How to judge whether the dome valve is closed tightly?

1. Listen. Close the dome valve and open the unit intake valve. If the dome valve is not closed tightly, you can hear the sound of air leakage.

2. Touch. Close the dome valve, put the silo pump in the ash loading state, and touch the pipe wall below the dome valve by hand. If the pipe wall temperature rises greatly, it means that the dome valve is not closed tightly.

3. Look. When the dome valve is closed, the pressure switch of the dome valve will be pressed tightly by the screw rod on the rotation shaft of the dome valve, and the control cabinet (DCS screen) will show that the dome valve is closed. It can also be compared with the normal dome valve.