FLOW RATE CONTROL VALVE SYSTEM

摘要

A flow rate control valve system comprises a stepping motor, a valve body, a first cylindrical cover member and a second cylindrical cover member. A rotary shaft is projected outwardly from the motor housing. A sleeve is threadedly mating with a projecting portion of the shaft. The sleeve is also movable longitudinally and is prevented from its rotation. The valve body is integrally coupled with the sleeve and the sleeve is fitted over an outer end of the shaft. The flow rate is controlled by the variation of its position relative to the valve seat of the fluid passage within the body. The first cover member is supported to the body and the second one is supported by the motor housing.