How Often Should You Bottom Blowdown Boilers?

boiler bottom blow down valves

The valves associated with a boiler bottom blowdown. This is also where you drain from. We’ve got that one circular handled valve, and then the two to the left with lever handles.

Easy question yeah?  Must be a standard for bottom blowdowns everyone here should be saying.  There is, sort of.  The number of bottom blowdowns actually required daily is a moving target.  There is not one set answer for every single boiler.

It is a simple answer though.

The quantity of bottom blowdowns required each day, for each boiler, ultimately depends on the conductivity of the boiler water.

Don’t forget that conductivity is merely a reading of the amount of solids, both dissolved and undissolved, floating around inside causing corrosion.

If that was the answer you came looking for, there you have it.  Below here, we are going to dive deeper into it.  Talk about why we are actually concerned with the frequency of bottom blowdowns, how to adjust and fine tune your own.

This is perhaps the most common question asked and debated about by building and stationary engineers. Read more