Combustion chamber ball valve operation sequence

Today I learn about ball valve operation sequence which located at the combustion chamber. These ball valves control the amount and the flow of the fuel gas flow into the burner inside the combustion chamber. There are three different modes in the burner. They are diffusion, premix and pilot valve.

For diffusion mode, the fire flame is yellow colour, produce No and Co, burn stable and not complete burning. Premix mode, the fire flame is blue colour, produce less pollution, burn unstable and complete burning. Beside that, pilot node is used to help premix mode to burn in a higher stability.



Because of all these characteristic, diffusion mode is used during start up and shut down of the combustion chamber, while premix and pilot mode are used during normal operation of the combustion chamber.