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Fisher™ 6365 and 6358 Series Pilots
Fisher 6365 and 6358 Series pilots are typically used with one or several different main valves in pressure relief and backpressure applications.
All of these pilots can be used in gas or liquid service.
Fisher™ 6365 and 6358 Series Pilots


Maximum Relief (Inlet) Pressure
Depends upon maximum inlet pressure for complete relief valve as specified in appropriate main valve Bulletin
Pressure Connection
1/4 NPT internal
Temperature Capability
-20 to 150°F / -29 to 66°C


  • Compatible with Multiple Main Valves
  • Adjustable Gain for Tunable Performance
  • Low Buildup?6358 Series relief valve pilots reduce the buildup required to protect system from overpressure.