As soon as the valve element reaches {HEAD ~ the desired extreme position} in {TAIL ~ contact} with a stopper, the motor is rotated to deform the elastic coupling member and to improve the contact between the valve element and the stopper 
in
As soon as the valve element reaches { HEAD ~ the desired extreme position } in { TAIL ~ contact } with a stopper , the motor is rotated to deform the elastic coupling member and to improve the contact between the valve element and the stopper
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL 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