Hansen EZ-SRV™ Cartridge Pressure-Relief Valves protect refrigeration pressure vessels and other refrigeration system components from excessive pressure. If an abnormally high pressure occurs, the cartridge pressure-relief valve will open to relieve the excess pressure, preventing potential damage to equipment and injury to personnel. EZ-SRV™ valves are built in strict conformance with both ASME Boiler and Pressure Vessel Code requirements and ISO 4126 - Safety Devices for Protection of Excessive Pressure.
Each valve bears the ASME code symbol of certification (UV) and CE mark. Valve capacities are rated by the National Board of Boiler and Pressure Vessel Inspectors (NB). Refrigeration pressure-relief valves are recommended for replacement at least every five years. However, if a relief valve has discharged, it must be replaced as soon as possible. Valve replacement with the Hansen EZ-SRV™ is fast and easy - saving significant time and expense compared to traditional relief valves. The revolutionary design allows for quick, easy replacement of the cartridge with no need to disconnect from the relief piping.
The Hansen EZ-Fitting is available with welded or threaded end connections and a ¼˝ NPT connection. An optional Hansen Gauge Valve can be installed with a tell-tale pressure gauge to indicate overpressure of a valve and whether pressure is present when servicing or troubleshooting system. The gauge valve can also be used to safely bleed-off residual ressure between a three-way manifold valve and the EZ-SRV™ valve.
Key Features – EZ-SRV
Revolutionary cartridge design allows for quick and easy replacement - no need to disconnect from piping
Significant time and cost savings compared to replacement of traditional relief valves
Capacities match existing Hansen H5600 "R" series relief valves
EZ-Fittings have a built in gauge port to facilitate safer and controlled servicing
Low blowdown (15% or less) for gas service minimizes refrigerant loss
EZ-Adapter component for simple retrofit to existing Hansen relief valves
EZLQ Liquid Rated Relief Valve available
Hansen EZ-SRV™ cartridge pressure-relief valves are typically installed on pressure vessels to protect from overpressure and comply with the requirements of ANSI/ASHRAE Standard 15-2007 Safety Standard for Refrigeration Systems and European Pressure Equipment Directive (PED) requirements. Once installed, a properly selected Hansen Z-SRV™ cartridge pressure-relief valve will vent to atmosphere excessive overpressure and quickly reseat to minimize loss of refrigerant. Optional Hansen Rupture Disc Assemblies (RDAs) help indicate when a pressure-relief valve has discharged. Rupture discs remain open after bursting and if installed with a pressure gauge or switch (required by code), will rovide a visual or electronic indication of the occurrence.
For liquid relief, Hansen offers the EZLQ liquid relief valve, rated U.S. GPM. Typical applications include ASME vessels, oil coolers and other components that can be isolated by ontrol valves or manual shut-off valves.
Quick, easy repalcement
EZ-SRV™ valves offer the same reduced capacities as Hansen H5600 "R" series relief valves. The Hansen EZ-Adapter simplifies retrofitting of existing Hansen relief valves. The Z-Adapter provides the same centerline dimensions as the H5600 series relief valve installed with a 2˝ long nipple, thereby minimizing piping changes to discharge line connections.
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Hansen Technologies is a global leader in designing and manufacturing components for large industrial and commercial refrigeration systems. Our success results from high-quality, innovative products, exceptional customer service, and unequaled expertise in the refrigeration industry.
In over twenty years of growth, Hansen's knowledgeable engineering staff has continued to develop original and essential products to meet the needs of our valued customers. Hansen Technologies became the true pioneer and idea generator for modern industrial refrigeration non-condensable gas (air) purging equipment with the development of the AUTO-PURGER ® AP08 in 1984. The company pioneered continuous level sensing when Hansen introduced Vari-Level ® probes to the refrigeration industry in 1988. Since then, Hansen continuous level controls have become an industry standard. Most recently, Hansen Technologies has introduced the Hansen Sealed Motor Valve which can be controlled by a 4-20mA signal. We are currently expanding into the CO2 refrigeration market.
More innovative products are on the horizon at Hansen Technologies. Get to know us and learn how our high standards, extensive product line, and capabilities will better assist you with your refrigeration needs.
Hansen is a subsidiary of Roper Industries (NYSE:ROP), a diversified industrial company that produces engineered products for global niche markets.