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Re: Steam Control

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Posted by HeatPro on May 29, 2009 at 10:06:43:

In Reply to: Re: Steam Control posted by Rick on May 28, 2009 at 22:37:10:

: Sorry maybe I worded it wrong. Im looking to control a steam coil used for comfort heating.

The usual is to feed the steam coil with a trap at the end and turn the fan on and off. A variable speed fan can alter the heated air output.

Piping as shown on page 4 here:

Zone valves for steam are available; however, be aware that steam trapped in a coil without having a means to allow air into the coil can collapse a coil from atmospheric pressure when the steam loses volume during condensing. Some traps or valves will have notches or holes in the seat to allow air to pass so the coil doesn't go into vacuum.




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