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Spokesmann
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Joined: 07 Jun 2007
Posts: 10391
Location: Plymouth, UK.
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 Posted: Wed May 07, 2008 8:16 pm Post subject: |
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MAMOD SVs
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oldstuff
Minor 1 - beginner
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Joined: 14 Jun 2007
Posts: 237
Location: Detroit Michigan USA
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| Posted: Thu May 08, 2008 1:43 am Post subject: |
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Safety valve heaven.  Thanks very much!
Ian, those are beautiful. I like those barrel nuts, very classy. The Cyldon sv really interests
me. I like the two-piece shaft, plus the body seems pretty simple.
Regarding the one-piece shaft of the Mamod-type valve, cutting threads doesn't enlarge
the diameter of the shaft, correct?
Mike, thanks for showing the Bowman sv. But may I bother you to explain it having a handle?
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-Chuck
Toy Steam Engine, Twin-Cylinder CSE-3
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Nick
ME1 - more experienced
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Joined: 28 Apr 2008
Posts: 499
Location: Minnesota, USA
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| Posted: Fri May 09, 2008 5:34 pm Post subject: |
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| John Chapman wrote: | | Go for it Nick. They are superbly built and run like a dream. |
Mike, your pictures did do the talking! 
And John, I just did! wave |
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newts
SE2 - steam enthusiast 2 star
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Joined: 15 Jun 2007
Posts: 1265
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| Posted: Fri May 09, 2008 5:52 pm Post subject: |
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| oldstuff wrote: |
Mike, thanks for showing the Bowman sv. But may I bother you to explain it having a handle? |
Chuck, i'm afraid i don't know why there's a handle SV. The earlier Bowman/wormar valves were like this, just to keep things plain & simple 
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Spokesmann
Site Administrator
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Joined: 07 Jun 2007
Posts: 10391
Location: Plymouth, UK.
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| Posted: Fri May 09, 2008 5:53 pm Post subject: |
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| Nick wrote: | | John Chapman wrote: | | Go for it Nick. They are superbly built and run like a dream. |
Mike, your pictures did do the talking!
And John, I just did! wave |
Good man!
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John Chapman
SE2 - steam enthusiast 2 star
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Joined: 13 Jun 2007
Posts: 1471
Location: Cornwall
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| Posted: Sat May 10, 2008 8:25 pm Post subject: |
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| Nick wrote: | | John Chapman wrote: | | Go for it Nick. They are superbly built and run like a dream. |
Mike, your pictures did do the talking!
And John, I just did! wave |
I'm certain you'll love it
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Nick
ME1 - more experienced
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Joined: 28 Apr 2008
Posts: 499
Location: Minnesota, USA
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| Posted: Sat May 10, 2008 8:30 pm Post subject: |
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| About another week and we will know. |
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MFSteam
SE2 - steam enthusiast 2 star
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Joined: 18 Jun 2007
Posts: 1614
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| Posted: Sat May 10, 2008 8:32 pm Post subject: |
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[quote="oldstuff"]
Regarding the one-piece shaft of the Mamod-type valve, cutting threads doesn't enlarge
the diameter of the shaft, correct?
/quote]
yes you are correct, for example if you want to cut a 1/4" bsf thread you turn the diameter to 0.250". cut the thread with a die and if you were to measure the od of the thread you would find it to be 0.002-0.010" down on 1/4".
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www.mfsteam.com the home of the MFTwin and replacement parts for Mamod, Bowman, Hobbies and Cyldon Steam Engines
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