Pressure Relief and Sustaining Valve
Pressure Relief and Sustaining Valves are types of valves used in various industrial processes to control and regulate pressure levels.

A Pressure Relief Valve (PRV) is designed to automatically open and release excess pressure when the pressure inside a system or vessel exceeds a set limit. This is important to prevent overpressure situations that can cause equipment damage, product spills, or even explosions. The PRV typically opens at a predetermined pressure and then closes once the pressure has been reduced to a safe level.

A Sustaining Valve, on the other hand, is designed to maintain a set pressure level within a system or vessel by automatically adjusting the flow of fluid into the system. The valve will open or close in response to changes in pressure, maintaining a constant pressure level regardless of changes in flow rate or upstream pressure. This is important in processes where consistent pressure levels are critical for product quality, safety, or equipment performance.

Pressure Relief and Sustaining Valves can be used in a wide range of applications, including oil and gas, chemical processing, power generation, and water treatment. They are designed to ensure safe and efficient operation of industrial processes, protecting equipment and personnel from potential hazards associated with overpressure or under pressure situations.

Parts

Body
Inlet and Outlet Connections
Disc or Seat
Spring
Diaphragm or Piston
Bonnet or Cover
Adjusting Screw
Gaskets and O-rings
Locking Device
These are just some of the common parts of a Pressure Relief and Sustaining Valve. The exact configuration and materials used can vary depending on the application and manufacturer.

Advantages

Pressure Relief and Sustaining Valves play a crucial role in ensuring safe operation of industrial processes by preventing overpressure situations that can cause equipment damage, product spills, or even explosions.
Sustaining Valves can help maintain a constant pressure level within a system, regardless of changes in flow rate or upstream pressure. This can improve the efficiency of the process and reduce energy consumption.
By preventing overpressure situations, Pressure Relief Valves can help avoid costly equipment damage and downtime. Sustaining Valves can also reduce maintenance costs by ensuring consistent pressure levels that can extend the life of the equipment.
Pressure Relief and Sustaining Valves can help industrial processes comply with safety regulations and standards, which is important in industries such as oil and gas, chemical processing, and power generation.

Industries

Chemical and petrochemical industry
Oil and gas industry
Water and wastewater treatment
Power generation
Mining industry
Aerospace and defense
Construction and building services