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Vacuum systems

I have a question regarding vacuum levels for a given system.

Is there a formula or some kind of standard for a given vacuum?

Example : I have a job site with 2 large cleaver Brooks boilers whose associated vacuum system is running at 29" ( inches)

Is this normal? To much?

How do I know?

What level ought it be?

Is this current level likely to cause a problem?


  • vacuum questions

    while you are waiting for a response from the sages of steam here, you could do a search here for "vacuum", and it will probably give you some links in the library, and other threads.

    is this 1-pipe, or 2-pipe heating?

    vacuum systems are a favorite topic, so you will probably get quite a bit of interest!--nbc
  • Brad WhiteBrad White Member Posts: 2,393
    edited February 2011
    29 inches is practically

    a perfect vacuum, too high for any but deep variable vacuum systems. That system should heat up very, very quickly. Variable vacuum systems such as VariVac operate between 6 and 25 inches normally, the higher vacuum during warmer weather produces cooler steam, in the range of 140 degrees. Cool.

    A typical constant vacuum system such as I have seen will operate at between 6 and 10 inches Hg.

    However, if you can maintain 29 inches, dang, that is a tight system, good test.
    "If you do not know the answer, say, "I do not know the answer", and you will be correct!"

    -Ernie White, my Dad
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