SAFETY RELIEF
VALVE (SRV)
A Safety Relief Valve is a critical safety device designed to control and limit pressure within a system, protecting equipment and personnel from overpressure conditions.
AUTOMATIC OVERPRESSURE PROTECTION
NORMAL
Valve remains closed below set pressure.
PRESSURE RISE
System pressure approaches the set limit.
ACTIVATION
Pressure force overcomes spring force.
RELEASE
The valve opens and safely discharges excess pressure.
RESEAT
The valve closes after pressure returns to a safe level.
PROCESS FIT & KEY VALUE
PROCESS FIT & KEY VALUE
System protection
Helps protect pressure equipment and piping from overpressure damage.
Connection flexibility
Flanged, threaded and hygienic tri-clamp configurations support different systems.
Long service life
Robust construction and superior surface finishing support industrial
service.
Automatic action
Opens and resets through the balance of process pressure and spring force.
Material options
SS316, SS304 and carbon-steel construction selected for processcompatibility
Maintenance access
Closed-bonnet spring construction supports controlled adjustment and inspection.
FEATURES & TECHNICAL RANGE
Design basis
Engineered to agreed ASME Section VIII and API 520 project requirements where specified.
Spring-loaded mechanism
Controlled spring force provides accurate pressure release at the selected set pressure.
Construction routes
Available in bar-stock and casting construction to suit size, rating and service.
Closed bonnet
Enclosed spring arrangement helps protect the adjustment mechanism from the environment.
Nitrogen testing
Performance testing with nitrogen gas can be included in the agreed inspection plan.
Surface finish
Selected finishing supports durability, cleanability and corrosion resistance.
WORKING PRINCIPLE
The valve remains closed while process pressure is below set pressure.When inlet pressure produces sufficient force on the disc to overcome the spring load, the valve opens and discharges fluid. It reseats after pressure returns to a safe level.
KEY BENEFITS
Protects systems from overpressure damage
Ensures operational safety and compliance
Automatic pressure release and resetting
Suitable for a wide range of process media
Robust construction for long service life
Low maintenance and high reliability
TECHNICAL SPECIFICATIONS
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Valve Type
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Spring Loaded Safety Relief Valve
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Size Range
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1/2 in to 4 in
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Set Pressure Range
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0.5 to 44 bar(g)
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Material of Construction
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SS316/SS304 / Carbon Steel
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Coating - Optional
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PTFE
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End Connections
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Flanged / Threaded / Tri-Clamp
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Testing Medium
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Nitrogen Gas
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Bonnet Type
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Closed Bonne
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APPLICATIONS
Steam systems
Pressure protection for compatible steam equipment and utilities.
Air & vapour lines
Compressed-air, vapour and selected gas services.
Liquid & oil systems
Compatible liquid systems with application-specific sizing.
Hydrogen gas
Special application requiring confirmed materials, leakage and discharge basis
Utility systems
Plant utility headers, receivers and pressure equipment.
Process systems
Vessels, reactors and packaged equipment where pressure safety is critical.
Need the Right VERTICAL PRESSURE VESSEL
for Your Process?
Our engineers will help you select, size and configure the ideal system for your application.
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