METHOD FOR ASSEMBLING MOTORIZED VALVE, AND MOTORIZED VALVE

Provided are a motorized valve and a method for assembling the motorized valve in which it is possible to accurately cause an excitation pole of a stator coil and a prescribed magnetic pole of a rotorto directly face each other when a movable stopper collides with a fixed stopper, such that both magnetic pole alignment and reference point indexing can be accurately performed, without requiring strict control of a guide bush or the like. The abovementioned method comprises: a step for rotating a lower stopper base 25 such that a contact surface Ja of a fixed stopper 24 is positioned on a specific straight line C passing through a rotational axis O in a top view; a step for fixing the lower stopper base 25 to a stationary portion on a valve main body 40 side; a step for screwing a valve shaft holder 30 into a guide bush 20 to cause a valve body 14 to be seated on a valve seat 46, and further rotating the valve shaft holder 30 in the valve closing direction to cause a movable stopper 34to collide with the fixed