 Thermostat Operation Question .., is it the air expansion that makes the bellows move? |
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| vesnyder |
 May 8 2006, 12:29 PM
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#1
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Senior Member  Group: Members Posts: 680 Joined: 14-April 05 From: Cleveland, OH Member No.: 3,933  |
I have three thermostats, two of which do not work, and the third moves very little (< 0.5 inch). I am coming to the conclusion that it is the internal air expansion that makes the bellows expand and contract - can sombody confirm this? Somebody said there is an internal spring, but I do not think that is the case? If my assumption is right, than if I ID the holes in the bellows and repair them they should work again - right? Just wondering if they are originally filled with some form of inert gas or gas that has some special expansion properties? Anybody know for sure??
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| bd1308 |
May 8 2006, 12:38 PM
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#2
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Sir Post-a-lot Group: Members Posts: 8,020 Joined: 24-January 05 From: Louisville,KY Member No.: 3,501 |
it was filled with oxygen pressurized to some pressure or partial vaccuum....
AFAIK it's just air... starts out at (x) mm and then at a certain test temp (212F) ends up at (x+y) mm where y is the amount of expansion.... b |
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| Hammy |
May 8 2006, 12:44 PM
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mr. Wonderful Group: Members Posts: 1,826 Joined: 20-October 04 From: Columbia, California Member No.: 2,978 Region Association: Northern California |
Where can we get new thermostats?
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| vesnyder |
May 8 2006, 12:49 PM
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#4
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Senior Member Group: Members Posts: 680 Joined: 14-April 05 From: Cleveland, OH Member No.: 3,933 |
The air we breathe is mostly Nitrogen and if it is a vacuum, that would be devoid of any air. It has to have some air in it if that is what is forcing the bellow expansion and contraction.
I spoke to guys at HPH and they have some at a reasonalbe price and I also heard Jake has some. Would be nice to get some new ones? |
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| sean_v8_914 |
May 8 2006, 01:05 PM
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#5
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Chingon 601 Group: Members Posts: 4,011 Joined: 1-February 05 From: San Diego Member No.: 3,541 |
I have repaired them before. there is not a spring in there, just air. put it in a vise and re-solder teh top
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