Recharging spheres Tecnosir

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BodgeItAndScarper
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Re: Recharging spheres Tecnosir

Post by BodgeItAndScarper » Mon Jul 17, 2017 6:35 pm

ZSx wrote: If and when he offers the valves I will buy them and fit them... but I will need to find a nitrogen refill station that copes with 17 bar! :sf:

When this happens I will write a how to.. but it sounds very easy TBH (as long as you have a hydra-gas pump, which I currently do not!)
Did we ever come to any conclusions on the suggestion of using a plumber's pressure test pump for that?

https://www.ebay.co.uk/i/281990239756

Add the low-loss valve - which you can get from the US for £20-30 I think, and you should be sorted.

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John SS
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Re: Recharging spheres Tecnosir

Post by John SS » Mon Jul 17, 2017 9:10 pm

BodgeItAndScarper wrote:
ZSx wrote: If and when he offers the valves I will buy them and fit them... but I will need to find a nitrogen refill station that copes with 17 bar! :sf:

When this happens I will write a how to.. but it sounds very easy TBH (as long as you have a hydra-gas pump, which I currently do not!)
Did we ever come to any conclusions on the suggestion of using a plumber's pressure test pump for that?

https://www.ebay.co.uk/i/281990239756

Add the low-loss valve - which you can get from the US for £20-30 I think, and you should be sorted.
Don't really see why you would need to reinvent the wheel. The existing pump designed to do the job is already available on eBay and works absolutely fine. There is no need at all for a low loss connector, in my experience. I have pumped up several F's with no problems.

beefio
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Re: Recharging spheres Tecnosir

Post by beefio » Mon Jul 17, 2017 9:48 pm

Have you just pumped it up a bit or done it from completely flat as I've read those pumps you refer to take forever to do it from empty...where as the plumber pump are better and half the price.

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John SS
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Re: Recharging spheres Tecnosir

Post by John SS » Mon Jul 17, 2017 11:26 pm

beefio wrote:Have you just pumped it up a bit or done it from completely flat as I've read those pumps you refer to take forever to do it from empty...where as the plumber pump are better and half the price.
£50 v £65 I make it. I have not done one from empty but did do a car that was virtually on the bump stops and it only took about 20 minutes, at most. I will take your word for the plumber pump being better, but haven't read of anybody trying it.

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Re: Recharging spheres Tecnosir

Post by beefio » Tue Jul 18, 2017 7:28 am

£27 v £65...

https://www.ebay.co.uk/itm/271968545293

Charles recommend this kind of pump which is why i brought it, but I haven't actually used it yet...I actually got mine for £21 and it seems very well made!

beefio
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Re: Recharging spheres Tecnosir

Post by beefio » Tue Jul 18, 2017 7:54 am

I got this low loss Connector for £29.50...

http://www.aamason.com/aamason-0101

I also needed this adapter...

http://r.ebay.com/MN1A9y

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John SS
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Re: Recharging spheres Tecnosir

Post by John SS » Tue Jul 18, 2017 8:33 am

beefio wrote:£27 v £65...

https://www.ebay.co.uk/itm/271968545293

Charles recommend this kind of pump which is why i brought it, but I haven't actually used it yet...I actually got mine for £21 and it seems very well made!
Sounds good. Look forward to hearing how you get on with it.

jaapaap1111
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Re: Recharging spheres Tecnosir

Post by jaapaap1111 » Tue Jul 18, 2017 8:39 am

I used the plumber pump. It works great and easy. No mess. Easy to do the pump up, release fluid cycle to get rid of all air. Bought the low loss connector at skygeek.com.

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BodgeItAndScarper
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Re: Recharging spheres Tecnosir

Post by BodgeItAndScarper » Tue Jul 18, 2017 12:07 pm

Thanks, that's good to know.

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Re: Recharging spheres Tecnosir

Post by Reckless Rat » Tue Jul 18, 2017 2:53 pm

I have pumped up the re-gassed spheres from completely flat using my cheapo pump. The secret is in putting fluid into the spheres before reconnecting the hydragas pipes to minimise air pockets. Then pump to pressure, allow to settle and drain. This removes virtually all of the air which is then in emulsion in the fluid. Re-pressurise again using clean fluid and all should be well. If not, repeat. You can also purge air out of the hydragas pipes by cracking the joint with the sphere before pressurising and having someone pump fluid through. Re-tighten when fluid runs through clear. Bit messy but effective.

This is the method suggested by Ian at Hydragas conversions and it seems to work for me.

One thing worth checking, if you are using a cheapo pump - the 'O' rings in the pump chamber are very easily worn out by the reciprocating action. replacing them before starting the job will save ages of effort at the lever!

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