We need more 4.5k Flatline Reg Seats!

[captian pinky]

From an engineering perspective, is there a different way to solve the problem?

They are different on the 3k flatlines. They use an oring instead of the urethane disk. My guess is the oring did not hold up as well as 4.5k and TK changed the design.

Generally i think the design is fine and machining a single or multiple casting molds is probably pretty doable. The problem is finding the correct material.

[luke]

From an engineering perspective, is there a different way to solve the problem?

[captian pinky]

What do the two surfaces that need sealed look like? Any chance there's a CAD drawing of the reg?

the base where the seat sits is flat like a typical classic valve reg seat. The reg pin that seals on it is tapered

[luke]

What do the two surfaces that need sealed look like? Any chance there's a CAD drawing of the reg?

[captian pinky]

Anyone happen to do any digging into the material?
anyone happen to have a bad one? maybe we can send it off to be tested for hardness and material makeup?

[Tunaman]

I do not know what it was made of. I am pretty sure they came from Germany. The secret to these lasting was to filter the air going into the regulator, and not take the 2 halves apart until something fails. Just like a regular Automag, the 2 halves will never go back in the same spot.

[captian pinky]

You are correct in the assy instructions. To remove the old one I take a 1/8" T handle allen wrench and push down on the piston until it is flush with the reg seat, then switch to the 3/32" allen wrench. Do not try to pull it off as it wont come off and you will bend the pin.

Noted, Thanks.

Do you happen to have any info on the actual material that was used?

[Tunaman]

Sounds like the correct way to install them is to put the reg seat in the 2 halves and drive the piston through the center with the adjustment screw.

honestly i'm more concerned about the removal than the installation, but i guess it could be cut off.

You are correct in the assy instructions. To remove the old one I take a 1/8" T handle allen wrench and push down on the piston until it is flush with the reg seat, then switch to the 3/32" allen wrench. Do not try to pull it off as it wont come off and you will bend the pin.

[captian pinky]

The average Joe could not change one of these correctly if you didnt know what you were doing. The reg piston bends very easily if you dont install this reg seat correctly. They were VERY hard.

Sounds like the correct way to install them is to put the reg seat in the 2 halves and drive the piston through the center with the adjustment screw.

honestly i'm more concerned about the removal than the installation, but i guess it could be cut off.

[Tunaman]

The average Joe could not change one of these correctly if you didnt know what you were doing. The reg piston bends very easily if you dont install this reg seat correctly. They were VERY hard.

[captian pinky]

I did some digging today on AO and a few other forums and here is what i found.....

I found a few references to the material.
Simon mentions that it is 90durometer urethane. I think this is the old red material.
Dayspring mentions it is 98 durometer, but does not list urethane. Based on the conversation and mentioning that it was around cup. It sounds like this is the new white style reg seat.

I did see reference to the white reg seats being made in europe and that John Sosta may have done some of the testing on them. I sent John a message today and hopefully he will follow up with some info. Have not heard from him yet.


There is a bunch of talk about the issues being that the original red reg seats did not have holes punched in the center and how that may have caused issues as well as the cone shape in the center not matching the reg piston sealing surface and as a result they changed the design some.

I have attached pics of the single 4.5k reg seat i have.

[nak81783]

No promises, but I may be able to help. If someone sends me a scrap one (not one being held back for dimensions), I can check durometer at work. If it’s a urethane we use (or something similar), I could probably cast some if a mold were provided.

[captian pinky]

Literally one of the worst choices for an adjustable reg.

Convince Dan Colby to make a new Armageddon

I did reach out to Jon Colby to see if he would tell me what material they use for the hard reg seats. I think that is just standard urethane but it seems really hard.

I can think of at least 4 that need reg seats from people that use them. I do like the armageddon too. That is what i use for my tech bench.

[BigEvil]

Literally one of the worst choices for an adjustable reg.

Convince Dan Colby to make a new Armageddon

[captian pinky]

I think Tim had to check with Dave per my last conversation with him.


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