Typical disadvantages of diaphragm actuator

Asked by sabdullayev 7 years ago | 1 Answers


1 Answer

0
ChemKB 7 years ago
  • A large proportion of available thrust is used to overcome the spring force
  • Linear design actuators can create hight issues for smaller valves in restricted location and for large valves casing can be excessive in weight.
  • Not quite linear characteristic
  • Lack of stiffness : hysteresis due to diaphragm stiffness, typically 3% 9 air permeates through diaphragm and is lost
  • Position holding is quite flexible due to the volume of air in the diaphragm case and the compressibility of air
  • Diaphragm can fatigue due to flexing

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