2 inch ruston proctor

This topic has 25 replies, 3 voices, and was last updated 6 December 2014 at 10:03 by derek blake.

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13 October 2014 at 19:31 #166463
derek blake
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@derekblake72550
Evening all.

Please can someone help me, I'm pulling my hair out trying to learn and understand traction engine's.

I have drawings for the pipework but I really don't understand it, the check valves have bigger size union nuts than the rest of the fittings, do you still use the same size pipework but use a bigger union nut? It says to put a pipe from the check valve to the injector but from what I can see the injector is 1/4 by 40tpi not the bigger size of the check valve fitting.

I know these are stupid questions but once I understand I will be fine..does anyone have any photos of how the setup goes? Not a drawing but some actual photos of the engine plumbing?

Any help gratefully received.

DEREK
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13 October 2014 at 19:31 #7336
derek blake
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@derekblake72550
13 October 2014 at 19:54 #166472
derek blake
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@derekblake72550
Do I just need to find a 90degree check valve which has the correct size thread and takes the same size pipe as with the rest of the piping?
14 October 2014 at 07:45 #166503
JasonB
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@jasonb
I would go by the pipe diameters shown and make a nipple or nut to suit if its not a standard size thread for the pipe size. Its possible that the injector and maybe also the clack are commercial items that may have a different thread to whats shown on the drawings. Its also quite common to have more than one pipe size on an engine depending on what its being used for.

J
14 October 2014 at 09:18 #166510
derek blake
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@derekblake72550
Thanks J

looks like from the drawing its all the same size pipework, i have brought a 90 degree check valve which has the correct thread for the boiler insert, and the correct size pipe nipple and union nut.

so i think i have worked it out. (hopefully)
16 October 2014 at 22:09 #166713
derek blake
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@derekblake72550
I've had a quote of £460 to machine my full gear set, I'm restoring a 2 inch ruston proctor.

Is this a good price? I'm happy to pay it as I understand the work and time involved, but if anyone knows of any other prices or persons who could do it for me please could you let me know before I sign on the dotted line.

Thanks everyone
17 October 2014 at 07:05 #166735
JasonB
Moderator
@jasonb
Is that full machining or just cutting the teeth on your machined blanks? I did all the turning on my 2" Fowler and then just had the teeth cut which worked out better, also on the smaller gears it is possible to buy commercial ones and just modify to suit, did four of mine that way.

J
17 October 2014 at 08:00 #166742
derek blake
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@derekblake72550
Sadly it would be a full machine, I have no blanks either
17 October 2014 at 08:09 #166743
JasonB
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@jasonb
Fair price then.

J
17 October 2014 at 16:38 #166781
derek blake
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@derekblake72550
I managed to get a gear set for £175 today, all teeth cut but still have machining that needs doing to them like the square hole and the spoke shapes cut.

probably cost me more to get that machined than the parts themselfs
9 November 2014 at 21:03 #169142
derek blake
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@derekblake72550
Could anyone advise on ready made safety valves that could be fitted to my engine? I've hand made engine parts but don't want to tackle safety valves.

The engine is a 2 inch scale ruston proctor, and around 24 inches long.

Thanks in advance.
29 November 2014 at 19:16 #171019
derek blake
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@derekblake72550
Any ideas on ready made safety valves?

Regards Derek
29 November 2014 at 20:00 #171027
JasonB
Moderator
@jasonb
Bruce engineering and Blackgates both do valves that could screw into a threaded cover to the regulator chest, won't look quite right but will save you having to make them.

As to what size you will need thats a different matter

Edited By JasonB on 29/11/2014 20:01:11
29 November 2014 at 21:11 #171037
derek blake
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@derekblake72550
Thanks for the response, I have found the fitting size but was concerned on the pressure they would blow at.

Not sure how you work out what that should be,

Regards Derek
30 November 2014 at 01:13 #171046
Paul Lousick
Participant
@paullousick59116
Hi Derek,

The pressure relief valves should be set at the maximum working pressure of the boiler. They can be set lower but should not exceed the working pressure. The Australian code only allows 100 psi. I think it is higher in the UK. You need to check your boiler code or ask your boiler inspector.

Paul.
30 November 2014 at 07:43 #171051
JasonB
Moderator
@jasonb
The other factor that you need to think about as well as pressure is the volume of steam they need to allow out.

No good fitting a small valve if it will not let the steam out faster than it is being made. For the steam test the valve needs to open at the working pressure and then not let it rise more than 10%. Best to fit a slightly larger one or two are somethines seen on traction engines as they look a bit more like the Ramsbottom type safety valves.
30 November 2014 at 08:58 #171055
derek blake
Participant
@derekblake72550
Thanks for your help, I have found two on a website. Going to email the shop to check realise pressure settings.

Maybe even send a drawing to there engineer to be safe, last thing I want is to get this bit wrong.

Derek
30 November 2014 at 09:16 #171058
derek blake
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@derekblake72550
I found these.
4 December 2014 at 20:37 #171561
derek blake
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@derekblake72550
Would two of these be safe? There the correct fitting.

Regards Derek
4 December 2014 at 20:56 #171563
JasonB
Moderator
@jasonb
They are the right type but don't know what pressure the go off at or how much steam they will allow through so can't say if they will do
4 December 2014 at 21:15 #171566
derek blake
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@derekblake72550
Good points, if my engine runs on 85psi should they be set below that? I could ask them to set them if there adjustable.
4 December 2014 at 21:16 #171567
derek blake
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@derekblake72550
5 December 2014 at 13:41 #171619
JasonB
Moderator
@jasonb
Again without knowing the pressure the Maxitrak one you linked to is designed to cover Its hard to say. Also there is no indication of the size of boiler it is designed for so the steam passages may be too small. And they don't list them with a 3/8 x 32 thread so another reason they could be too small
5 December 2014 at 19:17 #171643
derek blake
Participant
@derekblake72550
Hi Jason.

All good fair points, they have told me they would be ok for my scale engine as they do the correct thread size.

However I'm still abit nervous that they would be ok, I'd say ready made is still safer than an home made.,especially if not made them before.

I will have to try and email them a drawing to ask there engineer, they must have an idea if selling steam parts.

Regards Derek
5 December 2014 at 19:30 #171645
derek blake
Participant
@derekblake72550
My boiler being 10 and 3/4inch in length
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