Blow down valve

Blow down valve

This topic has 6 replies, 5 voices, and was last updated 28 December 2024 at 17:22 by Andrew Tinsley.

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28 December 2024 at 12:12 #773137
Garry Coles
Participant
@garrycoles69390
Hi, I’m currently consrtucting the BR Standard class 4 Tank Loco 2-6-4 (by Doug Hewson) and one of the things that is on the drawings is called a “everlasting blow down valve” which is situated low down on the front of fire box. I haven’t a clue what this is or how it works. Can anyone please explain this to me.

Thanks

Garry
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28 December 2024 at 12:53 #773143
Nick Hughes
Participant
@nickhughes97026
This might help:-

https://modeleng.proboards.com/thread/15619/everlasting-blowdown-valves

Nick
28 December 2024 at 13:01 #773147
Garry Coles
Participant
@garrycoles69390
Thanks Nick.
28 December 2024 at 13:17 #773151
Baz
Participant
@baz89810
Drawings are in LBSCs Shop Shed and Road book. I think they are drawn for 3 1/2 gauge but easy to scale up or down.
28 December 2024 at 14:03 #773157
Andrew Tinsley
Participant
@andrewtinsley63637
The use of the word “everlasting” is curious. I wonder if it refers to some of the more modern full size boilers. Some of these were fitted with blow down valves that allowed a small quantity of water to continually flow out of the blow down valve. I believe the idea was to remove some of the build up of solids from the boiler, thereby increasing the time between boiler washouts

This did have some unforseen consequences with the condition of the track!

Andrew,
28 December 2024 at 15:22 #773180
Weary
Participant
@weary
Nothing curious whatsoever in the use of the word ‘Everlasting’. It refers to the manufacturing company name. The valve itself is lever operated as required, so not a ‘continuous’ blowdown valve.

Tho’ as you will see from the company publicity they did anticipate the design far outlasting globe valves in use so lasting a very long time.

Phil
28 December 2024 at 17:22 #773194
Andrew Tinsley
Participant
@andrewtinsley63637
Hello Phil,

Thank you for putting me right.

Andrew.
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