Filling PCP's and " Dive cylinders"

[unclesparks]

Yes i have a Falcon FN19 walnut thumbhole in .22. Its annoyingly good. Ive wanted to sell it to get a multi shot PCP but its just won a place in my heart. It never lets me down, its perfectly balanced and shoots straight time and time again, and despite numerous trips out in the wet and rain it jsut continues to look like new. Its about 10 years old i guess and ive had it from new. I didnt use it for about 7 years along with all my guns due to the ex wife not liking shooting but now she's gone they're back in full use. Yes i would definatley recommend one, i love the trigger feel, the way it handles, it just needs a good silencer, i have a parker hale on there at the moment but want a weihrauch silencer but the local gun shop doesnt sell anything except parker hale so im stuffed for the moment. If a cheap .22 mult shot one came up with a skeleton thumbhole stock then i would have to have it Ive lusted after a HW100 but im worried i wouldnt like it as mush as the Falcon as its heavier so ive never switched. I still have a a springer HW77k which i used all over the weekend and im trying to get more familier with my Theoben Evo in .20 but its taking time, not a instant hit like the Falcon. Yes i love mine, its bagged more than a few bunnies over the years and i love it. I did add a brass trigger shoe which all my guns have and its a wicked little mod that always makes a little improvement in feel in my opinion. Let me know how you get on. Im using Field Target Trophy pellets at the moment and they seem good, i might try Air Arms doomed ones next or crosmen. If they are better i will let you know.

[gregoir]

Say I bought a gun fitted with a 200bar max. tank.If I have an air bottle filled to 300bar would that be OK for filling the gun? Am I correct in assuming that there must be a pressure control regulator some where?

[steve410]

Yes there is a regulator gauge on your bottle. You can fill to any pressure. 300 hundred bar being the max the bottle can deliver. Almost all PCP guns are filled to around 200 bar.

[ghettostan]

Hi just wondering, when I start to pump my Raider it pumps just under '100bar' and then seems to hardly move any higher do I just keep pumping to 190/200bar? or stop?

I pause at the top and bottom of every stroke and it doesnt seem to loose air.

Maybe its just me? I heard it takes about 3minutes to pump but takes me 40seconds to get to 100 bar. So is it safe to keep pumping to 200 or is there something wrong?

[Clubshot]

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BOB/R

[cr*pshot]

Hi just wondering, when I start to pump my Raider it pumps just under '100bar' and then seems to hardly move any higher do I just keep pumping to 190/200bar? or stop?

I pause at the top and bottom of every stroke and it doesnt seem to loose air.

Maybe its just me? I heard it takes about 3minutes to pump but takes me 40seconds to get to 100 bar. So is it safe to keep pumping to 200 or is there something wrong?

Nothing wrong at all mate - until you reach the pressure in the gun's cylinder (in your case around 100 Bar), you're just pressurising the filler hose, a few cc in volume. When the pressure reaches that in the cylinder the fill valve opens (you should hear a faint "click") - then you're raising the pressure in the cylinder (180 cc or so on the Raider if I remember correctly). Each stroke of the pump delivers the same volume of air but obviously, given the larger volume of the cylinder, it will have less effect on the pressure.

I hope this helps but I'm a printer, not a physicist!!

[stefan]

Nothing wrong at all mate - until you reach the pressure in the gun's cylinder (in your case around 100 Bar), you're just pressurising the filler hose, a few cc in volume. When the pressure reaches that in the cylinder the fill valve opens (you should hear a faint "click") - then you're raising the pressure in the cylinder (180 cc or so on the Raider if I remember correctly). Each stroke of the pump delivers the same volume of air but obviously, given the larger volume of the cylinder, it will have less effect on the pressure.

I hope this helps but I'm a printer, not a physicist!!

yea what he said but im just a fat bloke not a scuba diver

[cr*pshot]

yea what he said but im just a fat bloke not a scuba diver

Don't worry mate, I'm not exactly sylph-like either! Using a pump is more a matter of using your body weight rather than strength - one of the few activities where it's better to be "built for comfort rather than speed".

....and us more "generously proportioned" blokes provide a steadier and more stable shooting platform....

[Tadpole]

I found this an excellent read, although some time ago thanks for posting …………..

[jetski]

Hi mike that is a good write mate and deserves a sticky IMO one thing i would like to know... Do you know anything about CO2 filling ? i ask because ive found some 88gram refillables on the net. i know they have to be weighed as they are liquid CO2. just wanna know if its cost effective as those "use once" can be pretty pricey if you use it a lot.

Cheers

Macka

they don't have to be weighed mate. co2 is self regulating at about
850psi. once the gas gets to 850 psi it turns to liquid and stays at 850psi. once the cylinder is full of liquid that's it, its full and can't have any more put in it as the doner bottle is the same pressure. a very cheap way of re filling with co2 is from a fire extinguisher or pub bottle. getting a fire extinguisher refilled will cost about £5 and loads of companies fill them.

another good thing about co2 is you don't get a power curve like unregulated pneumatics. co2 pressure stays the same after every shot, so its much more consistent.