Pressure Relief Valves

Pressure relief valves are critical safety components in sterile air distribution piping systems. They protect equipment and maintain system integrity by automatically opening to discharge air when pressure exceeds a predetermined set point, then resealing when normal pressure is restored. This ensures continuous sterile air supply without contamination risk. The valves are typically constructed from stainless steel 316L, a material chosen for its corrosion resistance and suitability for hygienic applications. Available sizes range from DN15 to DN100, with connection types designed for sterile air piping. The set pressure is determined by the system's design and operational requirements, and must be verified for each specific application. These valves operate on a spring-loaded or weight-loaded mechanism, where a calibrated force holds the valve disc against the seat. When system pressure exceeds the set point, the force on the disc overcomes the spring or weight, lifting the disc to allow air discharge. Once pressure drops below the set point, the spring or weight reseats the disc, sealing the valve. Proper selection requires consideration of system pressure, flow capacity, and connection compatibility. Regular inspection and testing are essential to ensure reliable operation. Maintenance signals include leakage, failure to reseat, or unusual noise. Verification questions should address set pressure accuracy, response time, and material compatibility. It is important to confirm model-specific values and standards with the legal manufacturer or supplier before procurement.

Pressure relief valves operate on a spring-loaded or weight-loaded mechanism. The valve disc is held against the seat by a calibrated force. When system pressure exceeds the set pressure, the force acting on the disc overcomes the spring or weight force, lifting the disc to allow air discharge. Once pressure drops below the set point, the spring or weight force reseats the disc, sealing the valve.