Help with Ebay CF Tank Purchase

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AirgunBill

Member
Nov 2, 2015
1,271
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Maryland, United States
I have a Great White tank that I used to carry with me when I traveled afield to target shoot and hunt to have air on hand. Now that I have a home range to shoot at I would like to keep the heavier Great White at home and get a smaller bottle to take afield. I was looking at this bottle that is .5 liter which I believe is about 18 cubic ft. and would give me about 6 to 8 fills depending on my rifle used. What I wanted to clarify was this bottle comes with a 'regulator' Is this really nothing more than a fill valve to open and close, a bleed valve and male foster underneath the yellow plastic caps as pictured. If so it would fit my needs at about the half the cost of other small bottles you see for sale here. Bill

https://www.ebay.com/itm/New-pcp-air-gun-500cc-4500psi-300bar-carbon-fiber-cylinder-with-regulator/173127055376?_trkparms=pageci%3A63a50966-1a86-11e8-90c6-74dbd180c2ca%7Cparentrq%3Acf5e36071610a9c56c27171bfffe58ae%7Ciid%3A1&_trksid=p2481888.c100675.m4236
 
"AirgunBill"I have a Great White tank that I used to carry with me when I traveled afield to target shoot and hunt to have air on hand. Now that I have a home range to shoot at I would like to keep the heavier Great White at home and get a smaller bottle to take afield. I was looking at this bottle that is .5 liter which I believe is about 18 cubic ft. and would give me about 6 to 8 fills depending on my rifle used. What I wanted to clarify was this bottle comes with a 'regulator' Is this really nothing more than a fill valve to open and close, a bleed valve and male foster underneath the yellow plastic caps as pictured. If so it would fit my needs at about the half the cost of other small bottles you see for sale here. Bill
https://www.ebay.com/itm/New-pcp-air-gun-500cc-4500psi-300bar-carbon-fiber-cylinder-with-regulator/173127055376?_trkparms=pageci%3A63a50966-1a86-11e8-90c6-74dbd180c2ca%7Cparentrq%3Acf5e36071610a9c56c27171bfffe58ae%7Ciid%3A1&_trksid=p2481888.c100675.m4236
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500cc at 4500psi is about 5.5CF not 18CF
 
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"Oregun"AG Bill,
I'd stick with a US company... check-out JDS Air Man
http://jdsairman.com/homepage.html
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Oregun I actually have one of JDS's steel tanks on my TalonSS with a Altaros regulator. The problem with most of JDS tanks they are steel and only rated to 3000 psi. They do have one cf tank rated to 4500 psi but the highest output is regulated to 3000 psi, my FX rifles fill to 220 to 230 bar which is approximately 3190 to 3335 psi. I would want the ability to fill to what level I want. Now the problem with comparing the capacity of all these tank sizes is there are tanks sized in liters, cubic feet, cubic inches and I think cubic centimeters not to mention 30, 45 and 60 minute scba tanks. The other problem is I am not sure that calculating regular volume is the same as the volume of compressed air. I would like to have the capacity of a tank like Joe B's Guppy which is 18 cubic feet or 118 cubic inches as stated on his website. I sort of thought I had this volume conversion figured out but now I am not so sure. As far as fills using the Guppy tank and my FX Streamline and Pyramid Airs fill calculator filling my Streamline 190cc tank to 220 bar or 3190psi and shooting down to 125 bar or 1812 psi I should get 8 total fills off the Guppy tank. My FX Streamline gets about 60 shots per fill so that times 8 means about 480 shots from a Guppy size 18 cu ft or 118 cu in. tank. Now if I could only convert these liter and other size tanks to cubic feet I could calculate the size for a tank to take to the field. Bill
 
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BigTinBoat you seems to have a better grasp on these tank volumes comparisons. The Ebay add tank size I attached above was not as the first one I looked at stating the size of the tank at 0.5 liters. Is this the same volume as 500cc. I was really looking for a tank size equivalent to the Guppy's 18 cubic feet. This would give me a decent capacity for a day afield. Would you be able to tell me the the Guppy's equivalent in liters or cc. Is cc cubic centimeter and not cubic inches too. Also do you think the above valve is probably a regulated valve for paintball output not pcp's. If so then I could just but the tank alone and get a proper pcp fill set-up. Better Ebay listing below of the tank I originally looked at. Thanks Bill

https://www.ebay.com/itm/New-0-5L-air-tank-300bar-4500psi-carbon-fiber-balloon-cylinder-with-regulator/173144114387?_trkparms=aid%3D444000%26algo%3DSOI.DEFAULT%26ao%3D1%26asc%3D50073%26meid%3D8eb8edd629b34311a651b1d7253e76cd%26pid%3D100752%26rk%3D5%26rkt%3D6%26sd%3D173127055376%26itm%3D173144114387&_trksid=p2047675.c100752.m1982
 
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"BigTinBoat"The JB guppy tank is about the equivalent of a 90cuin paintball tank or a 1.5l (1500cc) tank - at 4500psi each of these holds about 16.2CF of air.
Here is a decent guppy size tank
https://www.airhog.com/tank-sets/178-14-cuft-small-tank-set.html
Or Benjamin also makes a 90cuin that you can sometimes find for about $275 with a fill hose.
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If 500cc is the equivalent of .5 liter it looks like I was looking for about a 3 liter tank. The complete 3 liter cf tank set-up I saw on AliExpress was $326. The Guppy is listed as 18 cubic feet or 118 cubic inches. that makes it about 22% bigger than the Airhog. I thought at first I might be seeing a great deal ordering the tank from China but I can but the Guppy for $389 from JB and get a quality tank and fill set-up. Thanks for your help BTB.
 
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"BigTinBoat"You can get the Benjamin tank from Crosman right now for $292.49 if you use the AGNATION code on Friday. It is $429.99 - 107.50 (25%) making total $322.49 and then they have a $30 mail in rebate. Do on Friday to get the Freeshipping.
https://www.crosman.com/pcp-charging-system-15
** edit to put the correct link
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That is a pretty good deal to consider Thanks Again
 
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"Eaglebeak"A 3 litre tank with 300 bar should be perfect for what you want. I think a Marauder cylinder is about 190 cc so if you compare that with .5 litres, the paintball tank is only just over twice the capacity of that of the Marauder. I hope that gives you some kind of perspective. We spell litres like this in Australia
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MRod tube is 215cc
That .5l tank is a bit over twice the volume, but 3 times the "capacity", since it has the 4500psi fill compared to only 3000psi for the MRod tube. Even such it would be way to small to bother carrying as a "Fill source".
 
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Yes, that is a good deal, but you can't buy the Benjy tank with the "free" 30 day trial... Been there, tried that, doesn't work. Not saying the regular non-member price isn't bad ($299) and with the $30 rebate it works out to $269. But you can't get the actual Sportsman's Guide price of $269 unless you pay the membership fee which is $30 (I think).
 
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