The principle type of device used to prevent overpressure in plant is the safety or safety relief valve. The safety valve operates by releasing a volume of fluid from within the plant when a predetermined maximum pressure is reached, thereby reducing the excess pressure in a safe manner. As the safety valve may be the only remaining device to prevent catastrophic failure under overpressure conditions, it is important that any such device is capable of operating at all times and under all possible conditions.
Safety valves should be installed wherever the maximum allowable working pressure (MAWP) of a system or pressure-containing vessel is likely to be exceeded. In steam systems, safety valves are typically used for boiler overpressure protection and other applications such as downstream of pressure reducing controls. Although their primary role is for safety, safety valves are also used in process operations to prevent product damage due to excess pressure. Pressure excess can be generated in a number of different situations, including:
- An imbalance of fluid flowrate caused by inadvertently closed or opened isolation valves on a process vessel.
- Failure of a cooling system, which allows vapour or fluid to expand.
- Compressed air or electrical power failure to control instrumentation.
- Transient pressure surges.
- Exposure to plant fires.
- Heat exchanger tube failure.
- Uncontrollable exothermic reactions in chemical plants.
- Ambient temperature changes.




This PRV works exactly as expected. The pressure remains stable, and the build quality looks strong. I’ve been using it for a few weeks now, and it hasn’t given me any trouble.
Really happy with this PRV. It manages the pressure very smoothly, and the installation process was simple. It’s a reliable product for regular industrial operations.
I found this PRV very efficient. It holds the pressure consistently and feels durable. It’s definitely worth buying if you need something dependable for your setup.
Good quality PRV with stable pressure control. The design is user-friendly, and it performs well even under heavy use. I would recommend it to others.
This PRV has been working great so far. The pressure regulation is accurate, and the material feels strong. It’s a good fit for my industrial requirements.