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The fixed restriction is a 303 stainless steel bodied fitting with a stainless steel orifice plug.
The fixed restriction controls the flow rate in the pilot system. The orifices are sized to provide the proper control to a select series of valve sizes only. This all stainless steel version replaces all previous versions of the brass body, with stainless steel insert.
  • ‘A’ 1 / 8 in / 3.2 mm orifice
  • ‘B’ 1 / 16 in / 1.6 mm orifice
  • ‘C’ 3 / 32 in / 2.4 mm orifice
  • ‘D’ 1 / 4 in / 6.35 mm orifice
  • ‘E’ 7 / 64 in / 2.8 mm orifice
Fixed Restriction

Specs

Maximum working temperature
180°F (82°C)
Maximum working pressure
600 psi (41.4 bar)
Connections
1/4" NPT