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Internal Syphon

BRIANJ
BRIANJ Member Posts: 118
in THE MAIN WALL
I have a factory installed Internal Syphon on my Peerless 63-06 steam boiler. After running for 10-20 minutes the internal syphon pressure reads 4-5 psi while the Vaporstat and pressure gauge are still showing ounces of pressure. Do I have a problem? If not what is the purpose of the Internal Syphon. Thanks for your help.

Comments

  • Brad White_184
    Brad White_184 Member Posts: 135
    Oh, those....

    The gauge that comes with the boiler (0-30 PSI) is a code requirement which does not state that it also has to be useful. It just has to be twice the relief valve setting of 15#, while you are, we hope, running at less than a pound.

    Sort of like measuring the velocity of a baby stroller with a Mach meter or ballistic chornograph....

    The internal siphon (OK, Syphon, I like your spelling better) is just to protect it at least in theory. Because the gauge is a code requirement to obtain the necessary listings, they have to install it at the factory and for shipping reasons they use an internal syphon. I have never seen one that was remotely accurate after being in service for any length of time.

    Just leave it alone and enjoy your ounces gauge and Vaporstat, knowing that they are more likely correct...
  • Captain Who
    Captain Who Member Posts: 452


    I have the Peerless 63-04L, which probably has the same "internal syphon" (I like the spelling, is this Old English?). I'll tell you what happened with mine. There is a brass hexagonal extension between the gauge and the boiler, which is really a snubber, I believe. If you remove this, from the boiler and the gauge, you will undoubtedly find that you cannot even blow through it! Probably your gauge takes a loooooong time to go back to zero after boiler stops firing, right? If you now take a very small straight pin and start scraping around in the annular space at the boiler end of the snubber, you may find a very small hole which is kinda at an angle to the snubber, in the annular ring. You should eventually be able to poke the pin through this hole and remove the clog. Your gauge will now be back to factory showroom performance. Kinda like trying to measure a flea with a yardstick!
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