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Post by havoc on May 26, 2008 18:03:00 GMT
You can get PTFE additives for motor oil in most car part shops. But I would not use it in a loc where the oil is going through the superheater. If rests of ptfe from the oil stay in the superheater when the regulator is closed I think temperature will rise above the max for ptfe. And we have been warned enough to not try to overheat ptfe.
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abby
Statesman
Posts: 928
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Post by abby on May 26, 2008 20:01:16 GMT
I have asked this question before , how does oil get into your superheater ? surely it is added as close to the cylinder as possible.
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cotswold
Part of the e-furniture
Still testing the water
Posts: 307
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Post by cotswold on May 26, 2008 20:12:13 GMT
I have asked this question before , how does oil get into your superheater ? surely it is added as close to the cylinder as possible. This is only a suggestion but, could it happen in the absence of an effective snifting valve? |
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Post by havoc on May 27, 2008 6:43:28 GMT
Normally you try to get it as close to the cylinder as possible. But in the smaller scales (G1) there is often only a displacement lubricator before the superheater. It has to be there as superheated steam is harder to condensate meaning the lubricator doesn't work as good.
It won't be a problem with mechanical lubricators unless oil gets suck back into it.
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