green gas or top gas?

[21ca mod.]

my friend has a sigma S&W kwc, it has the adapter for CO2 and u can use gas. It says on airsoftatlanta.com that it uses top gas too. Would it be safe to also use green gas.

[Josh Walrus]

[motherly voice]
honey...

top gas and green gas are both HFC22 so, they're the same thing sweetie
[/motherly voice]

[21ca mod.]

yes, i am a noob *hangs head in shame* "thank you mommy!!!!"

[Motown]

I would suggest both of you read the Gas Primer in the Gas Forum (it's stickied)

First, let's go through the basics to be sure that we're all on the same page.
HFC132a, 1,1,1,2 tetrafluoroethane, is also known commonly as "duster gas." Readily available here in the States. Somewhat harder to get in Europe and other overseas countries. Brand-names include Tokyo Marui's "Blue Gas" and Western Arm's "WA GunPower."

Taiwanese "Green Gas," CH2FCF3CH3. Sold only as proprietary airsoft propellant gasses. Brand-names include Toy Jack/Top Gas, HFC, UHC, and Omega. Typically, they are also referred to as "Super Power Green Gas."

HFC22, more correctly referred to as HCFC22 (thanks, Phoenix!), chlorodifuloromethane. Getting true HCFC22 is becoming harder and harder to obtain in the States as this is on the "slow-ban" list due to the fact that it is harmful to the ozone.

Now, to add to the confusion, the following contribution from Rotor – Thanks!

R12 is also known as CFC12, dichlorodifluoromethane. Being a hydrochlorocarbon with high ozone depleting properties, it is currently banned from manufacture in the US and many industrialized countries world-wide. Currently, it is "reclaimed" and re-used. Production in the US stopped as of Jan 1, 1996.

HCFC22, which is chlorodifluoromethane, is, as I’ve mentioned above, on the "slow-ban" list (it's not "as harmful"), scheduled for complete cessation of production by the year 2020.

I’ve yet to see R12 Freon used in airsoft. Perhaps it was before my time….. However, I also have yet to see bottled HCFC22 for airsoft – I simply have not seen this marketed ANYWHERE, aside from true industrial or refrigeration use. The supply that I have is from an old cache of scientific laboratory use coolant which I’ve “jury-rigged” for use….. Anyone? There is a website that sells bulk canisters of HCFC22, but without a proper pressure-regulating adaptor, you’ll run the risk of overpressurizing your fill and (1) destroying your GBB and (2) possible personal harm to yourself!

"Red" and "Black" gasses. Unknown chemical consitutency (I've yet to get a canister of this stuff, or see it in person). Rumored to only be suitable for use in highly upgraded GBB's.

Top Gas and Green Gas according to Dumborat are the same, however, they are most likely not actual HFC22.

[Knief]

Boanerge, neither top gas not green gas are true H(C)FC 22. Top gas and green gas are different names for the same stuff, CH2FCF3CH3. H(C)FC22, on the other hand is chlorodifuloromethane. They're chemically different. HCFC22 is on the slow ban list because it's harmful to the o-zone.

True HFC22 is chlorodifluoromethane, a chemical compound that is distinct from that used in various Taiwanese "Green Gasses." Yet, many mis-informed individuals insist that the two are one and the same. This can be easily dis-proved by a simple chrony and a gas efficiency test. Depending on the particular GBB's valving and mechanicals, you will more than likely find a considerable difference in performance in terms of muzzle velocity and gas efficiency when you substitute HFC22 for Taiwanese "Green Gas," and vice-versa; even with identical fill-times and testing conditions. This only stands to reason if, somehow, the two gasses are indeed NOT the same.

~DumboRAT in his Gas Primer ( miairsoft.proboards2.com/index.cgi?board=gas&action=display&n=1&thread=405 ).

Rats, Motown beat me.

[Josh Walrus]

gotcha kneif, thanks for putting the peices to the pizzle

and they are just about the same in performance, so one wouldnt do more damage to a gun than the other i dont believe, unless some chemical difference makes one more harmful

[Knief]

Actually, HCFC 22 is more acidic than the other gasses used for airsoft. It's really not a problem for us because true HCFC 22 isn't available in the US. Any can that you buy that is claimed to be HFC 22 is really just standard green gas. Because it's on the slow ban list, HCFC 22 is not available to the public anymore. You'd have to be a HVAC technician to get your hands on it now a days.