How is the tightness test of the turbine’s automatic main steam valve carried out?
Thread Content
I would like to ask how the tightness test for the turbine’s automatic main steam valve is carried out
Thoroughly warm up the turbine pipes, close all steam valves, then open the main steam valve (either manually or electrically), and open the quick-close valve to check whether the turbine will cause the rotor to spin and develop speed. This post was last edited by Longsky Eagle on 2009-2-9 11:46.]
The turbine is in a continuous barring mode, with all preparations completed prior to startup. The main steam pressure in front of the automatic main valve is at the rated value; the automatic main valve is fully closed while the control valve is fully open. If the turbine is not yet out of the barring mode at this point, it indicates that the main valve is leak-free. With the regulator valve fully closed and the main steam valve in the fully open position, if the turbine is no longer in the cranking mode but its speed remains below 400–600 r/min, then the tightness of the regulator valve is satisfactory.
Tell me more if you know anything; I’m really curious too