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Post by havoc on Aug 30, 2008 8:47:55 GMT
A few bubbles air in your boiler won't make it dangerous. But it will take you a bit more effort to get it to pressure.
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Post by spamcanman on Aug 30, 2008 9:19:15 GMT
I use one of these it's fixed into a nice wooden box with a large pressure gauge fixed inside on the lid, all pipes are high pressure nylon and all fittings are enott push fittings I can then test any boiler up to a bout 21/2 gauge
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firebird
Seasoned Member
Conway now up and running
Posts: 149
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Post by firebird on Aug 31, 2008 18:46:06 GMT
Hi The pump was assembled using ptfe tape to seal the threads. The pump was then mounted on a strip of aluminium bar with a stainless steel countersunk cap screw. I made up a couple of brass connectors and soldered them to a length of 1/8 copper pipe. The pipe was first connected to the pump using an 'O' ring to seal it, the pump then stood in a tin baking tray which was filled with filtered rain water. The pump was operated to fill the pipe with water then connected to the guage with an 'O' ring to seal it. The guage I have has a maximum pressure of 80psi but is red lined at 60psi so I pumped the pressure up to 60psi which it held for 20 minutes. The valves in the pump sealing perfectly. Heres a video Cheers
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Post by davidimurray on Sept 1, 2008 16:47:22 GMT
Grrr- damn you firebird - now I'm going to have to go and build one of those myself !!! Seriously though a fantastic piece of kit and thanks for posting the plans.
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Post by chris vine on Sept 1, 2008 19:51:57 GMT
Hi Firebird,
Is your workshop in an old railway carriage??
Looks like you might have got one over on all of us if it is!!
Chris.
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firebird
Seasoned Member
Conway now up and running
Posts: 149
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Post by firebird on Sept 1, 2008 21:24:17 GMT
Hi Chris Nice thought but no. I built the workshop myself a couple of years ago. Cheers
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Post by Deleted on Sept 1, 2008 21:29:44 GMT
That looks really nice: I bet you feel like Steve McQueen when you escape to your den! JB
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denis M
Part of the e-furniture
Posts: 300
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Post by denis M on Sept 1, 2008 21:56:53 GMT
At the risk of upsetting the normal model engineer and mentioning buying something, I bought a really nice pump with hose, tank, gauge and valve to stop any leakage through the pump form our local plumbers merchant. They are used for testing central heating systems etc.
Cost around £90-00 or so but really does the job well especially on a large 71/4 boiler.
With Christmas coming its worth mentioning to the wife.
Denis
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steam4ian
Elder Statesman
One good turn deserves another
Posts: 2,069
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Post by steam4ian on Sept 2, 2008 0:49:54 GMT
G'day Firebird. How have you calibrated you gauge?
See my earlier past for a suggestion.
BTW, great workshop, better than my steel framed iron sheeted shed.
Regards Ian
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firebird
Seasoned Member
Conway now up and running
Posts: 149
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Post by firebird on Sept 2, 2008 19:25:47 GMT
Hi Ian
I tested it on air. We have a calibrated guage at work that I did a comparison with.
Cheers
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