CONTROL VALVE FOR MEDIA IN VAPOR OR LIQUID FORM

摘要

A control valve assembly having spindle actuation for media in vapor or liquid form includes a main valve having a main valve seat. A control valve has a main throttle body cooperating with the main valve seat for opening and closing the main valve. The control valve has an associated main spindle for transmitting thrust forces to the main throttle body. An auxiliary valve has an auxiliary valve seat. The control valve has an auxiliary throttle body cooperating with the auxiliary valve seat for opening and closing the auxiliary valve. The control valve has an associated auxiliary spindle for transmitting the thrust forces to the auxiliary throttle body. A common spindle actuator supplies control forces for the main spindle and the auxiliary spindle. First and second spring-elastic couplings respectively transmit the control forces to the main and auxiliary throttle bodies. The main and auxiliary spindles are adapted for causing the main throttle body to close before the auxiliary throttle body reaches the auxiliary valve seat in a closing operation, and for causing the auxiliary throttle body to open before the main throttle body leaves the main valve seat in an opening operation.