What is the principle of temperature control?
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Question: Could someone please explain the control principle of the 0903 temperature gauge shown in the screenshot?
This is a temperature control loop; it should adjust the valve opening based on temperature
What do the labels TT, TV, TY on these instruments mean?
TT------T temperature, T transmission. TV------T temperature, V valve. TY-----T temperature, Y converter (in the diagram it is an electrical valve positioner).
:victory: Thank you
Isn’t this just adjusting the opening based on temperature?
The temperature transmitter 0903 detects the temperature and converts it into an electrical signal, which is then sent to the temperature control unit (with low-level alarm function). The controller transmits the corresponding electrical signal to the electric/pneumatic converter TY, thereby driving the TV to take action and achieving temperature regulation.
I wonder what medium flows through these two pipes respectively? Why is the temperature of the lower pipe used to control the flow rate of the upper pipe?