Industrial steam turbine control valve
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The secondary oil pressure of the turbine is 0.15 MPa, at which point the control valve begins to move. How can one determine that the control valve has started to move? Also, when the valve is closed, the bending lever and the feedback rod do not touch each other; do they start to touch at 0.15 MPa? How can one determine whether the valve is fully open?
There is a travel measuring scale on the right side. Look at the reading of that one.
There is a correspondence between the secondary oil pressure and the scale on the turbine indicator rod: a secondary oil pressure of 0.15 Mpa corresponds to the zero mark, while a secondary oil pressure of 0.45 Mpa corresponds to the 100 mark.
At an oil pressure of 0-0.15 MPa, if the control valve does not move, then the piston of the hydraulic actuator also does not move, right?