When system pressure rises and reaches the set point, the pilot will cut off flow to the dome, causing depressurization in the piston's dome side. When the pressure is below the maximum amount, the pressure differential is slightly positive on the piston's dome size, which keeps the main valve in the closed position. The valves allow media to flow from an auxiliary passage and out of the system once absolute pressure is reached, whether it is a maximum or minimum level. In normal operating conditions, system pressure will prevent the main valve from opening. System pressure is fed from the inlet into and through the pilot control and ultimately into the main valve's dome. This pilot control dictates the opening and closing of the main valve and responds to system pressure. Pilot-operated relief valves operate by combining the primary relieving device (main valve) with self-actuated auxiliary pressure relief valves, also known as the pilot control. Spring-loaded valves can either be conventional spring-loaded or balanced spring-loaded. Such as oil and gas, power generation like central heating systems, and multi-phase applications in refining and chemical processing.Īt Curtiss-Wright, we provide a range of different pressure relief valves based on two primary operations – spring-loaded and pilot operated. They're instrumental in applications where proper pressure levels are vital for correct and safe operation. Pressure relief valves are a safety valve used to keep equipment and the operators safe too. Farris 3880 Pilot Operated Pressure Relief Valve:Īir pressure relief valves can be applied to a variety of environments and equipment.
The pressure relief valve would then discharge the pressurized fluid or gas to flow from an auxiliary passage out of the system.īelow is an example of one of our pilot operated pressure relief valves in action the cutaway demonstrates when high pressure is released from the system. Once an overpressure event occurs in the system, the pressure relief valve detects pressure beyond its design's specified capability. How does a pressure relief valve work?Ī pressure relief valve is designed to withstand a maximum allowable working pressure (MAWP).
It protects the system and keeps the people operating the device safely in an overpressure event or equipment failure. Air Pressure Relief Valves: Purpose & functionality.Ī pressure relief valve is a type of safety valve designed to control the pressure in a vessel.
0 kommentar(er)
