Motor driven type flow rate controlling valve

摘要

As a motor (12) is rotationally driven, a valve stem (4) is reciprocally displaced to open or close a flow passage (1c) formed in a housing (1) for a high temperature fluid. The motor (12) is held via a bracket (14) of which the inner surface (14a) has a concavely recessed contour, and the bracket (14) has a predetermined height and a plurality of openings (14b) are formed on the wall surface of the bracket (14). The housing (1) and the bracket (14) are made integral with each other, and supporting portions (14d) formed between adjacent openings (14b) are dimensioned to have the smallest cross sectional size necessary from the viewpoint of a strength. With this construction, an efficiency for performing an assembling operation for a motor driven type flow rate controlling valve can be improved, and moreover, a quantity of heat to be conducted from the bracket (14) to the motor side can be reduced.