Where do i buy the safety valve for my Polly engine ?

Where do i buy the safety valve for my Polly engine ?

This topic has 4 replies, 4 voices, and was last updated 31 January 2012 at 20:10 by Bill Starling.

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31 January 2012 at 08:37 #83521
Chris machin
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@chrismachin
Hi All , where’s the cheapest place to buy the safety valve for Tubal Cains ‘Polly’ engine and also the steam pipe and fittings e.t.c.

The plan i have says the safety valve needs to be one that blows off at 20lb per sq inch . I know it can be made but i’d rather buy one.

Thanks

Chris.
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31 January 2012 at 08:37 #5908
Chris machin
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@chrismachin
31 January 2012 at 10:13 #83528
JasonB
Moderator
@jasonb
Bruce (polly engineering), Blackgates, Reeves, GLR, EKP, Steam Fittings all sell fittings & valves but prices are liekly to be similar from them all.

J
31 January 2012 at 14:41 #83539
Springbok
Participant
@springbok
Why not have the fun makeing them they are quite simple to make. just make sure the springs are correct type.

Bob
31 January 2012 at 20:10 #83569
Bill Starling
Participant
@billstarling10428
Dear Chris,

If you don’t want to make a safety valve, SMEE suggest buying a Mamod one. (www.mamod.co.uk). The crucial thing is to check what thread you need before making the bush the valve screws into – 1/4 BSF (26 tpi) in the case of Mamod. However, as Bob says, it’s fun to make your own – including the spring. You can hand wind this from 0.5 mm bronze wire using a piece if 1/16 ins rod as a former.

Good luck,

Bill.
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