Electric sleeve regulating valve working principle
Working power: AC22V 380V and other voltage levels. This type of valve should generally be installed horizontally in the pipeline.
By receiving the signal of the industrial automation control system (such as: 4~20mA) to drive the valve to change the cross-sectional area between the valve core and the valve seat to control the flow, temperature, pressure and other process parameters of the pipeline medium. Implement automatic adjustment functions.
The direct acting type is also called spring loaded type, and its structure has elastic elements such as: spring, bellows, bellows type warm pack, etc., which utilizes the principle of balance between elastic force and feedback signal.
The indirect acting regulating valve adds a pilot (pilot valve) which amplifies the feedback signal and then drives the main valve flap to move the valve opening to change the valve opening.
In the case of a pressure regulating valve, the feedback signal is the outlet pressure of the valve and is introduced into the actuator through the signal tube.
In the case of a flow regulating valve, there is an orifice plate (or other resistance device) at the outlet of the valve to extract the differential pressure signal from both ends of the orifice plate into the actuator.
In the case of a temperature regulating valve, the outlet of the valve has a temperature sensor (or a warm pack) that drives the actuator through thermal expansion and contraction of the medium in the temperature sensor.
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Label: How the electric sleeve adjustment valve works
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