Gun Maintenace and Repair - Why is the 98 Valve body tapered?

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Why is the 98 Valve body tapered?

Printed From: Tippmann Paintball
Category: Paintball Equipment
Forum Name: Gun Maintenace and Repair
Forum Description: Important info for keeping your marker in top shape
URL: http://www.tippmannsports.com/forum/wwf77a/forum_posts.asp?TID=171690
Printed Date: 25 May 2026 at 1:11pm
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Topic: Why is the 98 Valve body tapered?

Posted By: tbkahuna
Subject: Why is the 98 Valve body tapered?
Date Posted: 24 November 2007 at 6:33pm

I just bought a replacement valve body for a 98 custom. When I got it, I mic'ed it to see what it measured. It had a definite taper from the O-ring end to the other.

Is that correct, or did I get a reject valve? What is the purpose of the taper? Does the inside of the power tube taper?

Replies:

Posted By: tallen702
Date Posted: 24 November 2007 at 8:31pm

The taper is there for one of two reasons that I can think of. Either the mold in which the power-tube is formed is just made that way, or the tapering allows for easier insertion of the valve into the power-tube and keeps the o-rings from being damaged by forcing the valve into an exact fitting power-tube. My guess is it's the latter. The wider opening allows for the hammer and hammer o-ring to pass into the power-tube body and strike the poppet valve without causing undue wear on the o-ring, and it keeps the valve seal o-ring on the back of the valve from shredding upon insertion as well.

Ask any DMLCD/DM3 owner about o-rings and non-forgiving bodies. The tight tolerances on a Matrix marker means shredded o-rings whenever you put the spool and bolt assembly back in, or take it out.

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<Removed overly wide sig. Tsk, you know better.>