PCP aux tank required valve components?

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WOW

WOW

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Dec 26, 2023
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Alton
Hello,
I am seeking some quick advice on how to utilize this cheap pcp tank I got. I am concerned with using this as a fill tank, not a constant feed air supply. Upon getting it to hold air I realized I am missing the component to allow me to use it as a fill tank. Can someone tell me what those are called? Maybe provide a link? It seems to me that the top half of the block is exchangable for one with a fill valve and handle, or would it require another component in addition to what's here?
The tank is partially pressurized, kinda an oops on my part.
I finally have a chronograph on the way as well as the 110v power adapter for my cheap compressor so I'd like to get this tank into service.

On another note, it seems this one may regulate as 4500 input and 800 output. In relation to filling small airtubes to 2200-3000psi, have I selected the wrong product? Need a whole new valve setup?

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You need a valve on the tank to open & close off flow of air to whatever you're trying to fill from it and then, for maybe refilling that tank. You'll need to depressurize the tank, remove existing "valve" & get the width & thread pitch dimensions of the neck to find a valve that fits. An 800psi outflow isn't worth much for the airgun application too. Someone might chime in about WHERE to find a valve. The male foster fitting on tank probably has a one way check valve & is for recharging it I think.
 
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First off, that is a regulator for a gun with a G1/2-14 fitting on the top.

You need an HPA or PCP fill station


They *usually* are not regulated so when filling a gun from a tank be careful to not overfill if you gun bottle/tube is rated less than what you have in the tank.

There is a regulated fill station on AliExpress if you want to go that direction.
 
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SpindleB said:
First off, that is a regulator for a gun with a G1/2-14 fitting on the top.

You need an HPA or PCP fill station


They *usually* are not regulated so when filling a gun from a tank be careful to not overfill if you gun bottle/tube is rated less than what you have in the tank.

There is a regulated fill station on AliExpress if you want to go that
Click to expand...
I tip my hat to you, sir. I will look into the regulated version because the Crosman 3622 doesn't have a dohickey.
 
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As you choose between a simple valve with which you control the fill and a regulated valve, do know that a regulated valve is going to "waste" more air when the line is vented than a simple valve. This happens because the internal design of the regulated valve, by simple physics, will hold a larger amount of compressed air internally in it as it functions, and that will all be vented to the atmosphere when you vent the line. On a small tank, this can amount to a significant reduction in the amount of fills that you get out of a full tank.

I do have one on a small 500cc bottle I use to fill my Air Arms Alpha target pistol, which I decided I needed as it is hard to control the fill into the very small reservoir in that gun (only 27 ccs). But to have it make sense in terms of refills, I need to use an Edgun Easy fill on the fill line to keep it charged between uses - without the EaZy fill I could only get two fills from the 500cc tank when filled to 3500 psi, filling the small reservoir to 2900 psi. With the EaZy fill I get lots of fills.

Just something to consider . . .
 
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BGarney said:
Please check the max fill pressure on that tank.
Click to expand...
It says 465 bar, which is over 6000psi. The lower valve block says 4500psi. Considering the tank says 465 bar it begs the question: Am I legit able to fill it to 465bar/6000+psi if I procure a valve capable of that? I assume it would require a very powerful compressor which I won't be getting, but it's possible, right?


17382514579431403233005068849156.jpg
 
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AlanMcD said:
As you choose between a simple valve with which you control the fill and a regulated valve, do know that a regulated valve is going to "waste" more air when the line is vented than a simple valve. This happens because the internal design of the regulated valve, by simple physics, will hold a larger amount of compressed air internally in it as it functions, and that will all be vented to the atmosphere when you vent the line. On a small tank, this can amount to a significant reduction in the amount of fills that you get out of a full tank.

I do have one on a small 500cc bottle I use to fill my Air Arms Alpha target pistol, which I decided I needed as it is hard to control the fill into the very small reservoir in that gun (only 27 ccs). But to have it make sense in terms of refills, I need to use an Edgun Easy fill on the fill line to keep it charged between uses - without the EaZy fill I could only get two fills from the 500cc tank when filled to 3500 psi, filling the small reservoir to 2900 psi. With the EaZy fill I get lots of fills.

Just something to consider . . .
Click to expand...
This makes sense and I was kind of aware I won't be getting a lot. I'm kinda wondering about filling to the tank max of 6000psi range, which would account for more filling from the start. Not sure about 6000+psi valves... I'm only aware of 3000 and 4500 tiers.

I do like the safety of the regulated version in general, which is kind of needed in any conditions I may want to take a tank into. Say I overfill thru some fluke then I have an ill-seated foster connection pop. It's avoidable so I'm leaning that way even w a reduction in fills. One of my guns is the Jet and I have a spare airtube for it, so I' ahead of the game by one portable fill in this context.
 
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AlanMcD said:
As you choose between a simple valve with which you control the fill and a regulated valve, do know that a regulated valve is going to "waste" more air when the line is vented than a simple valve. This happens because the internal design of the regulated valve, by simple physics, will hold a larger amount of compressed air internally in it as it functions, and that will all be vented to the atmosphere when you vent the line. On a small tank, this can amount to a significant reduction in the amount of fills that you get out of a full tank.

I do have one on a small 500cc bottle I use to fill my Air Arms Alpha target pistol, which I decided I needed as it is hard to control the fill into the very small reservoir in that gun (only 27 ccs). But to have it make sense in terms of refills, I need to use an Edgun Easy fill on the fill line to keep it charged between uses - without the EaZy fill I could only get two fills from the 500cc tank when filled to 3500 psi, filling the small reservoir to 2900 psi. With the EaZy fill I get lots of fills.

Just something to consider . . .
Click to expand...
I'm onto that EaZy Fill but will be looking for a much cheaper version. It actually seems to be something DIYable. A high pressure check valve with 2 fosters? Seems simple.
 
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WOW said:
I'm onto that EaZy Fill but will be looking for a much cheaper version. It actually seems to be something DIYable. A high pressure check valve with 2 fosters? Seems simple.
Click to expand...
Agree that the EaZy fill is expensive for what it is, but it is robust. I'd love to pick up a few of the knockoffs as they are so much cheaper, but the relaibility reports are poor on them, so take that into account - many have said they did not even work for one use.

As for making your own, the issue is that you need a vent between the two foster fittings with the check valve. Adding that vent on a DIY one unfortunately adds a lot of volume that will be vented (although less than would be vented from the regulated valve). This the closest thing I've found to a what one would be like, and I did consider buying it. https://airtanksplus.com/product/quick-connect_in-line_one-way_check-valve_w_bleed_valve/

1738256327836.png


That venting function is where the EaZy fill (and the knock offs) shine since they are integral and don't add volume . . .
 
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