Why do we need bypass options in electro-pneumatic positioners?

Bypass options in electro-pneumatic positioners are essential for ensuring system reliability and maintenance flexibility. They allow operators to manually control the valve or actuator without relying on the automated system, which is crucial during maintenance or troubleshooting. This capability helps prevent downtime and ensures continuous process operation. Additionally, bypass options can facilitate testing and calibration of the control system without disrupting the overall process.