EZ-SRV Cartridge Relief Valve

Hansen EZ-SRV™ car tridge pressure-relief valves typically are installed on pressure vessels to protect from overpressure. Several design codes for refrigeration systems require that pressure vessels have protection from excessive pressure. For example, Hansen cartridge pressure-relief valves comply with the requirements of ANSI/ASHRAE Standard 15 Safety Standard for Refrigeration Systems, and ANSI/IIAR 2 Equipment, Design, and Installation of Closed-Circuit Ammonia Mechanical Refrigerating Systems.

Once installed, a properly selected Hansen E Z- SRV ™ cartridge
pressure-relief valve will vent to atmosphere excessive overpressure. After discharge, these valves will quickly reseat to minimize loss of refrigerant. After discharge, relief valves must be replaced as soon as possible because debris may have settled on the seat, allowing the seat to leak out refrigerant. Hansen EZ-SRV™ valves must be installed in the vapor space above the liquid level of any vessel or component which contains liquid and vapor. (Hansen offers the EZLQ, a liquid relief valve for use with ASME rated pressure vessels and is rated U.S. GPM.)