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Fisher™ Type Y693 Gas Blanketing Regulator
Type Y693 is a direct-operated regulator used for accurate pressure control on low-pressure blanketing systems.
This unit features a balanced valve plug which allows for accuracy classes equivalent to a pilot-operated regulator.
Fisher™ Type Y693 Gas Blanketing Regulator


Body Sizes and End Connection Styles
Cast Iron:
  NPS 1-1/2, NPT
  NPS 2 / DN 50 NPT, CL125 FF, or CL250 RF
Steel or Stainless Steel:
  NPS 1-1/2 or 2 / DN 40 or 50, NPT, SWE, CL150 RF, CL300 RF, or PN 16/25/40
Temperature Capabilities
NBR: -20° to 180°F / -29° to 82°C
FKM: 40° to 300°F / 4° to 149°C
FFKM: -20 to 300°F / -29 to 149°C
Maximum Inlet Pressure
150 psig / 10.3 bar
Maximum Outlet Pressures
Operating: 2 psig / 0,14 bar above outlet pressure setting
Emergency Casing: 15 psig / 1,0 bar
Outlet Pressure Ranges
0.5-inch w.c. to 10 psig / 1 mbar to 0,69 bar in 10 ranges
Pressure Registration
Additional Technical Data
For additional technical information, contact your local Sales Office or refer to technical documentation.


  • In-Line Inspection and Maintenance
  • Accuracy of Control
  • Insensitive to Inlet Pressure Fluctuations
  • Fast Speed of Response
  • High Flow Capacities
  • Balanced Trim Design