Blast & Fire Protection Systems
Emergency Relief Valve
Release pressure in a controlled way during an overpressure condition in a system, preventing damage to the equipment.
How it works
An emergency relief valve opens when pressure in a system rises above its set value and closes again when pressure falls. It releases the excess to a safe place and protects vessels and piping from damage. The set pressure, capacity and the fluid determine the type and size of the valve.
Typical applications
- Vessels and process piping
- Pressure systems that can be overpressured by fire or process upset
- Storage and transfer installations
Standards and guidance commonly referenced for this product type
These are general references. Compliance and test reports for a specific product are provided per project.
How is a relief valve sized?
It is sized for the largest flow it may have to discharge in the worst credible case, such as a blocked outlet or an external fire, at the set pressure and the properties of the fluid. Standards such as ISO 4126 and API 520 give the calculation methods.
Technical specifications, protection levels and test reports are provided per project. Contact our engineers for details.
Planning a protected facility?
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