Recreating ancient seals...

[Levi]

The old local shop I used to go to has closed. I'm going to swing by the new PB/Airsoft store tomorrow and see if they do 4500 fills. If they do then I'd be happy to test in my flatline.

[DocsMachine]

Levi's diagram points out something I missed yesterday, and only realized last night as I was doing up my notes on this: The translucent plastic thing isn't the seal. The seal is in the front piston- as shown in the drawing- and is a simple urethane disc. (That I even already had the right size punches for.)

So a rebuild kit will be even easier than I thought. I'll be ordering up some O-rings (a bunch, actually, I have three or four kits to put together already) and once those come in, I should be able to put together some solid kits in short order.

Still haven't dug out my Sydarm or Bulldog, and still looking for a second Flatline 4500 owner that has access to a full 4500 fill- on a legal tank, hopefully- and can do some solid testing of these new reg seats for me.

Doc.

[ford]

As a person with lots of Dyna/Hyper Flows sitting in my closet collecting dust, this is the most riveting thread on MCB yet.

[Levi]

I just found this gem on my hard drive. The carpet makes me think I may have taken this picture myself. If so, there's a chance I might still have the physical copy somewhere.

[Tracker]

not offhand, ill message you for it

[Levi]

Not sure. I really don't know the Sydarm internals well. I'll measure up those O-rings this evening. Maybe pull my Sydarm apart this weekend and have a look if an expert doesn't come along. The fact that the classic valve kits are available from AGD but the Sydarm kits are not is suggestive that there is something unique going on.

[superman]

Where do those go? I am sure those could be replaced with urethane. Are they thicker than a standard agd oring?

[Levi]

These are the ones I'm suspicious of.

[superman]

Only seal I could think of is a super tiny seal that fits between the top and bottom tube on the sydarm. I have had to replace it once. Other than that everything else should be standard mag orings.

[DocsMachine]

Sydarm?

-Anyone know? I have a Sydarm around here somewhere, but it hasn't seen a 12-gram in a decade. And I'm not sure I've had the reg apart since a few years before that. I can dig it up, too, and have a look, but in the meantime, I'm sure somebody here knows.

Here's what I have archived from way back.

-Looks right, and both the Dyna and the Hyper are identical internally.

yeah, its one of the old stock pre-dye matrix centerflag HPR's... it creeps, i tried to resurface it and thought i did a good job, so there might be some slight dimensional inaccuracies, it did nothing.. but on the plus side it didnt make it any worse...

-Be happy to have a look at it. Do you have my mailing address?

Doc.

[Levi]

Doc is there information out there that list the size and durometer oring specs of those Dynaflow regs? I’d love to try one out since they’re such a neat, compact design.

Here's what I have archived from way back.

[Levi]

Anything else you ladies and gents can suggest?

Doc.

Sydarm?

Ok I'm brushing away the cobwebs to dig this memory out, but isn't there some sort of special secret sauce seal in the Sydarms? In the 2013 to 2014 timeframe I bought a lot of parts from AGD, and ended up placing most of the orders over the phone. The guy running the show there I can't remember his name... Dave maybe? idk. Anyway, a lot of those calls ended up drifting into random topics. Anything from old paintball stories to shooting his AR-10... just random. During one of these conversation we are talking about the Sydarms, and he mentions there is a special seal in there. Won't tell me what it's made of, but says it comes from somewhere on the other side of the Atlantic. He seemed pretty sure nobody would figure out what it was. Now I don't see Sydarm rebuild kits on the AGD site anymore... and inside the one Sydarm kit I have are two kinda fat blue O-rings that don't match anything in a classic or an X valve.

Anyhow, back to tank regs... no rush, but I've got two Dynaflows and one Flatline to service whenever you are ready to sell me kits 😎

[Tracker]

-Well, Dynaflows and Hyperflows were made by Centerflag, so that tracks.



-Which Centerflag? I have those Dynaflow and a Hyperflows on the table now, and have confirmed they use the same internals and seals. (Point in fact, the Hyper, which hasn't been attached to a gun or used in any way, in probably ten or twelve years, still had a couple hundred PSI in it. )

If you've got a Centerflag inline/HPR/foregrip style reg, I'd be happy to take a look at that, too. I'm not sure I've ever had one of those apart- they never seemed as popular as Stabs, Uniregs or CPs.

Doc.

yeah, its one of the old stock pre-dye matrix centerflag HPR's... it creeps, i tried to resurface it and thought i did a good job, so there might be some slight dimensional inaccuracies, it did nothing.. but on the plus side it didnt make it any worse...

[DocsMachine]

I haven't looked, really. That's the kind of thing that I figure was last posted on some long-gone board, and if it got reposted anywhere, it'd be buried in somebody's Facebook feed or something.

I've been working up O-ring specs on each one of these guns I've worked up seals for, I could sure put up a page with the info.

Doc.

[Dusty Bottoms]

Doc is there information out there that list the size and durometer oring specs of those Dynaflow regs? I’d love to try one out since they’re such a neat, compact design.