Jack Haley PCP tubes

Jack Haley PCP tubes

Joined: August 16th, 2006, 10:39 pm

December 8th, 2010, 7:51 am #1

Does anybody know if Jack Haley has been fitting delrin valve stems to his PCP tube valves??

I would call him but don't wanna bug him since he is a busy man....

tryin to decide what I need on hand when it gets here to convert my old reliable QB78D
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Joined: February 16th, 2006, 6:03 am

December 8th, 2010, 12:09 pm #2

Tom

The valve stems will still be steel, it is only the valve face sealing onto metal that can be delrin...

Malan
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Joined: August 16th, 2006, 10:39 pm

December 8th, 2010, 7:28 pm #3

I understand that thanks what I am wondering about is the sealing surface replaced within the brass head with Delrin or are they like these?



Are these Delrin heads just pressed on the stem, or are they threaded onto the stem, or are they glued??

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Joined: July 28th, 2006, 9:40 pm

December 8th, 2010, 8:26 pm #4

Don't know about Jack Haley stems , but the delrin ones i have from RFM are threaded.
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Joined: August 16th, 2006, 10:39 pm

December 8th, 2010, 8:32 pm #5

I can make up a new delrin head if I can find that delrin leftovers I had just in case the stem goes bad quick.

Rich is from my state but he went into semi retirement...he always was a busy guy....bout time he had some fun. I have seen him at the SWMAGC shoots he is a deadly shot with his Edguns at 100 yards
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Joined: September 28th, 2006, 7:53 pm

December 8th, 2010, 8:32 pm #6

I understand that thanks what I am wondering about is the sealing surface replaced within the brass head with Delrin or are they like these?



Are these Delrin heads just pressed on the stem, or are they threaded onto the stem, or are they glued??
Tom Jacks QB PCP tubes come with a valve and the valve already has a valve stem in it. Just put your QB parts on this pcp tube and your good to go. I have made valve stems out of nylon and delrin and I just drive a QB stem minus the head into a piece of delrin.Just make sure you drive it in straight. Once I drive it in I just true it up on the lathe. The only problem I had with Jacks stem is it always had a slow leak. Fill gun to 2500 - 2600 p.s.i. and in 24 hours gun was empty. Replaced Jacks valve with slightly modded QB valve and a Roy Weid valve stem and no more leaks. HTH. Benson.
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Joined: August 16th, 2006, 10:39 pm

December 8th, 2010, 8:34 pm #7

nt
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Joined: September 28th, 2006, 7:53 pm

December 8th, 2010, 8:41 pm #8

NO it was home made. It did not seal on the valve seat as they usually do. He just turned it down to 60 degrees and it fit in a hole like a plug. The material he used just may have been to hard that is why the leak. Any way don't leak now. Benson.
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Joined: August 16th, 2006, 10:39 pm

December 8th, 2010, 9:26 pm #9

Istall tube as is do a string look for sweet spot pressure. If it leaks its a hard stem seal so I could spot face the valve seat and lap it in. Now just to wait for it to get here
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Joined: September 28th, 2006, 7:53 pm

December 8th, 2010, 9:52 pm #10

Tom if I'm understanding you there is no seat just a hole 7/64'' - 1/8''. I have not see anything like that before.Actually when I cot my pcp tube 1 year ago it did not hold air at all. There was a mashed up oring on the fill assembly but no o ring groove cut in this assembly so using any kind of o ring was useless. I ended up using 2 wraps of teflon tape on the plug whick did work but I have since cut a proper o ring groove when I changed his valve. Hopefully your tube will not have these issues. I ordered 2 of these and my friends had more problems then mine did. He complained to Jack and he offered to refund his money. I milled a 4130 chrome moly piece of tubing of my own foe a QB a couple months ago and put another one together and at 2850 p.s.i.it hits 1000 f.p.s. with a 14.3 and 850 wirh a Kodiak 21. gr. Anyway these QB homemade pcp's are kind of cool. Good luck with yours Tom. Benson.
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