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). 800 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). 800 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). 800 psig maximum set pressure.

Pressure and Temperature Limits
See Catalog PDF for Pressure and Temperature Limits

Applications

  • Air/gas compressors, intercoolers, aftercoolers
  • Liquid filled pressure vessels/systems, ASME Section VIII (UV).
  • Pressure vessels - containing gas, air, liquid or steam, including tanks and receivers.
  • Vacuum systems including pumps, tanks and equipment.
  • Oil/gas separators.
  • Overpressure relief and protection of pumps, tanks, lines and hydraulic systems.
  • Bypass relief or pressure regulation.
  • All stainless steel Model 911 valves may be suitable for sanitary/edible applications.

Options

  • Threaded cap
  • Threaded cap with gag
  • Plain lever
  • Plain lever with gag
  • Plain lever with vibration dampener
  • Packed lever
  • Packed lever
  • Packed lever with gag

Features and Benefits

  • Available with soft seats.
  • Threaded cap standard (back pressure tight). Maximum back pressure 50 psig [3.4 barg].
  • Hex on valve nozzle provides for easy installation.
  • Single control ring offers easy adjustment of blowdown.
  • Pivoting disc design offers exceptional seat alignment.
  • Guide to nozzle ratio reduces friction.
  • Valve bodies are heavy duty castings.
  • Full nozzle design for optimum flow performance.
  • Threaded side outlet for piped off discharge to eliminate fugitive emissions.
 

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