Flapper nozzle arrangement is basic mechanism used in many components of instrumentation and control such as E/P Converter, Valve positioner, etc. The trainer kit is designed to demonstrate basic concept of flapper nozzle arrangement. Students can operate and feel the flapper nozzle arrangement and understand how mechanical arrangement is converted to pressure signal.

A regulated pneumatic supply provides a source of air through the restriction. Between the nozzle opening and the flapper air escapes. Facility is provided to vary and measure the gap. Pressure gauges are provided to measure pressure.


  • Flapper-Nozzle arrangement
  • Pressure gauge
  • Air filter regulator
  • Micrometer
  • Pipes and fitting