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Thread: Leaking sight Glass!?!!
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17-04-2007, 07:55 AM #1
Leaking sight Glass!?!!
Well today I was charged with taking out an old plant from an old sandwich cooler. So I removed the plant and be for cleaning it up I was told to check it. So I pulled a vac (The unit had leaked dry) and it actually held just fine, So I tested and noticed pressure wasn't holding well (But yet it held a vac!) So I went through and tested each part with soap water and BANG found the sight Glass bubbling away. I never seen this be for, How often does that occur?
I swapped out with a new sight glass and F/D and it's purring away, but was rather curious that a sight glass was leaking!
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17-04-2007, 08:59 AM #2
Re: Leaking sight Glass!?!!
Hi The MG Pony,
I once had leakage form a sight glass on a receiver. This sight glass was flare type (the glass part).
Otherwise not seen leakage from them.
CheersEven Einstein Asked Questions
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17-04-2007, 09:16 AM #3
Re: Leaking sight Glass!?!!
Ya thats where it was leaking from! Around the glass It was a R-134a system so pressur wasn't even that high! Orrigionaly R-12 but the tech who last worked on it replaced the sight glass comp, and F/D.
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17-04-2007, 07:10 PM #4
Re: Leaking sight Glass!?!!
The MG pony
Sight glass do leaks due to gaskets, you have already replaced with a new one, Why not open old one and check it,
malik55
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17-04-2007, 08:05 PM #5
Re: Leaking sight Glass!?!!
Took this picture of a sight glass last week. Believe it or not it was'nt leaking.
Cheers JonLast edited by monkey spanners; 23-09-2007 at 06:11 PM.
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17-04-2007, 09:03 PM #6
Re: Leaking sight Glass!?!!
When you say it held a vac, was this on a proper torr or milli bar gauge, and for how long?
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17-04-2007, 10:37 PM #7
Re: Leaking sight Glass!?!!
It could hold a vacuum as the seal can get pulled into/onto the mating surfaces/threads.
Brian - Newton Abbot, Devon, UK
Retired March 2015
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17-04-2007, 11:33 PM #8
Re: Leaking sight Glass!?!!
800 mTorr for a fiew minutes (Ya My pump is gimped I think)
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18-04-2007, 07:15 PM #9
Re: Leaking sight Glass!?!!
Brian is right ,have seen this many times on package chillers.
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19-04-2007, 12:56 AM #10
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19-04-2007, 06:09 AM #11
Re: Leaking sight Glass!?!!
Ya, first time for me too never would have sustected a sight glass, a drip fell on it as I moved the brush to the other flare and noticed slight bubles so put a full drop on and well!