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Post by Roger on Sept 17, 2015 22:50:36 GMT
Stainless balls not round, that might explain why my boiler clacks leak even after reforming the seats and fitting new balls. I will have to try bronze balls next. If you search eBay for 'ceramic ball bearing', you'll find some Silicon Nitride balls which are used in precision ball races. They are harder than Stainless or Hardened Steel balls and they don't rust. They are also very accurate indeed. You can get them in any size, both Imperial and Metric. Alternatively you can get white Zirconia Dioxide balls which have very similar properties. I haven't had the opportunity to use these myself in a working valve, but they seem ideal to me. |
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fizzy
Active Member
Posts: 10 
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Post by fizzy on Nov 4, 2015 18:03:45 GMT
Hi - question about the application of O ring as seat. Do these require fixing in place? I would expect them to be easily disslodged or simply moved up the clack when in use?
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robmort
Hi-poster
3.5" Duchess, finishing 2.5" gauge A3 and building 3.5" King
Posts: 174
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Post by robmort on Sept 25, 2017 7:54:10 GMT
how is the O ring attached to the clack valve body, ideally the flat bottomed seat needs to be achieved?
Brian
Sorry I missed this question; the o-ring only needs to be held lightly in position and this can be done by making the hole a few thou smaller than the diameter of the ring so as not to distort it, or by boring a slight recess near the seat. Rob |
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cadser
Active Member
Posts: 48
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Post by cadser on May 4, 2019 18:11:49 GMT
What size are your water feed pipes and outlet pipes from the injectors to the boiler?
Mine are all 3/16 i i think they are too small
Bri
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robmort
Hi-poster
3.5" Duchess, finishing 2.5" gauge A3 and building 3.5" King
Posts: 174
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Post by robmort on May 4, 2019 19:07:42 GMT
Depends on the injector. Mine uses 1/8 pipe and works well.
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Post by coniston on May 10, 2019 21:47:03 GMT
Hi Cadser, you don't say why you think your delivery pipes are too small? I have No4 injectors on my B1 Springbok that I've recently finally got into steam. 3/16 water feed, 5/32 steam feed and 3/16 delivery. 100 PSI working pressure. Only problem I have is the Martin Evans steam valves are too restrictive, a bit like LBSC's design the steam has to find its way past the spindle before getting to the outlet union. If I throttle the water a bit they both work dry. Next job is to make new valves where the valve head withdraws past the outlet union, should be perfect then. Hope this helps
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Post by begineur on Feb 3, 2023 20:01:26 GMT
Bonsoir, je ne peux voir ces photos de 2014 qui m'intéressent ! Pouvez vous m'aider ? Merci.
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Post by GeorgeRay on Feb 3, 2023 21:23:40 GMT
The only possible solution is to try to contact the original poster by a PM. However as the original post was 9 years ago they may no longer be accessible.
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Post by begineur on Mar 29, 2023 8:07:52 GMT
La seule solution possible est d'essayer de contacter l'auteur de l'annonce par MP. Cependant, comme le message d'origine datait d'il y a 9 ans, il se peut qu'ils ne soient plus accessibles.
Thank's, I have sent an email today. |
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