Pressure Gauges

I am on the hunt for a 1/2" pressure gauge marked up for 20psi I also need a safety valve set at 20psi for my traction engine build,

where can I get these from?

Polly model engineering and Blackgates eng. both show 1/2" dia. pressure gauges in their online catalogues. The lowest pressure range goes up to 80psi. I bought one for a Roundhouse 'Bertie' garden railway loco.

I don't think you will find a lower range gauge in that size.

I think the Mamod safety valves are rated around 20-25psi so you could use one of those. Forrest Classics also do a 30psi gauge for the Mamod but not sure of the diameter.

J

Edited By JasonB on 27/02/2014 12:23:02

I may have resolved this contacted Acme Engineering Mike Ousby who is looking into this.

hi john,

ive made a few of my own to roy amesbury's design ME 1974. i think that's the only way you will get what you want without considerable expense from a 3rd party. i think ive read everything about miniature pressure gauge making in the SMEE journals and ME over the last 90 years!

not for the faint hearted, but very rewarding. i knew the late freddie dinnis whose FSD miniature pressure gauges adorn many award winning locos and were even used by Rolls Royce. i was privileged to know how freddie made his miniature gauges apart from bending the phos bronze bourdon tube (which he kept a closely guarded secret) - i had to work that out for myself! roy rather glossed over how to do this which is a shame. anneal, then burnish to work harden or leave to age harden.

cheers,

julian

Hello John,

You could have a look at http://www.minipressuregauge.co.uk/ - they might be able to help.Click on "Pressure Gauges for Steam Driven Models"

Hello Julian,

Roy Amsbury did make some superb gauges,including a working 'Duplex' vacuum gauge.Amazing work!