Bronze, steel, stainless steel safety relief valves for air, gas, steam, liquid and vacuum systems. The nozzle is designed with a hexagonal shape for easy installation. The single adjustment ring is adopted to facilitate the adjustment of the opening and closing pressure difference. Pivot disc design for superior valve seat alignment. The seat is precisely ground to achieve optical flatness. The guide to the nozzle is designed to reduce friction. Models 920, 921 and 927 are certified according to ASME Part 1 - Special Requirements. The temperature of the 916, 917, 918, and 919 O-ring soft seat valves is limited by the material of the soft seat. Suitable for FM fire pump service.
 
Application range
●Air/Gas Compressor
● Liquid filled pressure vessel / system - ASME VIII [UV] points
● High temperature / pressure hot water boiler - ASME part 1 [V] part
● Pressure vessel - contains gas, air or steam
●Requires the technical and industrial use of steel/stainless steel structures
●Optional elastic soft seat with good leak-free performance
●Vacuum Application
 
Technical data
Size range:
1/2″ to 2″ [15 to 50mm]
Pressure Limit:
910:1400 psig [96.5 barg]
911:1400 psig [96.5 barg]
912:300 psig [17.2 barg]
913:1400 psig [96.5 barg]
Temperature Limit:

800°F[427°C]steel/stainless steel trim
800°F[427°C]All Stainless Steel
406°F[208°C]Bronze/Brass Trim
425°F[219°C]Bronze/Stainless Steel Trim
Standard:

ASME VIII, ASMEI