[RE-wrenches] Pt valves as overheat control

[Jeff Clearwater, Village Power Design]

Hey Folks,

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.

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.

Jeff C.


>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.
>
>Todd
>
>
>
>Conrad Geyser wrote:
>
>>Todd Cory
>>
>>Todd,
>>
>>
>>
>>I'm afraid that any PT valves that I've ever known have continued 
>>to weep indefinitely after one or two overheat triggers. 
>>
>>I would not recommend relying on them for heat control devices.
>>
>>
>>
>>Conrad
>>
>>Cotuit Solar
>>
>>NABCEP thermal cert.
>>
>
>
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-- 
~~~~~~~~~~~~~
Jeff Clearwater
Senior Design Engineer
NABCEP (tm) Certified Solar PV Installer
http://www.nabcep.org/
Village Power Design
Turnkey Solar Design & Installation for the Commercial Sector
http://www.villagepower.com
gosolar at villagepower.com

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