FLOW CONTROL VALVES

摘要

An embodiment of a flow control valve includes a housing and a valve member. The valve member is movable in an axial direction within the housing, so that a flow rate of a fluid flowing within the housing changes in response to a position of the valve member within a control range in the axial direction. A spring device biases the valve member in the axial direction, so that the valve member moves in the axial direction against a biasing force of the spring device according to a difference in pressure on an upstream side and a downstream side of the valve member. The spring device includes a spring constant that changes according to the position of the valve member in the axial direction within the control range.

主权项

1. A flow control valve comprising:
a housing having an inlet port and an outlet port; a valve member movable in an axial direction within the housing; a spring device configured to bias the valve member in the axial direction toward the inlet port; and a monitoring hole portion disposed within the housing; wherein: the valve member includes a base shaft portion and a monitoring shaft portion; with the monitoring shaft portion positioned within the monitoring hole portion, the valve member moves in the axial direction within the housing in response to a difference in pressure between an upstream side and a downstream side of the valve member within the housing in order to monitor a flow rate of a fluid flowing from the inlet port to the outlet port; the spring device comprising a plurality of springs, and the plurality of springs being configured such that a spring constant of the spring device changes within a movement range of the valve member during a monitoring operation.