90 degree/elbiw ball valve

[WetHeader]

Hi all,

I'm currently re doing the regulator on my simplex, as the old was was beyond serviceable. I'm wanting to fit a gas type ball valve. However due to limited space in the dome, I was wondering if anyone had fitted a 90 degree/elbow type ball valve to their engine and if so, where did you aquire it from?

Thanks

[jo479]

I think most builders using gas valves fit them in the Smokebox, ow big is the regulator bush in the backhead, I use a 7/8" dia brass tube with a taper screw, I'm sure that was what Martin Evans drew for Simplex, mine's been working for 40 years without any problems, as in all my locos, I do have a Stroudley in my Princess of Wales, the least said about that the better.

[pault]

Have a look at
hoses.co.uk/product/valves/ball-valves/pvc-ball-valves/type-bv07-female-x-female-bspp-right-angled-full-flow-ball-valves/?attribute_pa_thread-size=1&gad_source=1&gclid=Cj0KCQjwwuG1BhCnARIsAFWBUC3FVUJ2TonjhYJS9iRAGsvD_CdiTBnSDca7zqvt-Ma31cseNRMHQZ4aAiIcEALw_wcB

I have used a number of these half inch valves in 7 1/4 locos without any problems. if you google 90 degree ball valve there are a few

Regards
Paul

[johan]

Don't a lot of these valves use some "plastic" parts inside? How do they behave with steam if that is the case?

[uuu]

It's better to get stainless steel bodied versions rather than brass - to avoid dezincification.

And yes, they have some PTFE seals inside, but these are usually suitable for the steam temperatures we encounter.

Wilf

[JonL]

I specifically purchased a ball valve that was rated for steam and high temperature gases. Mine is mounted in the smokebox. I mad a banjo union to fit in the end to allow me to make the 90 degree turn before it hits the petticoat pipe (this was in a 3.5" LBSC Britannia). It's been very successful. Never had a regulator that sealed 100% before! I've been using it for a year now, I would guess at around 100 hours in steam. No sign of degredation of any kind.