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Allchin

This topic has 7 replies, 5 voices, and was last updated 30 September 2019 at 19:53 by JasonB.

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27 September 2019 at 13:44 #2923
RICHARD CALLIS
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@richardcallis11658
Building the boiler
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27 September 2019 at 13:44 #430732
RICHARD CALLIS
Participant
@richardcallis11658
In the 2018 boiler guide it states that either the water gauge or injector can be fed from the manifold but not both. Has anyone overcome this.

Cheers

Richard
27 September 2019 at 13:58 #430735
Paul Lousick
Participant
@paullousick59116
The Australian code for model steel boilers states that the water gauge shall be connected to the boiler independent of all other fittings, including the steam manifold. Reason being that any take-off of steam to a fitting attached to the water gauge will lower the pressure and will give a false reading in the gauge.

Paul.
27 September 2019 at 15:05 #430749
GoCreate
Participant
@gocreate
Posted by RICHARD CALLIS on 27/09/2019 13:44:08:

In the 2018 boiler guide it states that either the water gauge or injector can be fed from the manifold but not both. Has anyone overcome this.

Cheers

Richard

I've built a 3" Allchin with a steel boiler.

I fitted a plug between the two ports on the manifold, then ran a pipe from the boiler to the other end of the manifold so that the manifold is fed from both sides and each side only feeds one outlet.

My boiler has two ports under the crankshaft, I used one of these, I fitted a custom low profile elbow to it and ran the pipe under the gears and up to the manifold, it's a bit tight but easy enough to find a route that does not clash with anything moving. I used 1/4" pipe.

If you're building a 1-1/2" with a copper boiler then maybe you can add a threaded bush to the top of the boiler in a suitable location.

Nigel

Edited By tractionengine42 on 27/09/2019 15:29:55
27 September 2019 at 16:11 #430756
Former Member
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@formermember19781
[This posting has been removed]
30 September 2019 at 19:14 #431233
RICHARD CALLIS
Participant
@richardcallis11658
I would like to thank everyone for get back to me with their comments.

My next stage is to split the manifold and at the forecoming model show look at finished models to find a point in the boiler top where I can fit an extra bush.

I will update you when I have the answer

Cheers

Richard
30 September 2019 at 19:39 #431238
JasonB
Moderator
@jasonb
Bill, you must be looking at different engines to me. The first three on station road steam all have the water gauge, injector feed, water lifter feed and pressure gauge all off the same manifold as per the drawings.

Richard, at the end of the day it will be your boiler inspector who will have the final say so talk through any solution swith him before cutting metal.
30 September 2019 at 19:53 #431245
JasonB
Moderator
@jasonb
This photo shows the manifold that fixes to a pad on the top of the boiler so all 4 items are off the manifold

One option may to enlarge the front left fixing hole and use a banjo type fitting and run a short length of pipe from that to the top of the water gauge. Though check clearance to gears.

Edited By JasonB on 30/09/2019 19:56:12
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