What is the control mechanism of this valve in the diagram?
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The yellow one is the electrical signal wire, and the blue one is the program signal wire. As a beginner, I find this really confusing; could an experienced person please provide detailed guidance on the control mechanism of this valve?
This valve is controlled by a pressure gauge. As for the two blue lines, they are used for temperature and pressure compensation; the material being transported is likely gaseous, and its volume changes with variations in temperature and pressure, so temperature and pressure compensation is needed to correct the flow rate
Correct. Additionally, it is the pressure transmitter PT17106002 that controls the control valve PV17106002; TE and PT are merely used for temperature and pressure compensation of the flow meter FT
The blue data cable is for output; it has no effect on pressure； A control valve is a simple pressure indication and control system, equipped with an over-limit indication. The signals from the pressure system and temperature system to the flow system are used for flow, temperature, and pressure compensation, and have nothing to do with control valves.
All the answers above are correct; you can break it down into two parts: ① The pressure control circuit controls the valve. ②Use pressure and temperature signals for temperature and pressure compensation of flow rate.
Pica is a flow control valve; the blue line represents the temperature and pressure compensation for the flow parameters