Valve mod - pcp pistol

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   The pin is around 3 - 4mm dia, so while a chisel material is perfect, it's too big.

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Pauly5 Members Profile Send Private Message Find Members Posts Add to Buddy List Forum Moderator Joined: 11 Mar 2013 Location: Titahi Bay Status: Offline Posts: 1561	Post Options Post Reply Quote Pauly5 Report Post Thanks(0) Quote Reply Posted: 05 Sep 2024 at 5:02am
	The pin is around 3 - 4mm dia, so while a chisel material is perfect, it's too big.

J-S Members Profile Send Private Message Find Members Posts Visit Members Homepage Add to Buddy List Senior Member Joined: 20 Oct 2014 Location: Auckland Status: Offline Posts: 453	Post Options Post Reply Quote J-S Report Post Thanks(0) Quote Reply Posted: 05 Sep 2024 at 4:54am
	ooh looks interesting
	J S Airguns Air Arms TX200('s) Theoben Sirocco HW77 FWB 300s Webley Patriot One or two others... Current projects: Too many..

kruzaroad Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 03 Jul 2022 Location: Hastings 4 now Status: Offline Posts: 2492	Post Options Post Reply Quote kruzaroad Report Post Thanks(0) Quote Reply Posted: 05 Sep 2024 at 4:30am
	Question, would chisel shaft be better?, as they are designed to take to be hit. You puting a regulator on it?

Pauly5 Members Profile Send Private Message Find Members Posts Add to Buddy List Forum Moderator Joined: 11 Mar 2013 Location: Titahi Bay Status: Offline Posts: 1561	Post Options Post Reply Quote Pauly5 Report Post Thanks(0) Quote Reply Posted: 05 Sep 2024 at 4:03am
	Valve body out of aluminium, the seat made out of stainless and I will use stainless for the opposing valve pin seat too. My plan is to make the pin out of a screw driver shaft and then use valve grinding paste to bed them in with each other. That's the plan. I could make the whole pin and seat out of stainless, but I wasn't sure how well it will handle being struck by the hammer, where the screwdriver shaft is hardened.

nunga Members Profile Send Private Message Find Members Posts Visit Members Homepage Add to Buddy List Admin Joined: 09 Mar 2013 Location: Pukekohe Status: Offline Posts: 1050	Post Options Post Reply Quote nunga Report Post Thanks(0) Quote Reply Posted: 05 Sep 2024 at 3:48am
	what are you making the value out of?
	2nd place HP springer - WFTF World Championships 2014

Pauly5 Members Profile Send Private Message Find Members Posts Add to Buddy List Forum Moderator Joined: 11 Mar 2013 Location: Titahi Bay Status: Offline Posts: 1561	Post Options Post Reply Quote Pauly5 Report Post Thanks(0) Quote Reply Posted: 04 Sep 2024 at 4:41pm
	After a long break from doing anything creative I have started on a new pistol build. This time I am making the valve differently. After some advice from fellow gunners and also copying a proven design I started. Instead of trying to form a good seal on a surface within the valve body I am making the valve seat out of stainless and it will sit in the body, but can be removed/replaced if needed. You will see in the photo an FX Bobcat valve stem and seat, and next to it my valve seat with O ring groove cut into it and the valve body behind. Next stage is the valve stem with sealing surface.