What is BS EN ISO 22109 about?
BS EN ISO 22109 discusses industrial valves. BS EN ISO 22109 provides basic requirements for gearboxes to operate industrial valves for manual and automated on/off and modulating duties. This includes manual override gearboxes. BS EN ISO 22109 includes guidelines for classification, design and methods for conformity assessment.
BS EN ISO 22109 specifies three kinds of operation: