What is a Proportional Start Safety Valve?
A proportional start safety valve is a type of pressure relief valve designed to open and release pressure when the pressure in a system exceeds a predetermined set point. It is called a “proportional lift” valve because the amount the valve opens, or “lifts,” is proportional to the pressure exceeding the set point.
The valve consists of a spring-loaded disc held closed by a spring. When the system pressure exceeds the set point, the force of the pressure on the disc overcomes the spring force, allowing the disc to lift from its seat and release the excess pressure. The amount the disc lifts is proportional to the pressure above the set point, allowing for controlled and consistent pressure relief.
Proportional start safety valves are used in various applications, including process industries, power plants, and other systems where maintaining a safe and stable operating pressure is critical.
Where are Proportional Start Safety Valves Used?
Proportional start safety valves are used in a wide range of industrial and commercial environments to provide overpressure protection for pressure vessels, boilers, and other types of process equipment. These valves are designed to release excess pressure in a controlled manner when the system pressure exceeds a predetermined level.
They are widely used in industries such as chemical, petrochemical, oil and gas, power generation, and other sectors where the safe operation of pressurized equipment is critical. They are also employed in residential and commercial heating and cooling systems and other equipment or systems where pressure control is important. They are a key safety feature that helps prevent equipment damage and protects personnel from overpressure hazards.
General Specifications
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Body: GG-25 / GGG-40
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Cover: GG-25 / GGG-40
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Spring: AISI 302
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Seat: AISI 304
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Disc: AISI 304
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Stem: AISI 304