Overfilling a regulated PCP. What can happen? Solved.
- Thread starter Arnie
- Start date
Not much if its only a little past full. I received guns filled just past their max assuming it was AoA making sure they didn't leak. Pretty smart thinking if you ask me! Crosman (Benjamin!!! especially should do the same)
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G
Guest
Guest
Well yes, but it would be nice to know the specific unit of psi they over fill. When it is just overfilled “somewhere in the red,” it is a bit hard to know whether there is a small leak. I guess that would be time intensive though to fill to say 3500 exactly for a 3000 psi gun. And I get that too. Either way I agree, it is nice to see what is up when you receive it. I think a lot of manufacturers couldn’t deliver on a no leak though. Luckily AOA tends to have higher quality stuff.
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Are you asking because you accidentally overfilled your gun or are you desperate for more shots at the expense of blowing yourself up?
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You do know these cf bottle on our guns and air tube are pressures test over 10,000psi right? I've seen some dude on YouTube tested his marauder pistol air tube to over 12,000 psi behind protected glass and it did not blow up and the prod tube is so small compare to other guns. Tell me, when did you acquire an compressor to fill your gun to 15,000 psi. Most of our compressor is max at 4500 psi. There is no way you gonna blow up your gun with that pressures.
As for op. One or few times over fill wont do harm. But i wouldn't suggest overfill often or leaving them over fill for long periods of time. If you just over fill you can always degass it
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Probably not. Seems it would take quite a high overfill pressure to do that but why risk it? What shape is the reservoir in internally? Rusted? Unseen manufacturing defect? How would one know until it failed. I often fill to the red zone and don't panic if the needle just gets beyond that point as I imagine most are tested beyond that point. But anything can fail.
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I would just shoot it down as quick as I can as to not to Overly stress the seals that may eventually cause your gun to leak.
Thats why I only fill my guns to 3000psi no matter what any of my rifle or pistol fill rating is and just fill more often.
Thats why I only fill my guns to 3000psi no matter what any of my rifle or pistol fill rating is and just fill more often.
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You cant be that naïve to not know the difference between a tested or burst pressure vs a working pressure. If Billy YouTube continually overfills his Mrod, he is going to have a problem eventually. I personally don't care who overfills a gun. Topics like this just add to my list of people I wont buy a used gun from. I don't know at what pressure the metal of your chosen air vessel starts to stress. What we do know is the pressure we can safely fill it to for probably the life of the gun. Most of us have overfilled our guns. We overfill because our gauges are off. We shouldn't fill our Prods to 4,000psi because we want more shots. Its not fair to the guy you sell that gun to.
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Good point. I want to add, or better yet, ask, what about the gages? There must be a max capacity the gages can take, right? That prod guy on you tube, there’s no way he had the factory gage still in place at that high a pressure.
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Some newer guns have "burst plates" or discs, in the primary pressure system. So that will burst to make sure that no harm is done to the rest of the gun.
Not sure about the rest. Seem like reasonable info above.
Mike
Not sure about the rest. Seem like reasonable info above.
Mike
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I have seen the piston retaining ring groove blow out on a popular brand of regulator. Note how thin the metal is in that area of the reg body.
Many regulated guns give less consistent results above 3000 psi even when rated for much higher fill pressures.
It is a fact that it is difficult to design a small thin piece of sheet metal (called a burst disc) that can reliably fail between two specified pressures, say 3K and 4500K, and withstand the fatigue of repeated fills while flexing against what is often not well prepared surfaces.
It is not uncommon for the crap mini gauges on pcps to fail with an indicator needle stuck on a safe pressure. Even the big gauges can go bad or drift off calibration. As a tuner I have two on my fill yoke so I can constantly monitor that situation.
I think it was Tim McMurry that said "eventually all the air in your fill tank will end up in your gun".
Many regulated guns give less consistent results above 3000 psi even when rated for much higher fill pressures.
It is a fact that it is difficult to design a small thin piece of sheet metal (called a burst disc) that can reliably fail between two specified pressures, say 3K and 4500K, and withstand the fatigue of repeated fills while flexing against what is often not well prepared surfaces.
It is not uncommon for the crap mini gauges on pcps to fail with an indicator needle stuck on a safe pressure. Even the big gauges can go bad or drift off calibration. As a tuner I have two on my fill yoke so I can constantly monitor that situation.
I think it was Tim McMurry that said "eventually all the air in your fill tank will end up in your gun".
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I had a Disco I overfilled past 4000psi when I first got a scba tank and was unfamiliar with the valve.
The gun worked fine but it developed a slow leak. I never bothered fixing it because I upgraded to a Marauder.
The gun worked fine but it developed a slow leak. I never bothered fixing it because I upgraded to a Marauder.
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SHOULDNT MATTER TO MOST AIRGUNNERS ANYWAY WHO FILL TO PAST 3000PSI. THEY ARENT LOOKING FOR 1/2" GROUPS OR BETTER AT 100 YARDS OR 1/4" GROUPS OR BETTER AT 50 YARDS ANYWAY. TO THEM MORE SHOTS ARE MORE IMPORTANT. IM AN ACCURACY NUT SO IM GOING TO BE SURE THE GUNS ARE PERFECT EVEN SOME HAVE TO START UNDER 3000PSI FILL PRESSURE TO GET THE ONE HOLE GROUPS AT 100 YARDS.
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Then how come people like Matt from AirArmsHuntingSA and Ted from Tedsholdover can get those groups when they fill their guns over 3000 psi?
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G
Guest
Guest
I once over filled my air rifle by 10 bar but it settles down after the temperature decreases.
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In a high quality world -
(where the lawyers are lined up both side of the road and just waiting for you to pass through in between)
- the materials are usually designed - and - tested @ minimum x2 to x4 above they're guaranteed limits.
Now, this does not mean you shall go back and test they're claim, but overdoing accidentally for 10% or 20% shall still keep you on the safe side.
(where the lawyers are lined up both side of the road and just waiting for you to pass through in between)
- the materials are usually designed - and - tested @ minimum x2 to x4 above they're guaranteed limits.
Now, this does not mean you shall go back and test they're claim, but overdoing accidentally for 10% or 20% shall still keep you on the safe side.
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As long as the cylinder is safe, there is no problem.By the way, if the regulator can not filling high pressure, it is meaningless regulator.
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