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What size bladder tank to replace compression tank?

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Brad White_33
Brad White_33 Member Posts: 16
in THE MAIN WALL
taking into account system volume, initial PSIA, final PSIA and your tank volume selection has some "fat" in it to cover any unforseen variables, then go with it. Personally I prefer to specify multiple tanks manifolded together should one fail. But that is just a risk assessment.

Double check your calculations and proceed with confidence in them.

Comments

  • Joe_8
    Joe_8 Member Posts: 32
    What size bladder expansion tank to replace compression tank

    A customer of mine has a 120 gallon horizontal compression type expansion tank in their hydronic system. They want to replace it with bladder tank(s) (vertical area is a problem). My supplier is recommending two 57 gallon total volume, 27 gallon acceptance expansion tanks.
    In doing my calculations, I came up with one 80 gallon total volume tank needed to convert. Naturally, one 80 gallon tank will cost less than two 57 gallon tanks (either way, ASME required).
    So I ask all of you, and I know that you do not have all the data needed, should I trust my calculations, or is my suppliers recomendations more on the mark. Thanks for your help.
  • Joe Mattiello_2
    Joe Mattiello_2 Member Posts: 94
    Expansion tank conversion spreadsheet

    Try this spread sheet out. This will help you with sizing.

    Joe Mattiello
    Technical Support Technician
    Tel. 401-942-8000 X 484
    Fax. 401-942-2360
    1160 Cranston St
    Cranston, RI 02920
    joemat@taco-hvac.com
  • Joe_8
    Joe_8 Member Posts: 32


    Thanks guys. You were a big help.
This discussion has been closed.

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