BSP Male 7bar +95°C Hot Water - - - Male 1/4in BSP
RS庫存編號 211-0430
製造零件編號PREL101903
HK$169.89
單位
1/2 in BSP Female 3bar +140°C Hot Water BSP 1/2 - Brass Female 1/2in BSP
RS庫存編號 389-1483
製造零件編號N-542-020 4 BAR
HK$1,272.05
單位
3/4 in BSP Female 4bar +195°C Air, Hot Water, Steam BSP 3/4 Yes Bronze Female 3/4in BSP
RS庫存編號 794-8423
製造零件編號PTEM550753
HK$513.46
單位
1/2 in BSP Male 10bar +95°C Hot Water - - - Male 1/4in BSP
RS庫存編號 729-8702
製造零件編號RV-5200-30-W/K (HK)
BrandConvac
HK$2,522.15
單位
- 30psi +150°C - 10 → 32mm - - - - -
RS庫存編號 799-8872
製造零件編號482861
HK$2,102.33
單位
1 in BSP 4bar +350°C Steam BSP 1 - Stainless Steel - 1in BSP
RS庫存編號 794-8448
製造零件編號PTEM550951
HK$533.42
單位
1/2 in BSP Male 7bar +95°C Hot Water - - - Male 1/4in BSP
RS庫存編號 799-8875
製造零件編號482859
HK$2,235.51
單位
1 in BSP 2.5bar +350°C Steam BSP 1 - Stainless Steel - 1in BSP
RS庫存編號 799-8878
製造零件編號482860
HK$2,235.51
單位
1 in BSP 3bar +350°C Steam BSP 1 - Stainless Steel - 1in BSP
RS庫存編號 799-8862
製造零件編號482857
HK$2,078.73
單位
3/4 in BSP 3bar +350°C Steam BSP 1 - Stainless Steel - 3/4in BSP
RS庫存編號 389-0604
製造零件編號N-542-020 2.5 BAR
HK$1,272.05
單位
3/4 in BSP Female 2.5bar +195°C Air, Hot Water, Steam BSP 3/4 Yes Bronze Female 3/4in BSP
RS庫存編號 799-8866
製造零件編號482858
HK$2,473.38
單位
3/4 in BSP 4bar +350°C Steam BSP 1 - Stainless Steel - 3/4in BSP
RS庫存編號 799-8850
製造零件編號482855
HK$2,000.12
單位
1/2 in BSP 4bar +350°C Steam BSP 3/4 - Stainless Steel - 1/2in BSP
RS庫存編號 794-8344
製造零件編號DIFF200005
HK$245.65
單位
22 mm Metric 10bar +110°C Hot Water 22mm - Brass Female 22mm -