Basics of industrial valves – Part A4 : Actuation

extract of basic industrial valves chapter a4 actuation system guichon valvesAn actuator is a device that allows the operation of a valve (open/close/set). All valves function under the operating conditions proper to a process. It is important that the actuation is adequately sized and adapted to the environment in which it will be used (size constraints, energy available on site, etc.).

The sizing of an actuator must primarily take into account the forces required to:

  • Ensure the sealing contact pressure for tight shut-off of the valve
  • Overcome frictional forces of the gland packing
  • Overcome the pressure difference between upstream and downstream of the valve (ΔP)

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