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All Springer/NP/PCP Air Gun Discussion General => PCP/CO2/HPA Air Gun Gates "The Darkside" => Topic started by: Vmaxpro on July 16, 2020, 11:47:51 PM

Title: Brocock magnum valve seat
Post by: Vmaxpro on July 16, 2020, 11:47:51 PM

Anyone ever succesfully get a metal valve to seal on a metal seat? The valve in my brocock is steel, on what looks like a heat treated seat, almost reminds me of heat treated 440. I dont think its removable, not that I need to. But for the life of me I cant figure out the material. And let me tell you this thing will hold air forever. And u can hand pump it no problem from totally empty. Looking at the valve under a 20x you can tell its been lathe turned, and not lapped. Im just now venturing into making my own valves and from all the other valves ive seen, this one stands out. It works great to, Im making 75 ftlbs on it with a super light hammer and a very short stroke. Its effortless to crack the valve.

Title: Re: Brocock magnum valve seat
Post by: darkcharisma on July 16, 2020, 11:50:42 PM

i wish to see pictures? i cant imagine what is being described.

interesting its steel on steel.

Title: Re: Brocock magnum valve seat
Post by: Vmaxpro on July 17, 2020, 12:12:57 AM

Its down deep in the gun, and your not going to get it out I dont think. Its a brownish tint, definitely not plastic, could be a type of hard anodize on aluminum? I might contact aoa to see if they know. Im dying to find out!

Title: Re: Brocock magnum valve seat
Post by: darkcharisma on July 17, 2020, 12:53:56 AM

any pics would help. shine a light down and take a pic. i am dying to know what it looks like

i am thinking metal on metal cant seal?

Title: Re: Brocock magnum valve seat
Post by: Vmaxpro on July 17, 2020, 02:21:03 AM

Heres the valve and I think this might be the seat, if it is, thats for sure a plastic. Ive got the gun back together but tapping on the outside edge with a oring pic certainly “ sounds” like metal? Its so hard to tell. Someones got to know!

Title: Re: Brocock magnum valve seat
Post by: mcoulter on July 17, 2020, 03:12:56 PM

Following!

 :o

Title: Re: Brocock magnum valve seat
Post by: KnifeMaker on July 17, 2020, 08:19:36 PM

If the pic of the piece from Spares" is the same, it appears to be peek. it is widely used in the custom side of air gunning, but not as much in the manufacturing end. Sadly, as it is a super material.


For what it is worth, 440 stainless is a family of steels, Not a single type. I doubt seriously it could be used. Not even the softest of the 440's which is 440-A.


KnifeMaker
 

Title: Re: Brocock magnum valve seat
Post by: Rallyshark on July 18, 2020, 03:04:48 AM

I agree with knife.  It certainly looks like some form of PEEK.  There are many different variations of it, and with different chemical properties.  Think of it as a sort of "plastic alloy".  There are some that have an almost metallic ring/feel to them.  Great stuff! 

Title: Re: Brocock magnum valve seat
Post by: rsterne on July 18, 2020, 02:44:16 PM

Lloyd Sikes had limited success with steel on aluminum.... but the hardest material commonly used in airguns to work with steel is PEEK....

Bob

Title: Re: Brocock magnum valve seat
Post by: darkcharisma on July 19, 2020, 12:16:38 AM

Now that i looked at it closely, its certainly not metal. it doesnt shine like metal. the shine that it does get is from polished peek-like around the edges.

stick a magnet to it.