<!doctype html public "-//W3C//DTD W3 HTML//EN">
<html><head><style type="text/css"><!--
blockquote, dl, ul, ol, li { padding-top: 0 ; padding-bottom: 0 }
--></style><title>Re: [RE-wrenches] Pt valves as overheat
control</title></head><body>
<div>Hey Folks,</div>
<div><br></div>
<div>When I installed SS heat exchangers in wood stoves a while back,
I always made sure to have 2 PT valves in the system for redundancy in
case one stuck or underperformed. Steam explosions are simply no
fun.</div>
<div><br></div>
<div>We'd locate one right on the woodstove outlet and another at the
first bend of that same output. Sometimes there would even be a
third one on the tank as well.</div>
<div><br></div>
<div>Jeff C.</div>
<div><br></div>
<div><br></div>
<blockquote type="cite" cite><font face="Arial" size="+1">Sure, but
the discussion was about preventing hot water storage tanks from
exploding. Putting BTUs into a tank, whether that be from a wood
stove loop or 5 kW electric heating element is not the issue. Relying
on a P/T valve to regulate overheating is of course not a good idea,
but it will prevent the tank from exploding.<br>
<br>
Todd<br>
<br>
<br>
</font><br>
Conrad Geyser wrote:<br>
<blockquote type="cite" cite>Todd Cory<br>
</blockquote>
<blockquote type="cite" cite><font face="Arial" size="-1"
color="#000080">Todd,</font><br>
</blockquote>
<blockquote type="cite" cite><font face="Arial" size="-1"
color="#000080"> </font><br>
</blockquote>
<blockquote type="cite" cite><font face="Arial" size="-1"
color="#000080">I'm afraid that any PT valves that I've ever known
have continued to weep indefinitely after one or two overheat
triggers. </font><br>
</blockquote>
<blockquote type="cite" cite><font face="Arial" size="-1"
color="#000080">I would not recommend relying on them for heat control
devices.</font><br>
</blockquote>
<blockquote type="cite" cite><font face="Arial" size="-1"
color="#000080"> </font><br>
</blockquote>
<blockquote type="cite" cite><font face="Arial" size="-1"
color="#000080">Conrad</font><br>
</blockquote>
<blockquote type="cite" cite><font face="Arial" size="-1"
color="#000080">Cotuit Solar</font><br>
</blockquote>
<blockquote type="cite" cite><font face="Arial" size="-1"
color="#000080">NABCEP thermal cert.</font><br>
</blockquote>
</blockquote>
<blockquote type="cite" cite><br></blockquote>
<blockquote type="cite" cite><br>
_______________________________________________<br>
List sponsored by Home Power magazine<br>
<br>
List Address: RE-wrenches@lists.re-wrenches.org<br>
<br>
Options & settings:<br>
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org<br
>
<br>
List-Archive:
http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org<br>
<br>
List rules & etiquette:<br>
www.re-wrenches.org/etiquette.htm<br>
<br>
Check out participant bios:<br>
www.members.re-wrenches.org</blockquote>
<div><br></div>
<div><br></div>
<x-sigsep><pre>--
</pre></x-sigsep>
<div>~~~~~~~~~~~~~<br>
Jeff Clearwater<br>
Senior Design Engineer<br>
NABCEP (tm) Certified Solar PV Installer<br>
http://www.nabcep.org/<br>
Village Power Design<br>
Turnkey Solar Design & Installation for the Commercial Sector<br>
http://www.villagepower.com<br>
gosolar@villagepower.com<br>
<br>
Voice: 413-259-3776<br>
Fax: 413-825-0703<br>
65 Schoolhouse Rd<x-tab>
</x-tab><br>
Amherst, MA 01002<br>
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</div>
</body>
</html>