Patent ID: 9665105
Date: 2017-05-30
CPC Classifications: F16K,F24F,G05D

Claim:
1. A flow rate controlling valve comprising: a valve unit for adjusting the amount of opening of a flow path through which a fluid flows; a valve rod that is linked to the valve unit; a driver driving the valve rod; a differential pressure detector detecting, as a differential pressure across the valve unit, a differential pressure between a pressure of a fluid on a primary side of the valve unit and a pressure of a fluid on a secondary side of the valve unit; a differential pressure-torque non-transitory storage storing a relationship between the differential pressure across the valve unit and a torque that is to be outputted by the driving portion; a drive quantity controller controlling a drive quantity for the valve rod by the driver so that a fluid with a desired flow rate flows within the flow path; and a driving torque controller calculating a torque corresponding to the differential pressure across a valve unit, detected by the differential pressure detector, from a relationship stored in the differential pressure-torque non-transitory storage, to control a driving torque of the valve rod by the driver so as to output this torque.