Temperature control valves in turbine region of thermal power plant

   There are many areas where temperature control valves are used but specially and most important of it's application are present in the turbine area of a thermal power plant. There are four major areas where we use these temperature control valves two of these are used to maintain the temperature of the water and two of these are used to maintain the temperature of the oil. They are
1) cold gas temperature control valve
2) primary water temperature control valve
3) Main oil tank temperature control valve
4) HPCF temp control valve.

The main oil tank temperature control valve is used to maintain the oil temperature to the range defined, if the temperature is more that the setpoint the valve is closed and the oil is passed through the coolers and gets cooled, if the temperature is less compared to the setpoint the valve is opened and the temperature is raised.

The temperature control valve of hpcf is operated in the similar manner compared to the main oil tank temperature control valve as the oil needs to be maintained in specific temperature range if not maintained the expansion of the shaft will be uneven and results is defects arised in the longer run and also during the valve opening and closing.

Primary water temperature control valve is used to maintain the temperature of the primary water in the defined setpoint range, the primary water is used to cool the stator windings in the generator.

The cold gas temperature control valve is used to maintain the temperature of the cooling water which is used to cool the hydrogen gas. The hydrogen gas is used for cooling the rotor.