Refrigeration system pressure relief valve 52xx, 56xx, 53xx series

plug

The main function of a Pressure Relief Valve is to protect against accidental over-pressure of a pressure vessel due to system malfunction or fire. Applications Hemy Technologies’ Relief Valves are designed to be used in refrigeration systems to preventover-pressuredueto system malfunction or excessive external heat. They are fo be used only wilh refrigerant vapor or gas, where they are typically installed on the top section of a pressure vessel, i.e. liquid receiver or sucfion accumulator. Most states and municipalities which have refrigeration safety codes conform to the “American Standard Safety Code for Mechanical Refrigeration (ANSI/ASHRAE 15)*. This code and AS ME states fiat the Relief Valve settng is not to exceed the design working pressure of the vessel on which the Relief Valve is installed. The discharge capacity of relief valves varies with pressure setting. The discharge csipacity required is based on the size of the vessel and the refrigerant used. See “Determining Minimum Required Discharge Capacity" section for more information, or contact Technical Supportat 1-100-627-5148. Whenever conditions permit, it is highly advisable to have the Relief Valve pressure setting (which must not exceed the design working pressure of the vessel) at least 25% higher than the normal operating pressure for the refrigerant used. 52series Pressure Relief Valves are suitable fa use with HCFC and HFC refrigerants and their associated oils, as well as other industrial fluids non-corrosive to brass, steel and Teflon. 53and 56 series Pressure Relief Valves are suitable for use with ammonia, HCFC and HFC refrigerants and their associated oils,