Safety Relief Valve
4Pages

Safety Relief Valve Product Bulletin 72-00 E Type: SRH Purpose: Type SRH High Capacity Safety Relief Valves should be used to protect each refrigeration system pressure vessel that can be isolated by valves. In many localities state or municipal codes govern selection and installation of Relief Valves. Many are patterned after the ASME Boiler and Pressure Vessel Code and the ANSI/ASHRAE 15 Safety Code for Mechanical Refrigeration. Where no compulsory code exist, installation of Relief Valves according to this ANSI/ASHRAE Code is highly recommended. Contact Information: Parker Hannifin Corporation Refrigerating Specialties Division 2445 South 25th Avenue Broadview, IL 60155-3891 phone (708) 681-6300 fax (708) 681-6306 www.parker.com/refspec Product Features: • ANSI / ASHRAE 15 Complaint • Capacity Rating for Vapor Only • Excellent Repeatability • Suitable for Ammonia, R22, R502, R404A, R717 and other common refrigerants • All Stainless Steel Internal Parts

Type SRH High Capacity Safety Relief Valves are designed and constructed to meet the requirements of Section VIII ASME Boiler and Pressure Vessel Code and ANSI/ASHRAE 15 Code requirements and bear the ASME Code Symbol (UV). Employing proven principles of design, these Safety Relief Valves are highly reliable and dependable. Precision machined moving parts of stainless steel, and a PTFE disc prevent sticking due to corrosion or cold welding and ensure valve opening at the set pressure long after installation. They are not suitable for corrosive ambient atmospheres such as chlorine, etc....

Dimensional Information Dimensions: Inches (mm) Valve Figure 2: SRH Dimensional Cross-Section Pressure limiting devices, such as high pressure cut-outs on positive displacement compressor systems, must stop the action of the pressure imposing element at no higher than 90% of the pressure setting for the pressure relief device. For non-positive displacement compressors, the pressure limiting device, such as a high pressure cut-out, may be set at the DWP of the high side; providing, the low side is protected by a properly sized pressure relief device set to relieve pressure at low side DWP...

Safe Operation (See Bulletin RSBCV) People doing any work on a refrigeration system must be qualified and completely familiar with the system and the Refrigerating Specialties Division valves involved, or all other precautions will be meaningless. This includes reading and understanding pertinent Refrigerating Specialties Division Product Bulletins and Safety Bulletin RSB prior to installation or servicing work. Where cold refrigerant liquid lines are used, it is necessary that certain precautions be taken to avoid damage which could result from liquid expansion. Temperature increase in a...