Making a pressure gauge

cc101 · Unread post by **cc101** » 01 Oct 2013, 20:55

Hi all, I'm making a pressure regulator tester and am after a few pointers on how to attach the pipe to the gauge, I've got a friend who's a welder. I've got plenty of Citroen pipe which have fittings on the end to screw into the pressure regulator. Any advice will be greatly appreciated.

lankytim · Unread post by **lankytim** » 01 Oct 2013, 21:23

I'd imagine somewhere like Pirtek could make an adaptor up easily enough.

Chlorate · Unread post by **Chlorate** » 01 Oct 2013, 21:30

If you know someone who has a lathe or a pillar drill you could make up something to do that in an afternoon. Just need to find out what the thread size is on the Citroen fitting and off you go.
Short piece of bar stock, drill all the way through, drill and tap 1/4" BSP thread in one side and the Citroen fitting size on the reg on the other.

cc101 · Unread post by **cc101** » 01 Oct 2013, 21:33

Could I just braze the pipe onto the bottom of the gauge?

citronut · Unread post by **citronut** » 02 Oct 2013, 08:01

cc101 wrote:Could I just braze the pipe onto the bottom of the gauge?

no reason why not, but obviously remove the fitting from the gauge beforehand

MJM · Unread post by **MJM** » 03 Oct 2013, 13:42

That's a glycerine damped gauge with a rubber seal visible in the photo. You need a mechanical joint onto it, brazing will damage it.

Unread post by **Peter.N.** » 03 Oct 2013, 13:46

If you go to your local plumbing supplier you will probably be able to get a fitting to screw on which will accommodate a small copper pipe, you could then solder a hydraulic pipe to it.

Peter

http://www.ebay.co.uk/itm/2-x-Genuine-P ... 27cf107706" onclick="window.open(this.href);return false;

cc101 · Unread post by **cc101** » 04 Oct 2013, 17:04

Here's my finished result will test it after work and post a video of it in action!

Chris.

lankytim · Unread post by **lankytim** » 04 Oct 2013, 17:35

Nice! Did you have the pipe made up? I would have been wary of brazing it. I'd imagine it would make a loud bang if the joint failed.

Stickyfinger · Unread post by **Stickyfinger** » 04 Oct 2013, 19:27

Sorry to be a dumb one, but what would you need that for ??

Unread post by **Rhothgar** » 04 Oct 2013, 20:07

I think Jim's are brazed.

addo · Unread post by **addo** » 04 Oct 2013, 23:04

I would sleeve over the flex hose section with fuel hose or similar. With feed pressure it'll be quite stiff and I'd worry that flexing it may cause failure.

cc101 · Unread post by **cc101** » 04 Oct 2013, 23:28

I had a local hydraulic specialist make it up for me with industrial fittings the rubber hose is good for up to 400 bar, charged me 15 quid to make it up!

addo · Unread post by **addo** » 05 Oct 2013, 00:07

Be careful still, a tiny leak could do much damage.

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Making a pressure gauge

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