Airforce AirForce Talon valve won't seat in Huben Max-ATH Universal Regulator

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RWL

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Feb 8, 2025
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Central PA
I bought (from a Huben authorized vendor in the US) a Huben Max-ATH 50cc Universal regulator for my AirForce Talon SS, pre-Spin-Loc. The valve won't fully screw into the regulator, leaving about a 3/32" gap between the valve's base and the regulator. It looks like it needs a relief cut in the regulator threads to accommodate the small collar at the base of the valve. I don't know if this is a manufacturing defect or not at this point. I have an email in to the vendor and he responded promptly and said he'd never seen that problem but that he'd do some looking and check for me. The group here is perhaps a larger universe, so I thought I'd post the photos here and ask if anyone else has seen this.
01 Whole regulator w my valve partially installed - cropped - & w arrow.jpg



Notice the collar at the base of the threads of the AirForce valve
08b Valve's Tank threads closeup - annotated (Large).jpg


No matching relief cut at the start of the threads in the Huben regulator
09a Regulator inlet (Large).JPG


The collar is the same diameter as the crests of the threads
07b Collar at base of tank threads 0.713'' (Large).JPG


I'll keep the vendor out of this at this point. I think he's trying to figure out what happened too. I wonder if this is a one-off manufacturing defect where somebody forgot to put the relief cut in for the collar, or a design flaw that Huben hadn't anticipated. Anybody else seen this?
 
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RWL said:
I bought (from a Huben authorized vendor in the US) a Huben Max-ATH 50cc Universal regulator for my AirForce Talon SS, pre-Spin-Loc. The valve won't fully screw into the regulator, leaving about a 3/32" gap between the valve's base and the regulator. It looks like it needs a relief cut in the regulator threads to accommodate the small collar at the base of the valve. I don't know if this is a manufacturing defect or not at this point. I have an email in to the vendor and he responded promptly and said he'd never seen that problem but that he'd do some looking and check for me. The group here is perhaps a larger universe, so I thought I'd post the photos here and ask if anyone else has seen this.
View attachment 546898


Notice the collar at the base of the threads of the AirForce valve
View attachment 546900

No matching relief cut at the start of the threads in the Huben regulator
View attachment 546901

The collar is the same diameter as the crests of the threads
View attachment 546902

I'll keep the vendor out of this at this point. I think he's trying to figure out what happened too. I wonder if this is a one-off manufacturing defect where somebody forgot to put the relief cut in for the collar, or a design flaw that Huben hadn't anticipated. Anybody else seen this?
Click to expand...
Mine are fine, 2 for 2.
What is the source for the tophat valve?

My two are
Trajectron high flow, left
Aliexpress High flow right


20250313_150641.jpg20250313_151236.jpg
 
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The vendor in the US is an authorized Huben dealer. He got a nonsense response from Huben along the lines of "the threads are worn and that's why it won't screw into the regulator" I'm working with the vendor and hopefully the Huben customer service rep didn't understand the problem. I sent an updated photo illustrating that tanks from AirForce have a recess prior to the threads.

09c Bottle threads with recess for collar - annotated (Large).jpg
 
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The vendor sent me a replacement thinking that the first one might have just been a single dud, but the 2nd one has the same problem. He contacted Huben and they're going to make a one-off regulator with a recess for me to confirm that that solves the problem. I'll give you all follow up when I know more. There is a time lag, but so far it's confirming that Huben is responsive to customer input as mentioned by Air Shootist on Youtube.

This is a #36 wire drill (.106" dia.) that just fits in the gap that won't close on the 2nd regulator.
13 No.36 drill .106'' fits in gap (Large).JPG


I mocked it up in my Talon anyway. The length of pull went from around 14" to 18". Shooting offhand will require supporting it from the base of the trigger grip rather than the fore end. If Huben's U regulators weren't so expensive I would have preferred that to keep the length manageable.
11 Length of pull 18'' (Large).jpg
 
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RWL said:
The vendor sent me a replacement thinking that the first one might have just been a single dud, but the 2nd one has the same problem. He contacted Huben and they're going to make a one-off regulator with a recess for me to confirm that that solves the problem. I'll give you all follow up when I know more. There is a time lag, but so far it's confirming that Huben is responsive to customer input as mentioned by Air Shootist on Youtube.

This is a #36 wire drill (.106" dia.) that just fits in the gap that won't close on the 2nd regulator.
View attachment 548967

I mocked it up in my Talon anyway. The length of pull went from around 14" to 18". Shooting offhand will require supporting it from the base of the trigger grip rather than the fore end. If Huben's U regulators weren't so expensive I would have preferred that to keep the length manageable.
View attachment 548968
Click to expand...
You could go with the shorter fatter bottles.
Alsafe has a 0.6L 75mm diameter and only 235mm long, around 8.5". Bit pricy on AliExpress, you can buy 2 on Alibaba for the same price.

I have Acecare 1.1L on mine, same 235mm length but 110mm diameter. There are angled connectors to tip the bottle down. Or use the Cricket Dream Universal drop block to drop it 50mm.

End of the bottle works as a buttstock. However, I'm having custom buttstock made by Jake at jb3dpd.com.

.22 Talon with Dream valve. The 25CC plenum is okay, the 50cc in the MAX-ATH is better.
20250322_085950.jpg
 
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The Vendor and Huben made good on sending me a new style Regulator body with a relief cut for the Talon valve and the new regulator body arrived on Friday. Tom at High Pressure Pneumatics in Michigan was the vendor and went to bat for me with Huben. Also good for Huben for listening to customer problems and solving them. Photos below.

Comparison of the new and original regulator valve inlets
02 New-left and Old-Right - Annotated (Large).jpg


The relief cut to allow the unthreaded area of my AirForce Talon valve to fully seat
03 Closeup of Relief cut for valve - w arrow (Large).jpg


Fully assembled with test cap on regulator. Y'know you can get about 10 shots with the little bit of air stored in that test cap. That surprised me. It's a lot faster to unscrew the little test cap, make a regulator pressure adjustment, and refill the little test cap rather than a whole bottle. No surprise there, but in one of the other threads, another reader was confused about what that cap was for so I thought I'd mention it.
07 New Regulator body assembled - w test cap (Large).JPG


Filling it for the first time. Even with a hand pump this would have been a long process to fill the test cap. It was interesting that the pressure built slowly up to around 10 MPa and then from 10 to 20 MPa (3000 PSI) the pressure went up pretty quickly. Unlike filling an empty bottle, you can't walk away while doing this.
10 Pump attached to regulator (Large).JPG


The gages read in Pascal units. Gage for the "tank" filled to 20 MPa = 3000 PSI 1 MPa = 145.038 PSI
11 Closeup of Regulator tank pressure gage in MPa (Large).JPG


Gage for the regulated pressure reading 13 MPa = about 1885 PSI In this regulated pressure range even an 1/8th turn of the adjustment knob makes a big change.
12 Gage for Regulated Pressure set for 13 MPa = 1885 PSI (Large).JPG



I set up the chronograph for a quick velocity test in my back yard. The LabRadar, even with a mechanical trigger was having difficulty picking up the pellets because I didn't have a target out. I managed to get two readings though, 697 fps and 685 fps with Talon set to spring tension of 10 using Crosman Premier pellets - about 15 Grains from memory.
 
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