Procedure for boiler guage glass blow down

Q-What is the procedure of Gauge Glass blow through
Ans -
- We have to blow through the gauge glass on daily basis
1. Shut steam side
2. Shut water side
3.Open the drain at the bottom
4. Then gauge glass become empty
5. Then open the steam side then steam start coming out from the drain It mean steam side is clear
6. Then close steam side and open water side then water start coming out from the drain it mean water side is clear
7. Now both side are clear then shut the drain
8.Open water side then water completely rise in the gauge glass
9.Then open steam side to see the accurate water level in the boller.

NOTE -  why we open water side first not steam side so the answer to this
queștion is if we open steam slde first then it may break the gauge glass because latent heat of
steam is comparatively very high with respect to water.
NOTE- different types of gauge glass
1. Tubular tube type gauge glass
Plate type gauge glass
2.Now a days we are using plate type gauge glass because from the long distance you can able to see the level of water inside the boiler/gauge glass.