EVOL Evol Regulator re seal

[Bladebum]

My gun has seen some field miles, and so today I decided it was time to do a full reseal, including the reg. Needless to say, they were due, I also had a slight bit of green tarnish on the brass piston and adjuster screw from a bit of moisture over time. All of it came clean with a rag wipe. Overall, the job was very simple and I took my time being very careful not to nick any surfaces. I took an overall measurement with the adjuster screw in before I disassembled so I could set it close to the same pressure when done.

Something to note which may cost me, is that the black seal on the end of the piston is not an o ring(like I foolishly thought) but is something more like delrin. I was lightly trying to pull it out with the picks before I realised this, and put a very very small nick in it. It seems to be working ok but would like to replace it down the line. Just a word of warning, don't do what I did.

I used ultimox 226 for the lube on all parts and seals. I put a small amount on the piston where the Bellville ride as well. I do not know if this was needed or not. The rest of the gun I have already replaced seals on before so after the reg was done, the rest of the gun went back together quickly. This was a very easy job, if your considering doing your self just get a set of non marring picks.

 

[Pumacarl]

Whoa! Those orings look pretty rough. How old were those orings? Where you use your gun shouldn't really matter much the only thing the inside of the gun should be seeing is dry air. I still haven't seen the plenums for sale yet but I am going to be changing all mine now too. I did look at my orings this summer and they still looked good so I will be interested to see if just getting old is the problem. It seems to be the problem with a lot of things.

 

[Bladebum]

Whoa! Those orings look pretty rough. How old were those orings? Where you use your gun shouldn't really matter much the only thing the inside of the gun should be seeing is dry air. I still haven't seen the plenums for sale yet but I am going to be changing all mine now too. I did look at my orings this summer and they still looked good so I will be interested to see if just getting old is the problem. It seems to be the problem with a lot of things.

Ya know anymore i just consider o rings what they are, maintenance consumables. They get old, break, wear out, etc which is why I only have guns i can work on and I keep a crap ton of o rings on hand. Those were the original ones in the reg, have never had it apart until today. I have adjusted the reg a whole bunch and those adjuster o rings were ready to blow any minute. I have replaced pretty much all the other o rings on the gun, and all of them looked fine but I wanted a clean slate.

 

[CTAirgunner]

Very nice, the Evol line up really is very simple and easy to work on. This is a good PM idea if you are handy, even if you dont have a need to. Replace them and know they are good vs being out in the field one day and having an issue arise because you have orings that have been in your rifle for 40k shots.

 

[Bladebum]

Very nice, the Evol line up really is very simple and easy to work on. This is a good PM idea if you are handy, even if you dont have a need to. Replace them and know they are good vs being out in the field one day and having an issue arise because you have orings that have been in your rifle for 40k shots.

Exactly! Those o rings have experienced countless fill cycles, temp swings from down to single and up to triple digits, adjustments, 10s of thousands of shot cycles and were somehow still doing thier job..but they were close to done and like the universe would have it, they likely would have blown while out on a hunt ending your day, not at home where its easy to manage. I think I paid 20 ish bucks for a bunch of o rings from o ring store, cheap and easy insurance.

 

[Woogie_man]

Good work, and yes they are quite easy to work on. I always order rings through McMaster Carr and get around 100 in a bag. So PLENTY for rebuilds and future needs.

And always remember to use the correct grease

 

[American Air Arms]

On the piston - 90 duro Poly with Ultimox. Any other combinations will result in excessive friction and poor regulator reset.

Our belevelles are electropolished be the manufacturer, they do not require and extra lube or polishing.

 

[Bladebum]

On the piston - 90 duro Poly with Ultimox. Any other combinations will result in excessive friction and poor regulator reset.

Our belevelles are electropolished be the manufacturer, they do not require and extra lube or polishing.

Thanks for chiming in Tom. I did use all correct o rings, and good to know about the Bellvilles.

This seal here where the adjuster screw meets the piston, is it delrin? Is it possible to source a replacement?

 

[American Air Arms]

Yes, I'll get one to the PAD service department tomorrow. It's hard to tell from the picture but keep in mind our design uses a tapered seat. As long as the seating surfaces (tapered sides) are not damaged it will work fine.

 

[Bladebum]

Yes, I'll get one to the PAD service department tomorrow. It's hard to tell from the picture but keep in mind our design uses a tapered seat. As long as the seating surfaces (tapered sides) are not damaged it will work fine.

Thankyou Tom. Everything has been working fine since airing back up but good to know they can be replaced

 

[pan60]

@ Tom
what is the seal made of? how is it held in just a press fit?

 

[American Air Arms]

Rainbow irradiated unicorn horn.

 

[Bladebum]

Rainbow irradiated unicorn horn.

Knew it, good thing I keep a fair amount of that on hand.

 

[Woogie_man]

That's how he gets these guns shooting so well!! Unicorn farts and toe nails! Just don't ask what he uses for the shroud!

 

[pan60]

Rainbow irradiated unicorn horn.

looking though my stash i found a smaller unicorn horn but it has not yet been irradiated at least i assume not since its still white.
might have to have you do that for me a bit later.

 

[情有独钟]

没错！这些O形圈经历了无数次填充循环，温度波动从个数到三补充，经过多次调整，经历了数万次射击循环，不知道怎么的，它们仍然在发挥作用……但它们已经快要报废了，就像宇宙的那样，它们很可能在你外出打猎结束一天的工作时爆裂，而不是在家里，家里很容易处理。我记得我花了20多美元在O形圈店买了多个O形圈，便宜又容易上保险。兄弟，我想知道调节器上所有 O 形圈的尺寸以及在哪里可以购买它们。谢谢你！

我的枪在野外用了好几英里，所以今天我决定彻底重新密封，包括调节器。不用说，它们也该重新密封了。黄铜活塞和调节螺丝上也因为长期受潮而出现了一点绿色锈迹。用抹布擦一下就干净了。总的来说，这项工作非常简单，我花了不少时间，非常小心，没有划伤任何表面。拆卸之前，我把调节螺丝拧紧后做了一次整体测量，这样完成后就能把压力调到接近原来的水平。

需要注意的是，活塞末端的黑色密封圈并非O形圈（我之前愚蠢地以为是O形圈），而是类似聚甲醛树脂（Delrin）的东西，这可能会让我付出代价。我之前用撬棍轻轻地把它拔出来，才意识到这一点，结果在上面划出了一个很小很小的缺口。它看起来还能用，但以后想换一个。只是提醒一下，千万别学我。

我用Ultimox 226润滑所有部件和密封件。我还在活塞和Bellville活塞之间加了一点。我不知道这是否有必要。枪的其余部分我之前已经更换过密封件，所以在调节器安装完成后，枪的其余部分很快就装好了。这项工作非常简单，如果你想自己动手，只需买一套防刮镐即可。View attachment 3463View attachment 3464View attachment 3465View attachment 3466View attachment 3467View attachment 3468View attachment 3469View attachment 3470View attachment 3471

Thanks for chiming in Tom. I did use all correct o rings, and good to know about the Bellvilles.

This seal here where the adjuster screw meets the piston, is it delrin? Is it possible to source a replacement? View attachment 3476

Brother, I'd like to know the sizes of all the O-rings on the regulator and where I can purchase them. Thank you!

 

[情有独钟]

Yes, I'll get one to the PAD service department tomorrow. It's hard to tell from the picture but keep in mind our design uses a tapered seat. As long as the seating surfaces (tapered sides) are not damaged it will work fine.

Dear Tom, I would like to know the sizes of all the O-rings on the regulator and where they can be purchased. Thank you!

 

[pan60]

I went to toms website and downloaded the oring sheet with all the sizes and figured since it took me a few minutes to search everything out I would post it here.

Will someone that is familiar orings and the sizes please double check and confirm I'm not ordering the wrong stuff?

If everything checks out then others can use the links to quickly make their own oring kits for their evols.

C-026-1070-00
1.5x7mm
70 Buna
Gauge, Foster

1.5mm X 7mm (NBR) Buna-N 70 Duro Metric O-Ring [N1.50X007] : The O-Ring Store LLC, We make getting O-Rings easy!

The O-Ring Store LLC 1.5mm X 7mm (NBR) Buna-N 70 Duro Metric O-Ring [N1.50X007] - Buna-N Nitrile (NBR) Metric O-Rings – 70 Durometer The O-Ring Store LLC provides high-quality Buna-N Nitrile (NBR) Metric O-Rings, engineered for superior sealing performance across industrial, automotive, and...

www.theoringstore.com

C-026-1105-00
1.5x10.5mm
Buna 70
Gauge Spacer

1.5mm X 10.5mm (NBR) Buna-N 70 Duro Metric O-Ring [N1.50X010.5] : The O-Ring Store LLC, We make getting O-Rings easy!

The O-Ring Store LLC 1.5mm X 10.5mm (NBR) Buna-N 70 Duro Metric O-Ring [N1.50X010.5] - Buna-N Nitrile (NBR) Metric O-Rings – 70 Durometer The O-Ring Store LLC provides high-quality Buna-N Nitrile (NBR) Metric O-Rings, engineered for superior sealing performance across industrial, automotive, and...

www.theoringstore.com

C-025-0005-11
Polyurethane 90 Durometer
22 Cal Breech/Bolt

AS568-005 U90 EU Polyether Urethane 90 Duro O-Ring [U90005] : The O-Ring Store LLC, We make getting O-Rings easy!

The O-Ring Store LLC AS568-005 U90 EU Polyether Urethane 90 Duro O-Ring [U90005] - 3/32"ID X 7/32"OD X 1/16"CS Polyurethane: EU Polyether Urethane General Purpose EU Polyurethane rubber is notable for its combination of hardness with elasticity, outstanding abrasion resistance and tear strength...

www.theoringstore.com

C-025-0008-11
Polyurethane 90 Durometer
Regulator Adjuster & Piston
30 Cal. Breech/Bolt

AS568-008 U90 EU Polyether Urethane 90 Duro O-Ring [U90008] : The O-Ring Store LLC, We make getting O-Rings easy!

The O-Ring Store LLC AS568-008 U90 EU Polyether Urethane 90 Duro O-Ring [U90008] - 3/16"ID X 5/16"OD X 1/16"CS Polyurethane: EU Polyether Urethane General Purpose EU Polyurethane rubber is notable for its combination of hardness with elasticity, outstanding abrasion resistance and tear strength...

www.theoringstore.com

C-025-0004-11
Polyurethane 90 durometer
Foster Check Valve

AS568-004 U90 EU Polyether Urethane 90 Duro O-Ring [U90004] : The O-Ring Store LLC, We make getting O-Rings easy!

The O-Ring Store LLC AS568-004 U90 EU Polyether Urethane 90 Duro O-Ring [U90004] - 5/64"ID X 13/64"OD X 1/16"CS Polyurethane: EU Polyether Urethane General Purpose EU Polyurethane rubber is notable for its combination of hardness with elasticity, outstanding abrasion resistance and tear...

www.theoringstore.com

C-025-0013-11
Polyurethane 90 Durometer
Regulator Piston,
Valve Body

AS568-013 U90 EU Polyether Urethane 90 Duro O-Ring [U90013] : The O-Ring Store LLC, We make getting O-Rings easy!

The O-Ring Store LLC AS568-013 U90 EU Polyether Urethane 90 Duro O-Ring [U90013] - 7/16"ID X 9/16"OD X 1/16"CS Polyurethane: EU Polyether Urethane General Purpose EU Polyurethane rubber is notable for its combination of hardness with elasticity, outstanding abrasion resistance and tear strength...

www.theoringstore.com

C-025-0016-01
Buna 70 Durometer
Chamber Insert

AS568-016 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring [B70016] : The O-Ring Store LLC, We make getting O-Rings easy!

The O-Ring Store LLC AS568-016 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring [B70016] - 5/8"ID X 3/4"OD X 1/16"CS Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known as Buna-N or NBR, is a copolymer of Butadiene and Acrylonitirle. It has a...

www.theoringstore.com

C-025-122-21
Viton 90 Durometer
Front Block, Regulator

AS568-122 V90 FKM/Viton® O-Rings – High Heat & Chemical Resistant Fluorocarbon (FKM) 90 Durometer [V90122] : The O-Ring Store LLC, We make getting O-Rings easy!

The O-Ring Store LLC AS568-122 V90 FKM/Viton® O-Rings – High Heat & Chemical Resistant Fluorocarbon (FKM) 90 Durometer [V90122] - V90 FKM/Viton® O-Rings – High Heat & Chemical Resistant Fluorocarbon (FKM) 90 Durometer Upgrade your sealing performance with our V90 FKM/Viton® O-Rings, designed for...

www.theoringstore.com

C-025-122-21
Polyurethane Durometer 90
Front Block, Regulator
(SAME SIZE AS ABOVE BUT THIS IS ANOTHER OPTION BASED ON @Bladebum RECOMMENDATION) if you are having issues with the Viton 90 Durometer then you might want to try this out.

AS568-122 UC90 Cast Urethane O-Rings 90 Duro Disogrin 9251 TODI [UC90122] : The O-Ring Store LLC, We make getting O-Rings easy!

The O-Ring Store LLC AS568-122 UC90 Cast Urethane O-Rings 90 Duro Disogrin 9251 TODI [UC90122] - UC90 Cast Polyurethane O-Rings – 90 Duro – Disogrin® 9251 TODI by Freudenberg Designed for heavy-duty applications, The O-Ring Store LLC’s UC90 Cast Polyurethane O-Rings are crafted from...

www.theoringstore.com

C-025-0117-00
Buna 70 Durometer
Regulator

AS568-117 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring [B70117] : The O-Ring Store LLC, We make getting O-Rings easy!

The O-Ring Store LLC AS568-117 B70 (NBR) Buna-N Nitrile 70 Duro O-Ring [B70117] - 13/16"ID X 1"OD X 3/32"CS Buna-N O-Rings 70 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known as Buna-N or NBR, is a copolymer of Butadiene and Acrylonitirle. It has a...

www.theoringstore.com

View attachment 2077

EVOL Oring help evol

Oct 2, 2023

I went to toms website and downloaded the oring sheet with all the sizes and figured since it took me a few minutes to search everything out I would post it here.

Will someone that is familiar orings and the sizes please double check and confirm I'm not ordering the wrong stuff?

If everything checks out then others can use the links to quickly make their own oring kits for their evols.

C-026-1070-00
1.5x7mm
70 Buna
Gauge, Foster

1.5mm X 7mm (NBR) Buna-N 70 Duro Metric O-Ring [N1.50X007] : The O-Ring Store LLC, We make getting O-Rings easy!

The O-Ring Store LLC 1.5mm X 7mm (NBR) Buna-N 70 Duro Metric O-Ring [N1.50X007] - Buna-N Nitrile (NBR) Metric O-Rings – 70 Durometer The O-Ring Store LLC provides high-quality Buna-N Nitrile (NBR) Metric O-Rings, engineered for superior sealing performance across industrial, automotive, and...

www.theoringstore.com

C-026-1105-00
1.5x10.5mm
Buna 70
Gauge Spacer...

• Nealgl1985
• Replies: 29
• Forum: American Air Arms

• 
• 

 

[Bladebum]

Dear Tom, I would like to know the sizes of all the O-rings on the regulator and where they can be purchased. Thank you!

Like @pan60 posted above there is a very good thread with all the o ring materials, durometer and sizes. Also, you can download all the pdf schematics on AAA website.

 

[American Air Arms]

https://americanairarms.com/wp-content/uploads/2019/09/E-200-0015-00-RB.pdf