Motorisch betriebene Regelventileinrichtung

摘要

The control valve opens and closes a valve by a reciprocating motion of a motor shaft driven by normally and reversely rotating a motor. The pushing type motor-driven control valve device comprises a valve shaft for driving the valve and a motor shaft for driving the valve shaft, the motor shaft being separated from and disposed coaxially with the valve shaft. A valve shaft spring urges the valve shaft in a first direction of closing the vale. A motor shaft spring urges the motor shaft in a second direction of opening the valve. A first pushing force is applied on the motor shaft by the motor shaft spring which is set to be smaller than a second pushing force applied on the valve shaft by the valve shaft spring.