After blowing down the water column and gauge glass, what should be observed?

When the water column and gauge glass are blown down, the purpose is to clear any impurities or sediment that may have accumulated, allowing for an accurate reading of the water level in the boiler. After completing this procedure, it is essential to observe the gauge glass closely.

If the system is operating correctly, water should promptly rise in the gauge glass. This indicates that the water level in the boiler is sufficient, and the gauge glass is functioning properly. A quick rise in water level confirms that the blowdown was effective and that the system is correctly indicating the true water level in the boiler.

Other potential observations, such as steam pressure stabilizing or temperature dropping, might not occur directly as a consequence of blowing down the water column and gauge glass. Increased noise levels are also not associated with this procedure; in fact, they would generally indicate some other issues within the boiler system that are unrelated to the gauge glass's functionality.