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Procedure for Blow Down a Boiler Gauge Glass?

  1. Close the water and steam cocks on the gauge glass and open the drain.
  2. Then open the steam cock-a strong jet if steam should be seen from the drain.
  3. Close the steam cock.
  4. Open the water cock-a strong jet of water should be observed from the drain.
  5. Close the water cock and then close the drain.
  6. Then open the water cock, the water will rise in the gauge above the normal level.
  7. Then open the stem cock, the water should then settle down, finding its correct level.


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