Safety Valves

[Deltic007Participant @deltic007]

[Deltic007Participant @deltic007]

Hi all

I am changing the safety valve on my 3 1/2 lilla locomotive from the sprung cartridge arm type,question is what is recommended for a boiler on a 3 1/2g loco to give enough pressure drop and what particular type is best suited.

Or do i need 2 valves?

Thanks

[nigel jones 5Participant @nigeljones5]

Off the top of my head (which is what I build to!) a 3/16 hole with a 1/4 ball and spring will be more than plenty.

[Deltic007Participant @deltic007]

Thanks Fizz

[nigel jones 5Participant @nigeljones5]

Infact possibly very excessive! This would be better suited to a 5" scale, down size!

[SteambuffParticipant @steambuff]

Fizzy,

Remember that the 3 1/2" Lilla is as big as some 5" loco's (If not bigger, due to it being a narrow gauge loco)

Dave

.

[julian atkinsParticipant @julianatkins58923]

hi deltic,

can recommend you look at Polly online catalogue and choose a suitable Gordon Smith safety valve and spring and drawings etc.

far superior than anything else and will easily satisfy the 'accumulation' test.

cheers,

julian

[Deltic007Participant @deltic007]

Yes I have seen the Polly ones

question is which one is suitable??

[julian atkinsParticipant @julianatkins58923]

i would suggest SV#4

i have no connection with Polly other than being a satisfied customer

cheers,

julian

[Deltic007Participant @deltic007]

Thanks julian

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