Models 910, 911, 916, 917, 920, 921, 927
ASME Section VIII, Air/Gas/Steam/Liquid, 'UV' national Board Certified. Also available for vacuum service.
Model Descriptions
Model 910: CS body and bonnet with SS trim.
Model 911: All SS construction.
Model 916: Same as Model 910 except resilient seat/seals. Superior 'leak-free' performance.
Model 917: Same as Model 911 except resilient seat/seals. Superior 'leak-free' performance.
Model 920: Steel body and bonnet with screwed cap and stainless steel spring for organic fluid vaporizers (ASME Section I - 'V' Special Use or application). 1,400 psig maximum set pressure.
Model 921: Steel body and bonnet with plain lift lever and stainless steel spring for forced flow steam generators (ASME Section I - 'V' Special Use or application). 1,400 psig maximum set pressure.
Model 927: Steel body and bonnet with packed lift lever and SS spring for high temperature/pressure hot water boilers (ASME Section I - 'V' Special Use or application). 1,400 psig maximum set pressure.