Control and measurement valve for liquid, gas or vapour flow - has variable cross=section choke, and flow speed sensor

摘要

A control and measurement valve has a variable flow cross-section choke position and sensors for measuring the flow cross-section size and speed of flow. The flow cross-section measurement sensor is a displacement sensor with a coil rigidly attached to the valve body and a ferromagnetic ring rigidly attached to the choke element. The differential press. sensing flow speed sensor has a chamber divided by a membrane (13) into chambers (14,15) connected via bores to the choke position and a flow ram point. USE/ADVANTAGE - Simplifies measurement of heat given off by room heaters.