To blow down the gauge glasses proceed as follows:
1. Close the isolating valve on the water leg.
2. Open the drain cock and allow steam to blow through the gauge glass.
3. Open the isolating valve on the water leg.
4. Close the isolating valve on the steam leg and allow water to blow through..
5. Open the isolating valve on the steam leg.
6. Close the drain cock.
7. The gauge glasses should be blown long enough to ensure that the water returns to a clear colour once the process is complete, this will take approximately 10 seconds for each operation.
8. Once the process is complete, check that all the valves are in their correct position.
9. Please note the gauge glasses should be blown through every shift.
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Hello Raymond! You have a very nice guide here. Can you suggest a good drain cock for gauge glasses? The one that we’ve been using is a ground plug shutoff (compression to compression). For me, it’s much more effective than the other types because of its compression ability. Gayle Manning
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