I'm not sure if there was a published design for a 2" . If there was not it may just have been scaled down from the larger size and will depend on what the builder did when designing the boiler. I assume it's copper but is it silver soldered or an older rivited and caulked construction?

The 2" Clayton undertype is 80psi but has absolutely nothing to do with the traction engine you have other than the word "Clayton" and that it's steam-powered!

At risk of asking the obvious;

I am assuming the engine came with no boiler history, previous test certificates or the like?

Despite the patina of the gauge is there any sign on the face of a red line, discolouration or shadow where a line may have been? Any filed nick in the bezel that looks deliberate and aligns with a pressure between 50 and 80 psi? If none of these that suggests either it has not been tested in quite some years or the tester was quite lax on applying the “rules”.

If you can’t find a drawing or evidence of previous test it might be quite difficult to get a certificate on it these days that would allow you to run it in public.

Paul.

Hi Tony, yes I have checked the Les Burford auction catalogue and think it was the Dreweattes Transport sale auction where it first appeared for sale ; they might have records of the seller , who you could contact, but most likely there is no current cert or history… as Paul correctly explains above. Certainly,a rarely modelled engine! So the original builder did his own research and most likely did a good job.

Fingers crossed for you on the test.

regards

vic