16 - 18 October 2018 // Nuremberg

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Zoom product LOGO_EZ-SRV Cartridge Relief Valve

EZ-SRV Cartridge Relief Valve

LOGO_EZ-SRV Cartridge Relief Valve

EZ-SRV Cartridge Relief Valve

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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
  • Optional welded connections eliminate threaded joint leak potential
  • 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

Applications

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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EZ-SRV Cartridge Relief Valve is assigned to following product groups:

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