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Features:

Temperature Range: -40°F/300°F, -40°C/149°C

Designed primarily for use on liquid receiver applications above the liquid refrigerant level (it is recommended that the factory be consulted before the valves are used on other applications)

Satisfy ASHRAE Standard 15 code requirements for a refrigerant vessel safety device (Application information can also be found in ASHRAE Guide and Data Book)

Comply with ASME code for unfired pressure vessels Discharge rates are certified by National Board of Boiler & Pressure Vessel Inspectors

Designed for maximum discharge capacities

Conforms to Pressure Equipment Directive 2014/68/EU, CRN, Compatible with all CFC, HCFC and HFC refrigerants and oils

CRN 0G0314.9C

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Unit of Measure

Items	B 34444 SAFETYMASTER® Pressure Relief Valves - Straight Thru - Straight Thread Inlet to NPTFI Outlet	B 34519 SAFETYMASTER® Pressure Relief Valves - Straight Thru - Straight Thread Inlet to NPTFI Outlet	B 34580 SAFETYMASTER® Pressure Relief Valves - Straight Thru - Straight Thread Inlet to NPTFI Outlet	A 18540 SAFETYMASTER® Pressure Relief Valves - Straight Thru - Straight Thread Inlet to NPTFI Outlet
Connection Size (in)	N/A 7/8 ‐ 14UNF ‐ 2A	N/A 1 5/16 ‐ 12UNF ‐ 2S	N/A 1 5/8 ‐ 12UNF ‐ 2A	N/A 7/8 ‐ 14UNF ‐ 2A
Second Connection Size	N/A 3/4 in	N/A 1 in	N/A 1 1/4 in	N/A 3/4 in
Second End Type	N/A NPTFI
Operating Pressure [Min]	N/A 150 psi
Operating Pressure [Max]	N/A 450 psi
Weight	N/A 0.69 kg1.52 lb	N/A 0.62 kg1.37 lb	N/A 0.91 kg2.00 lb	N/A 0.44 kg0.96 lb
Operating Temperature [Min]	N/A -40 ºC-40 ºF
Operating Temperature [Max]	N/A 149 ºC300 ºF
A (in)	N/A 7/8 ‐ 14UNF ‐ 2A	N/A 1 5/16 ‐ 12UNF ‐ 2S	N/A 1 5/8 ‐ 12UNF ‐ 2A	N/A 7/8 ‐ 14UNF ‐ 2A
B	N/A 0.75 in	N/A 1.00 in	N/A 1.25 in	N/A 0.75 in
C	N/A 5 in127 mm	N/A 4.38 in111 mm	N/A 5 in127 mm	N/A 3.99 in101 mm

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