As soon as the valve element is in {HEAD ~ contact} with {TAIL ~ the stopper} and the driving arm is rotated extra by the motor, the driven arm and the valve element will remain stopped in the correct extreme position while the elastic coupling member is elastically deformed 
with
As soon as the valve element is in { HEAD ~ contact } with { TAIL ~ the stopper } and the driving arm is rotated extra by the motor , the driven arm and the valve element will remain stopped in the correct extreme position while the elastic coupling member is elastically deformed
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH