[modeleng] Re: clack valves

I have never done it that way Wilfried, but I will certainly give it a try, 
I like the no bashing .

E.W.
----- Original Message ----- 
From: "Wilfried Vermeiren" <vermeiren.wilfried@xxxxxxxxx>
To: <modeleng@xxxxxxxxxxxxx>
Sent: Wednesday, March 18, 2009 12:25 AM
Subject: [modeleng] Re: clack valves


>
> Hi,
> I second Tel's manner of making a little volcano. Sounds terrifying .
> Wherever possible I always try to make the seat removable from the body of
> the valve. usually I end up with a sort of screw in plug. Made in this way
> things turn into a simple straightforward turning job. No poking into 
> blind
> holes.
> This is my way.
> Turn and finish the plug complete with the screw tread and all. Save the
> hole till last and drill it the pilot size for a reamer of the correct
> diameter. Now set a side cutting tool so it bevels off the top face of the
> plug , say 5° is ample. Take care to form the taper straight up to the 
> hole.
> Don't leave a flat !!. Now run a hand reamer into the hole but don't do it
> right true, just clean up the entrance with the taper part. The result
> should be a nice clean sharp edge.
> Last operation is to lay a peace of drawing paper on the surface plate. 
> Take
> a NEW ball of the right size, place the seat on to and scribe a figure 8
> with only a little pressure.
> Mount the lot in the body of the valve and there you go.
> When the leaking starts after a while. Just dismantle and put in the plug 
> in
> the lathe and repeat the facing, reaming and figure 8 with a new ball and
> things are back to new.
> Regards
> Wilfried Vermeiren
> http://users.skynet.be/modelbouw.wilfried
>
>
> -----Oorspronkelijk bericht-----
> Van: modeleng-bounce@xxxxxxxxxxxxx [mailto:modeleng-bounce@xxxxxxxxxxxxx]
> Namens TEL
> Verzonden: dinsdag 17 maart 2009 20:05
> Aan: modeleng@xxxxxxxxxxxxx
> Onderwerp: [modeleng] Re: The ban on paint stripper and clack valves
>
> If you grind a slight angle on the D bit you use to cut the seat, so
> that it forms a little 'volcano' in the bottom of the hole, you will
> make a perfect fit every time with a bit of a whack with a ball and
> brass drift. I've made quite a lot of 'em, and pumps, and never had to
> do one twice.
>
>
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