| 摘要 |
<p>A fluid flow control proportional valve having structure for providing mounting therein of any one of a plurality of different solenoid coils having different electrochemical characteristics for providing desired positioning of the movable valve thereof. The solenoid armature is slidably mounted within the solenoid tube by structure providing extremely low friction so as to provide improved accuracy in correspondence between the current flow through the solenoid cell and resulting positioning of the spool assembly of the valve. The structure for mounting the armature in the solenoid tube further defines a seal between the armature and the solenoid tube. Pressure compensation structure is associated with the movable valve member for converting a portion of the instantaneous positive pressure differential acting across the valve between the inlet and outlet ports to urge the valve member to the closed position as a result of an increase in the pressure differential acting across the valve. A bypass tube is further provided for cooperation with the pressure compensation structure.</p> |
