Electric sleeve regulating valve power supply: AC22V 380V and other voltage levels. This type of valve in the pipeline should be generally horizontal installation. By receiving industrial automation and control system signals (such as: 4 ~ 20mA) to drive the valve to change the size of the cross-section between the valve core and valve seat control flow media, temperature, pressure and other process parameters. Automatic adjustment function. Direct action, also known as spring-loaded, the structure of elastic elements such as: pieces of spring, bellows, bellows-style temperature package, the use of elastic force and feedback signal balance principle. Indirect-acting control valve, an increase of a pilot (pilot valve) It plays a role in amplifying the feedback signal and then through the implementing agencies, driving the main valve disc movement to achieve the purpose of changing the valve opening. In the case of a pressure regulator, the feedback signal is the outlet pressure of the valve and is introduced into the actuator via the signal line. In the case of a flow control valve, an orifice (or other resistance device) at the outlet of the valve removes the pressure difference signal from both ends of the orifice and introduces it to the actuator. If it is a thermostatic valve, there is a temperature sensor (or warm bag) at the outlet of the valve to drive the actuator through the thermal expansion and contraction of the medium in the temperature sensor.
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