I have always used nitrogen in my PCP rifles. My question , do I need to empty the nitrogen from the rifle before I use compressed air? What will happen if I do not? A friend wants to borrow my Streamline for few months & only has a pump. Thanks
Nitrogen/Compressed Air
- Thread starter Nutcracker
- Start date
Nothing, air as we breath it is Iike 70% nitrogen. Be more concern about the quality of air your friend uses -water.
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Thanks for the prompt reply. I kind of thought it would not be a problem, But heard not to mix nitrogen & compressed air in tires. So just wanted to be sure. He will be using a Hill pump, think it has some kind of filter.
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My SL is coming up on a year of ownership/shooting. I hand pumped that for four months. I bought an oring kit for it as I thought it might be a good idea to do an annual tune-up....winter will be very busy for me on the farms.
Sure would be interested in seeing what the inside of the air cylinder looks like.
Sure would be interested in seeing what the inside of the air cylinder looks like.
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Go to a quick lube with a tire filled with nitrogen but low on pressure. They'll tell you to go to a dealership to get it topped off because they can't mix air with nitrogen.
That's what happened to me a couple of months ago when I took my daughter's car in for an oil and filter change.
I'm not saying they're right, I'm just saying that the information is out there.
That's what happened to me a couple of months ago when I took my daughter's car in for an oil and filter change.
I'm not saying they're right, I'm just saying that the information is out there.
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"But heard not to mix nitrogen & compressed air in tires..." - Seriously??
That is what I heard a few years back when people started using nitrogen in their tires. But it may have just been a bunch of BS. I just used that Hill pump to pump up the Streamline. First time I ever pumped one up, about wore me out. Thanks for all the replies.
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Only reason they say that is because nitrogen loses pressure in tyres slower than normal air due to the lack of the smaller molecules that migrate/diffuse through the rubber. So if you start mixing them, you lose most of that advantage and may as well just be using normal air.
Not an issue in pcps due to the orings being less porous than tyre rubber.
Not an issue in pcps due to the orings being less porous than tyre rubber.
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I've been mixing nitrogen and air from a hand pump for a few months now without any problems. Used it in my FX Impacts, Boss, Airforce Condor, Edgun Leshyis and Weihrauch HW100.
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Guys come one, can you read?
You are not mixing anything - Air is a gas and major component of that gas is a Nitrogen almost 80%
All tires and airguns designed to run on an AIR which is again 80% Nitrogen
It's one of the biggest scams ever created by car dealers
They are selling you snow in the middle of winter. "Snake Oil" dealers at least sell some oil...
It may have some advantage for 200mph race cars when tire temperature exceeds a couple hundred degrees
For regular cars it has ZERO effect, Ok not absolute zero, but let's say your car tires will leak Nitrogen 2% slower than air
Nitrogen filled tire will have 36psi after a year of use and the air-filled tire will be 35.9psi - would you ever notice that ????
You are not mixing anything - Air is a gas and major component of that gas is a Nitrogen almost 80%
All tires and airguns designed to run on an AIR which is again 80% Nitrogen
It's one of the biggest scams ever created by car dealers
They are selling you snow in the middle of winter. "Snake Oil" dealers at least sell some oil...
It may have some advantage for 200mph race cars when tire temperature exceeds a couple hundred degrees
For regular cars it has ZERO effect, Ok not absolute zero, but let's say your car tires will leak Nitrogen 2% slower than air
Nitrogen filled tire will have 36psi after a year of use and the air-filled tire will be 35.9psi - would you ever notice that ????
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The advantage in using nitrogen is when you have rapid temperature changes, as in jet aircraft. After flying in 30-40 degrees below zero, if the tire was filled with air, it would loose too much pressure from cold temp contraction. The real problem comes when descending from altitude over a very short time period and air would not have enough time to warm up enough to return to pre takeoff pressures. Making a landing on under pressurized tires would not be good. Nitrogen does not suffer from expansion/contraction to the same degree as air so is able to maintain pressure better with extreme and sometimes rapid temperature changes. Since air is 70+ % nitrogen it must be the oxygen that is responsible for the larger expansion/contraction range. As the first reply stated, I would make sure the pump used had an air-line dryer between the pump and PCP.
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http://www.science.uwaterloo.ca/~cchieh/cact/c120/idealgas.html
PV = nRT
P = nRT/P
How does a air a mixture of gases of most which, 78% ,is nitrogen differ from pure nitrogen? It doesn't! Air would differ from N if any of the component gasses made a phase change in the range of temperatures in question.
https://www.grc.nasa.gov/www/k-12/airplane/airprop.html
I real life most of us use air that isn't free from water and the water in the air does change vapor pressure with temperature. I think this is why most people state N is more temperature stable than air. That is because most air isn't free of water, but a tank of nitrogen is essentially water free.
https://en.wikipedia.org/wiki/Vapour_pressure_of_water
PV = nRT
P = nRT/P
How does a air a mixture of gases of most which, 78% ,is nitrogen differ from pure nitrogen? It doesn't! Air would differ from N if any of the component gasses made a phase change in the range of temperatures in question.
https://www.grc.nasa.gov/www/k-12/airplane/airprop.html
I real life most of us use air that isn't free from water and the water in the air does change vapor pressure with temperature. I think this is why most people state N is more temperature stable than air. That is because most air isn't free of water, but a tank of nitrogen is essentially water free.
https://en.wikipedia.org/wiki/Vapour_pressure_of_water
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OK so noob question here, is compressed nitrogen absolutely fine to run in any PCP rifle then, or does your pcp have to be built for it? I just got a Hatsan Flash, and if I can run compressed nitrogen in it, I might be able to have it filled at work for free. I understand that pure nitrogen and air are very very similar, but in a highly engineered device like an airgun, I just want to be sure I'm not gonna muff my gun up.
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free nitrogen , go ahead, don't be scared, use it, no worries mateit will not MUFF up your gun
just fill slowly, as you would normally do from any tank
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