silver solder disaster part 2

silver solder disaster part 2

This topic has 5 replies, 4 voices, and was last updated 11 February 2013 at 23:50 by Bill Dawes.

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9 February 2013 at 13:18 #111458
Bill Dawes
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@billdawes
Hi all. a while ago I posted my traumas with my GLR vertical boiler silver soldering.

Well after a few nervous reheatings my intitial leak test is good.

This was at just a few psi of air not the full blown hydraulic pressure test.

Ironically the only leak I had was back out of the check valve which I had fitted with an adaptor to take a tyre connector. Tried cleaning the ball and blowing out but air still bubbling out.

Now my question to you experts is this.

Is the valve faulty / will it 'bed in' / does it need some work on it to bed it in/ or is this to be expected on air as presumably it is designed to retain hydraulic pressure.

Regards

Bill D.
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9 February 2013 at 13:18 #6571
Bill Dawes
Participant
@billdawes
9 February 2013 at 13:56 #111465
Russell Eberhardt
Participant
@russelleberhardt48058
It will probably be fine on hydraulic test. Do you have a suitable test rig?

Russell.
9 February 2013 at 14:00 #111466
Nigel Bennett
Participant
@nigelbennett69913
Bill

Air is a much more searching medium than water, so will find gaps that water won't. However, for an initial hydraulic test, it can be conducted on a bare boiler – with the holes plugged with solid threaded plugs. On hydraulic test your leaking valve won't be a problem! The extra pressure on hydraulic test will also assist in sealing any leaks from the check valve.

If it's a ball valve, try fitting a nitrile rubber ball. You could also burnish the seat to improve the seating of the existing ball or whatever.
10 February 2013 at 11:57 #111550
nigel jones 5
Participant
@nigeljones5
hi – my clacks often leak on air but seldom do on water/steam. If there is any crud on the ball seat air isnt good at self cleaning but steam will soon get rid of it.
11 February 2013 at 23:50 #111807
Bill Dawes
Participant
@billdawes
Successful hydaulic test, check valve was fine, steam trial next. Thanks for you help on this and my previous woes.

Silver soldering a boiler is certainly a job to try and get right first time!

Bill D
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