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Oct 15, 2022 19:36:14 GMT
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I have a metro, and I'm goign to do the shrader valve mod to the suspension units. I need to fill them with Nitrogen. I don't think there is much to go in them, they are only small units, but where can i get them filled? Itll have the shrader type valve welded into them. I have seen bottles of the gas on ebay for about £40 that are 200 bar, i presume one of these would od but I'm not sure?
thought id ask!
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Oct 15, 2022 20:37:00 GMT
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I have a metro, and I'm goign to do the shrader valve mod to the suspension units. I need to fill them with Nitrogen. I don't think there is much to go in them, they are only small units, but where can i get them filled? Itll have the shrader type valve welded into them. I have seen bottles of the gas on ebay for about £40 that are 200 bar, i presume one of these would od but I'm not sure? thought id ask! How about a tyre fitter that will sell you nitrogen filled tyres? You will need to decide how much pressure you want them charged to. And it's worth using your compressor to check your welding first.
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Oct 15, 2022 20:42:00 GMT
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yes will fill them to check them, i need 20 bar, apparently your local tyre guy will do 10-14...
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Oct 15, 2022 22:09:39 GMT
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Hi, You could also try an aircon specialist because OFN (Oxygen free nitrogen) is use to pressure test aircon systems or at least should be.
Colin
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Oct 15, 2022 22:14:09 GMT
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Good question! I was wondering about this too, saw the same small bottles on eBay but didn't know if they had enough volume to work on all four.
Was thinking maybe a Aircon / HVAC installer as they use nitrogen to find leaks I think or a gas supplier, maybe a welding supply place?
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Oct 15, 2022 22:14:53 GMT
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Hi, You could also try an aircon specialist because OFN (Oxygen free nitrogen) is use to pressure test aircon systems or at least should be. Colin You beat me to it! 🤣
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Oct 15, 2022 22:23:20 GMT
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Hang on, if a garage does Aircon repairs maybe they'd be able to do it....
Could you let me know what you find out please?
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yes will do. this is where I'm up to. i got a second hand unit and drilled teh end, ive ordered some 1/8 steal fittings to weld on for the valves. ill be doing it over the next week, so will post more here.
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Oct 16, 2022 11:20:05 GMT
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Looking forward to seeing this!
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Oct 16, 2022 12:51:38 GMT
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200 bar bottle will need a regulator to control the fill, you'll need a tyre inflator type adaptor on hose with relevant connectors. So better to find somewhere. Assuming thay are hydragas units.Imagine you've looked here hahsltd.co.uk
My work uses an industrial bottle of nitrogen on a regulator rig , we do 14 bar regularly to refill fire extinguishers and the guage is no where near at max. Maybe a fire extinguisher place local to you.
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Last Edit: Oct 16, 2022 13:35:49 GMT by duggers
Needs a bigger hammer mate.......
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jimi
Club Retro Rides Member
Posts: 1,815
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Oct 16, 2022 14:20:51 GMT
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In my experience all Nitrogen bottles are 200bar+, as duggers said you need a specific Nitrogen regulator. I would think any tyre place that offers nitrogen filling gets their Nitrogen in 200bar+ bottles and use a regulator, same with AC/Refrigeration companies using OFN for testing (certainly the OFN I used offshore came in 230->300bar bottles) I'd go and ask at anywhere local that uses nitrogen, they are going to be using a variable regulator to set their working pressure.
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Last Edit: Oct 16, 2022 14:21:51 GMT by jimi
Black is not a colour ! .... Its the absence of colour
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Oct 31, 2022 11:30:43 GMT
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I would definitely want to be finding someone like an AC repair specialist who will have the means to safely fill and test such a thing. Regulators, proper hoses and connectors, pressure gauges and a method for venting the line and/or releasing any over-pressure from the displacer.
I work with high pressure gas on a semi-regular basis and still wouldn't want to be messing with that kind of thing without some help. Those sorts of pressures are serious to life-threatening injuries if something goes wrong. Pneumatic or hydraulic injection is a nasty way to go..
It's similar sorts of contained energy to rattling a top-mount off a strut and aiming the spring at a valued appendage.
You'll also want someone with a pretty accurate system as I imaging there would be some wonky handling with mismatched pressures!
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Oct 31, 2022 19:57:36 GMT
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yes i understand, i work with tipper trucks, i did night school in hydraulics and pneumatics, i know and have seen how wrong it can go. Mig welding the valve onto the unit attaches it, but its defo not sealing it. I'm going to take the unit to my mates, he will gas weld it on as that flows into the metals. I'm sure itll be fine, its a done thing... 4 units pressurised are over £400 so id like to have a go myself first. thanks
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