Altaros compressor booster mini review

[n2omike]

Altaros has a video on YouTube where they are filling a 7L tank from 200 to 300 bar. Can anyone tell me what size tank that is in cubic feet? I've searched and have come up empty. Thanks.

1 cubic ft = 28.3 liters
1 cubic ft = 1728 cubic inches

7 liters = ______ cubic ft.
7/28.3 = 0.247 cubic feet, or 427 cubic inches

1 Bar = 100 kPa
1atm = 101.3 kPa
1 atm = 14.7 psi

200 Bar x 100 kPa / 101.3 kPa x 14.7 = 2902 psi
300 Bar x 100 kPa / 101.3 kPa x 14.7 = 4353 psi

[Scubajeeper]

Thanks for the reply but I was wondering what the water capacity was. What I'm trying to figure out is, what scba is it closest to it in capacity.

[drewciferpike]

7l is about 1.85gal

Thanks for the reply but I was wondering what the water capacity was. What I'm trying to figure out is, what scba is it closest to it in capacity.

[n2omike]

Thanks for the reply but I was wondering what the water capacity was. What I'm trying to figure out is, what scba is it closest to it in capacity.

This is from the www.airtanksforsale.com website.  It's their Tiger Shark tank.  410 cubic inches, listed as 71 cubic feet.

In the middle is our U.S.A. Made 71 Cu Ft (410 Cu In) Tiger Shark Deluxe.  This tank will fill a Marauder from 2000 PSI back up to 3000 PSI about 47 times. 9 Lbs, & Measure under 19" long by 6.5" diameter (sans valve). (See detailed information further below)

IF it's a direct relationship...

410 cubic in = 71 cubic ft
427 cubic in = ?

Cubic ft = (427/410) x 71 = 74 cubic feet

[rsterne]

That is correct, the water volume of a 7 Litre tank is indeed 427 CI.... The common 88 CF SCBA tank has a water volume of 550 CI which is 9 Litres.... The relationship between pressure and volume describe by Boyle's Law break down above 3000 psi.... tanks hold less air at 4500 psi than you would think....

4500 psi is 310 bar.... Using Boyle's Law the 550 CF tank should hold 310 x 550 / 1728 = 98.6 CF.... but in reality it only holds 88 CF.... The 7 L tank, which is 427 CI, would hold 68 CF at 4500 psi....

Bob

[Scubajeeper]

Thanks for the explanation Bob, that's what I was looking for.

[n2omike]

That is correct, the water volume of a 7 Litre tank is indeed 427 CI.... The common 88 CF SCBA tank has a water volume of 550 CI which is 9 Litres.... The relationship between pressure and volume describe by Boyle's Law break down above 3000 psi.... tanks hold less air at 4500 psi than you would think....

4500 psi is 310 bar.... Using Boyle's Law the 550 CF tank should hold 310 x 550 / 1728 = 98.6 CF.... but in reality it only holds 88 CF.... The 7 L tank, which is 427 CI, would hold 68 CF at 4500 psi....

Bob

So, I guess Joe B is using the 'standard' way of rating and comparing these tanks...  and you're simply pointing out the flaws in this set standard. 

I understand why you state it's less than expected, as Boyle's Law works best at more 'normal' pressures and temperatures... 
It just needs pointed out that the person with the original question about capacity was just looking for a means of comparing the 7 liter (427 cubic inch) tank in the video, to what's out there...  so it would be most 'comparable' to a tank rated at 74 cubic feet, as advertised.

But thanks for the Boyle's Law clarification.  That's a SIGNIFICANT difference in real life capacity! 
Nice to know! 

[straightshooter]

My multipurpose air compressor setup and future Altaros Booster fill station. The final parts came in today and it is complete, just need the Altaros.

Sorry for the crappy pictures.

Edited for info that should have been in original:

Makita 6.5 CFM at 90 PSI Compressor:


Filters Used:

ARO:


SMC:


Xtremepower:


Motor Guard:


Wilkerson:
https://www.grainger.com/product/WILKERSON-Desiccant-Air-Dryer-5Z611

[drewciferpike]

For those of us that will be in the market, soon, and who would like to compare the myriad different setups, can you quickly list what everything is?

My multipurpose air compressor setup and future Altaros Booster fill station. The final parts came in today and it is complete, just need the Altaros.

Sorry for the crappy pictures.

[Scubajeeper]

After doing all that, I'll bet it's killing you to wait!

[straightshooter]

For those of us that will be in the market, soon, and who would like to compare the myriad different setups, can you quickly list what everything is?

My bad, fixed.

[straightshooter]

After doing all that, I'll bet it's killing you to wait!

I was waiting for a Rifle that was ordered months ago, it was delivered today, but Winter starts tomorrow with a forecast of snow. I may wait until spring to order the Altaros, I do not want to order it now and not be able to use it. 

[Old Corps]

After doing all that, I'll bet it's killing you to wait!

I was waiting for a Rifle that was ordered months ago, it was delivered today, but Winter starts tomorrow with a forecast of snow. I may wait until spring to order the Altaros, I do not want to order it now and not be able to use it.

Yeah, I think you guys in the NW part of the state are supposed to get dumped on tomorrow. It was 70 degrees here today and sunny (N. of Flint). We're supposed to get an inch or so tomorrow. YUK!!! Didn't we just get summer?

Ed

[KnifeMaker]

Straight Shooter, I think I would possibly re-think the first filter you have listed. It is rated at only , what was it, 49 cfm?, This will drastically cut down on airflow and really slow an Altaros down. This is below the recommended minimum for the unit. (As it would not give the free flow of the 90 psi rating at flow rate).

Remember, the Altaros needs VOLUME even more than pressure to do it's job. It has to be a balancing act. LOL!!!

As to waiting, I watched as the Shoe Box and Omega went up drastically not long after introduction. Withe the Altaros selling for  525. usd before shipping, with its capabilities, I have no doubt it too will go up in short order.

And if one of our typical Stateside Dealers gets ahold of it, much less with exclusive distributor ship, Katie Bar the Door!

Yes, I put myself out there as a Guinea Pig, but I did do a bit of research before plunking down cold hard cash. And must say, that I am very happy I did!

I too, use the same Desiccant filter. (Still sorry I bought it, not knowing it was the only one they had). Rather than using the supplied desiccant beads, I ordered the higher quality, non acidic beads, (Asme as used in the Altaros filter) for it. they are orange, and turn green when needing treating. Don't know what color of green, as none have turned yet.

Harbor freight has a fairly decent Water separator and Oil separator/ Desiccant filter side by side combo for 60+ bucks, which can benefit from  their usual 20% discount. (Yea).

Been using one for years now. It is one of three Oil separators I have been using on the shoe box for well over 5 years. May be a little more.

And finally, I age my words and ordered the Hi-side Filter from Dman this week. He is building it this week, and shipping Sat. Still don't know if it is needed with the Altaros, as it compresses at such a low temp. But then again, Can't be too safe!    

I will post my finding of build quality, fit and finish, and how she does in the wild!

The reason I use the Altaros so much is My Air Gun is a 200 FPE Mid Bore, that gets shot almost every day. My wife and I are both disabled, and when not going to Doctors or Hospitals for treatment or test, I pass the time shooting and Testing-Testing-Testing.  Bullets, Mixes, AG tunes, Optics. I actually test for several Air Gun and accessory companies. As they know I do use the equipment. And use it HARD!

I have three items either here or coming  the next few weeks for testing the next few months. Ranging from compressor- filters-new valve designs for Big Bores, LDC's, Bullets and Molds. So it is going to be an interesting next few months. 

There are others here that do a lot of testing as well. Particularly, Cedric (Tofazfou), Rifle50, and no doubt others. I really don't know why I have never mentioned it before. Just seem not worth mentioning, other than it comes to bare on this conversation  possibly. Or at least hopefully.

Even though it is a Medical Retirement, I have no difficulty finding ways to pass the time. Between Shooting, and Casting for friends and Members here and over on the tag, I stay happily busy!

Knife

[straightshooter]

Straight Shooter, I think I would possibly re-think the first filter you have listed. It is rated at only , what was it, 49 cfm?, This will drastically cut down on airflow and really slow an Altaros down. This is below the recommended minimum for the unit. (As it would not give the free flow of the 90 psi rating at flow rate).

Here is the specs on the Motor Guard:

Pipe Size is 1/4 NPT, Nominal Airflow is 20 CFM, Filtration Rating is 5 Micron, Maximum Pressure is 125 PSI

So I guess I need to re engineer my filter setup.

Remember, the Altaros needs VOLUME even more than pressure to do it's job. It has to be a balancing act. LOL!!!

I was unsure if it made a difference but I used all V connectors, I will experiment with using the air keg and possibly running the compressor at 100% duty cycle.

ordered the Hi-side Filter from Dman

Knife could you post a link for more info on this filter? Look forward to your review, thanks.

That's really cool being able to test new products, sounds fun.

[KnifeMaker]

No link for the filter per-say, Go to the talon Air gun form, or TAG, and search Dman. He is a regular member there, and has been for years.  We've been into Big Bores there for years. LOL!!!

"D" is manufacturing the filters himself. Every thing I have gotten from him is first rate! With exceptional prices.

Yes, the testing is indeed a lot of fun, and gratifying to help bring new products to market.  Especially when you can troubleshoot a concept, and at times make suggestions that make the product better.
Knife

[Scubajeeper]

Well, I finally decided to pull the trigger on the Altaros, it seems that sales have been so good that they are out right now. Parts have been manufactured and sent out for coating. They will email me when they are ready. I just hope they don't push it and end up with sloppy manufacturing like some gun companies we know of!

[zoominx55]

Compressor question for the Altaros Booster:

On the Altaros Performance page: http://www.altaros.cz/en/other-accessories/48-altaros-compressor-booster-unit#demoTab4  they list 3 compressors and their specs.  This in the one on the bottom of the page:

Driving compressor:   Scheppach HC 24
Input power 1,5 kW / 2 HP
1 cylinder
Max pressure 8 bar (116 psi)
Air intake 220 l/min (7.7 cfm)
Realistically measured amount of airflow 125l/min (4.4 cfm)
Load 100% 4,5l/min (0.158 cfm)
Load 65%   2,7l/min (0.095 cfm

My question is, when looking at a compressor to purchase which of these numbers do I compare to the number usually mentioned when looking at specs.  One I am considering is the Husky 30 Gal 155 psi '5.3 SCFM @ 90 psi', 1.6 HP.

I know bigger is better, but I have space and noise constraints to consider unfortunately. Just wanting to get an idea of how the Husky compares to the lowest on the Altaros list.

I got the same 'out of stock' message from Altaros this morning.

Thanks.

[KnifeMaker]

Yes, the husky will work, "IF the cfm rating is allowing  the compressor to run no more than 60% of the time, and off 40 % of ofthe time.

Knife

[zoominx55]

Thanks Knife.