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Reg stacks only

Huma reg for MK1 Crown with 8mm OD bellevilles.

I have been using 12 x 0.3 for running at 52 bar arranged as ()()()()()()

Just building a reg now for 75 bar and using 11 x 0.4 arranged as ()()()()()( with the singleton ( towards the plenum.
 
FX AMP reg with 10mm OD bellevilles

I run 11 x 0.4 arranged as )()()()()() with the singleton ) towards the reg body. This is the stack I use for set pressures between 50 and 80 bar.
 
Good post Mr Lout

the 52bar reg was on a 500mm liner in 177

The new stack at 75 bar is for a 340mm solid hft barrel in 177

All figures painstakingly researched by the best Crown fiddler in town to be optimum for that gun
 
Just taken the reg out of a MK2 Crown, one of the earlier ones with the older style hammer adjuster wheel. Reg anti taper was still in situ (well it was untill the owner who shall remain nameless @NEJ, did I just say that out loud? wound the set screw out and blew a seal [definitely wasn't ice cream])

Stack was 10x0.53 discs arranged as ()()()()() and the height was 7.96mm.

From previous playtimes IIRC this will support 175'ish bar.
 
@btmaldon @Neil54 if you are not aware, and as general info for others.

Bellville manufacturers technical specs advise orientations where the rim of the concave face bears on a flat surface, I.e., ]), is incorrect. The reason is the diameter expands when pressure is applied. Under high loads this results in frictional forces opposing compression. If placed in opposing pairs, e.g.,() or (()), the rims expand together so friction is minimised. It seems some reg/gun manufacturers don't know, or ignore, this.

Friction in the action can only add to irregularity in performance so I would suggest anyone who uses asymmetric assemblies might investigate other options.
 
BallisticBill said:
@btmaldon @Neil54 if you are not aware, and as general info for others.

Bellville manufacturers technical specs advise orientations where the rim of the concave face bears on a flat surface, I.e., ]), is incorrect. The reason is the diameter expands when pressure is applied. Under high loads this results in frictional forces opposing compression. If placed in opposing pairs, e.g.,() or (()), the rims expand together so friction is minimised. It seems some reg/gun manufacturers don't know, or ignore, this.

Friction in the action can only add to irregularity in performance so I would suggest anyone who uses asymmetric assemblies might investigate other options.
Click to expand...
Don’t worry bill in that picture the end spring washer aren’t in contact with anything
Dunno what’s going on at the piston end
 
btmaldon said:
Gen 3 Huma Reg on Sub 12 M3 Impact .177. Ive set it at 55 bar.

View attachment 749150
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How is the Hume reg performing ?? any better than the AMP ? Have u noticed a movement in the reg gauge from your set point of 55 bar ,when you increase/refill bottle up to max pressure 250 ,i think they call it pressure positive or something like that ?

Be good to know your findings ?
 
Air Head said:
How is the Hume reg performing ?? any better than the AMP ? Have u noticed a movement in the reg gauge from your set point of 55 bar ,when you increase/refill bottle up to max pressure 250 ,i think they call it pressure positive or something like that ?

Be good to know your findings ?
Click to expand...
Im really pleased with it. I tried one a few years back. Must have been the Gen 2 version and it was awful. Really slow recovery.

When I say 55 bar, I set it as close as possible. Currently sitting on 54.84 bar after a week of no use. Recovery rate is far better than the Amp Reg that I had although that wasnt too bad.

I did remove the bottle a couple of weeks ago to fit a new seal and didnt degass the gun. Found the 1st reg must have stuck open and was reading 240 bar. The Huma reg did go up to 60 bar. Took the bottle off, degassed it and refitted the bottle and all returned to normal.

I think if the Huma Reg is fitted properly with the 10 washers instead of 12 like I first did it, it works more like an on off switch and seals really well.
 
btmaldon said:
Im really pleased with it. I tried one a few years back. Must have been the Gen 2 version and it was awful. Really slow recovery.

When I say 55 bar, I set it as close as possible. Currently sitting on 54.84 bar after a week of no use. Recovery rate is far better than the Amp Reg that I had although that wasnt too bad.

I did remove the bottle a couple of weeks ago to fit a new seal and didnt degass the gun. Found the 1st reg must have stuck open and was reading 240 bar. The Huma reg did go up to 60 bar. Took the bottle off, degassed it and refitted the bottle and all returned to normal.

I think if the Huma Reg is fitted properly with the 10 washers instead of 12 like I first did it, it works more like an on off switch and seals really well.
Click to expand...
I must confess that i purchased a Huma mk3 one ,took a month to arrive ,got my AMP mk2 working perfectly by then lol🤣 ,became a expert @ fitting & fiddling with that reg ,and once @ set point the FX AMP it did not move !
The Huma i had to fit as it cost over 💰,no need really for it ,but i installed it into my Crown !

So it was very interesting what you have experienced so far ,had mine for over a month fitted now !

My experience is that it’s that it’s nicely made ,machining of the threads of the housing /body is clean and even ,the piston is made of brass ,well finished ,not sure why the body is alloy ,but is soft ,so you have to be carful of installation as a screw driver can easy turn the edges up !
The valve disc’s save time ,no polishing required of the piston ,so a easy install !
Not sure on there washer stack ,as i alway used ()()()()() ,but installed as )()()()()( as per there instructions /illustration !

How it works perfectly…. FPS are extremely consistent ,the only thing i have noticed is (why i asked ) with more bottle pressure the reg gauge will rise a little ,2-5 bar depending how much i fill !
The FPS remains the same ,sure i read somewhere this is normal with Huma regs !

One other thing i observed was after degassing the plenum & bottle off ,i was surprised when removing the set screw ,it still had air /pressure ,something the AMP never did 🤔

Yes i think all is good ,but i don’t think it’s any better than a proper set up AMP mk2 ,just a little different lol😳
 
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