Fisher 133 Series direct-operated regulators are ideal for industrial and commercial applications supplying gas to furnaces, burners, and other appliances. A balancing system enables the regulator to control gas pressure accurately for maximum combustion efficiency despite varying inlet pressures.
133 Series

  • Wide pressure range capability with single regulator
  • Types 133L, 133H and 133HP suitable for monitoring applications
  • Excellent shock characteristics and fast speed of response
  • Bubble-tight shutoff
  • Spring and diaphragm effects minimized
  • No seat-to-seat adjustment required
  • Easy access to trim parts
  • Steel body available

 133 Series  Bulletin
 133H Schematic
 133L Schematic
 Instruction Manual