[TheForge] Krause/Nazel type air hammer

Fri Dec 13 19:26:05 2002

I'm thinking that high volume in this case means a valve with at least 
the cross section of the smallest restriction in the system (well, maybe 
twice that). If I have half inch ports on my cylinders, there isn't much 
benefit to making the valve flow cross section much bigger than 1". 
Sound like the right idea?

I think spool valves come up in the context of people wanting an option 
to machining their own (i.e. something they can buy).

Steve Smith

Jerry Frost wrote:
> A number of years ago I did the same thing but didn't have anybody to bounce
> it off. And I couldn't find anybody willing to let me take their's apart.
> <sigh>
> 
> In principle it's dirt simple; a pair of synchronized high volume valves.
> What I couldn't resolve to my satisfaction was the travel distance of the
> ram cylinder. All I came up with was a pressure bypass to the return side.
> Like I say, unsatisfactory. (I think)
> 
> Mike's pics of his Onions and Alldays valves didn't tell me how it works but
> did verify my thoughts on valve type. Almost any type of high volume valve
> should work fine, the simpler the better.
> 
> If I can figure out the porting, etc. I'd be tempted to use the simplest
> valves possible, either flap, reed or piston port. My question at this point
> is: Why spool valves? Or are they only on the control/primary circuit with
> another set of valves handling the direct air from/to the rams?
> 
> Frosty
> ------------------------
> If it ain't forged
> it ain't real.
> Wrought iron is.
> The FrostWorks
> 
> Meadow Lakes, AK.
> 
> 
> ----- Original Message -----
> From: "Shannell Sugrue" <[email protected]>
> To: <[email protected]>
> Sent: Thursday, December 12, 2002 10:47 PM
> Subject: Re: [TheForge] Krause/Nazel type air hammer
> 
> 
> 
>>Yeah me too, I drew up an idea I had on how it worked, ran it by an
> 
> engineer
> 
>>friend of mine and he had some suggestions but said it looked good, seemed
>>too simple though, but Ive never seen how this "krause" type valve works
> 
> and
> 
>>it seems pointless reinventing the wheel.
>>
> 
> 
> 
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