New to pcp air rifles. This is my first fill of my 9L tank using my new GX CS4. My question is how long does it take before the tank gauge starts to show pressure? Anything or secrets I need to know about this setup?
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New to pcp first 9L tank fill, GX CS4
- Thread starter RallyeX
- Start date
my 74cf from 2000-4500 takes probably an hour so this might just take a while. Make sure you crack the compressor bleed screw every 5 minutes to rid of moisture
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Make sure bleed valve is closed when you are filling too. You can close the bottle a couple times quickly and take a look at the gauges to see if the compressor is building pressure or not.
Allen
Allen
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It is finally starting to show pressure on the gauges. Took about 1.25 hrs. Stopped it for tonight and will finish tomorrow.
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You have a leak somewhere, It should start showing pressure on the compressor gauge in the first 10 minutes. Make sure the bleed valves on the tank and compressor are closed and feel around the hose connection for any leaks. good luck
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I only have a small tank, but it does seem that the first 1000PSI takes the longest to build from empty. I would let it run an hour. You're not going to hurt the compressor. Set a timer. First couple times I filled my bottle I felt there was a problem, but it just took more time than expected to get that initial 1000ish PSI.
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Here are a couple gizmos that I use which make life easy filling. The first is a one way valve which when you use you’ll wonder how you did without. you connect the female end to your large tank you’re going to fill. open the valve on the tank. The check valve won’t allow the air to escape. Once you connect the compressor to the male side and start running it it’ll overcome tank pressure and the valve will open. This protects the compressor from tank pressure. don’t use this on a gun (ask me how I know.)
www.bestfittings.co.uk
Another thing to consider is a desiccant filter. This one I use myself just double up on the burst disc mine kept blowing.
BEST Fittings One Way Valve Quick Coupler Compressor Connector Male-Female – Best Fittings
www.bestfittings.co.uk Another thing to consider is a desiccant filter. This one I use myself just double up on the burst disc mine kept blowing.
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You NEED some kind of moisture filter inline to your tank or moisture will end up in your tank and gun(s) sooner or later.
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I need to remember this when I get a tank.Here are a couple gizmos that I use which make life easy filling. The first is a one way valve which when you use you’ll wonder how you did without. you connect the female end to your large tank you’re going to fill. open the valve on the tank. The check valve won’t allow the air to escape. Once you connect the compressor to the male side and start running it it’ll overcome tank pressure and the valve will open. This protects the compressor from tank pressure. don’t use this on a gun (ask me how I know.)
BEST Fittings One Way Valve Quick Coupler Compressor Connector Male-Female – Best Fittings
Another thing to consider is a desiccant filter. This one I use myself just double up on the burst disc mine kept blowing.
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Big tanks take a looong time when filling from dead empty. Yes you need a good inline filter between compressor and tank. I feed my compressor with super dry instrument air from my dental compressor, zero moisture in my HPA.
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Just filled the very same today, due to a change of tank valve.
First bleed 200 BAR = helluva cold valve and tank
After i had done som other things the tank ( placed upside down with old valve removed ) had returned to a sort of normal 20 deg C and so i put in the new valve and went to my compressor.
Filling for a while i was WTF ????? but the tank was filling alright, just took a little while to get gauge on compressor and tank to show anything
Mind you i am filling from a 4 cylinder 90 L / h compressor, but all in all i think the fill only took 30 - 40 minutes or so, forgot to time it but i have entered 45 min in the compressor log.
First bleed 200 BAR = helluva cold valve and tank
After i had done som other things the tank ( placed upside down with old valve removed ) had returned to a sort of normal 20 deg C and so i put in the new valve and went to my compressor.
Filling for a while i was WTF ????? but the tank was filling alright, just took a little while to get gauge on compressor and tank to show anything
Mind you i am filling from a 4 cylinder 90 L / h compressor, but all in all i think the fill only took 30 - 40 minutes or so, forgot to time it but i have entered 45 min in the compressor log.
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I'm filling my empty 6.8L new tank right now with the CS4, from 0 to 80 bar it took 1hr, it's still going. I was told the 6.8L tank would take almost 3hr, i would assume the 9L tank probably going to take about ~5hr so you could split it in two sessions with cool down break in between.
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It is rather difficult to appreciate just how much air it takes to fill a 9 cubic foot capacity air bottle to 4,500 PSI.
Well, until you are watching that compressor gauge go no where for around the first 20-30 minutes of pumping with a Yong Heng pump or similar.
I like to think about how much air that would be at atmospheric pressure.
Well, until you are watching that compressor gauge go no where for around the first 20-30 minutes of pumping with a Yong Heng pump or similar.
I like to think about how much air that would be at atmospheric pressure.
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It would be interesting to know how much the tank weighed empty then full. Back when I used to scuba dive a lot, you could tell the full tanks from the used ones by picking them up. It’s amazing how much volume they hold, so I’d think filling one of those from empty should take a while. Also, ditto on the desiccant filter, you need extra filtration for sure.
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I have an old and perfect 30 gallon compressor tank. I'm thinkin I can fill it to 100 PSI with my dry clean shop air rather than plumbing to my El Cheapo as it would be simpler. Just charge up the big tank every now and again to feed El Cheapo. I'll set it up temporarily and see what kind of run time that tank will support, I think it will work well and save drilling through walls. 30 gallons at 100 should support 6-8 PSI output for several hours. I already have all the pieces to do so.
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Yes, of course I understand that fully. We shall see how it's does. The volume of the air receiver is finite. However the volume of air is a variable based on the air pressure contained within the air receiver. 102 PSI in the air receiver is 7 atmospheres. Thus we have 20 X 7 or 140 gallons of air at 14.7 PSI. The unknown variable is the volume of atmospheric air the pump compresses. I will likely do the plumbing, my nearby bench could use air as well. Beats stringing the air hose from garage to basement. Greatly enjoying absolutely bone dry clean air.
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That compressor wasn’t designed to fill tanks that big, or nit even a 30min scba tank. Only the bottles affixed on guns. You can argue with me and tell me it’ll be ok but let’s see what happens to that compressor in a short while. My bro in law has one to fill his avenger up and that’s what they were designed for, not big scba tanks
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