Pressure question

[LJT]

I was thinking of buying a regulator for my mag so I looked in the manual to check what kind of pressure the gun needed. It says on one of the diagrams that the input pressure should be between 800-1000 psi and the A.I.R. reg brings it down to 375. I just wondered if it was possible to have and input pressure lower than 800 psi, I was thinking 600. If anyone has any clue it would be a great help to this new mag owner.

P.S. Any suggestions for regs would also be good.

[Predater]

i wouldnt. this will probably cause velocity drop in heavy fire. i run my mag at 750 psi compressed and i run my rt at 800psi compressed. do you run hpa or co2? if hpa the reg that comes with the tank is fine but if you have co2 i alwayse liked air america.

[LJT]

I run hpa but it is a pmi and the consistency is not great. I thought another reg would also be good so that the A.I.R. wouldn't have to go from 850 psi to 375 psi. I have read that with that big of a jump it is best to do it in steps, like 850 to 600 to 375 or something similar.

[Predater]

get a reg and set it at 750 or 800, that will help with consistancy and keep a high enough presure so you wont suffer from shoot down.

[xmetal2001]

There is no need for a reg, you already have a double regulated system, your mag and you nitro tank. tripleregulating might starve the gun of air.

Or if you have co2 i would say expansion chamber.

[Predater]

xmetal2001,

if you read all of the posts then you would realize the third reg would be to help with the fluctuating presure of his pre set regulater.

[PhantomX]

Hold it! What kind of Valve are we talkin about first? Can't really answer this one without knowing that first now can we?

A ReTro should have a second reg to adjust the output preasure from the tank to the marker. Thus...the recomended 700-800psi input for the ReTro valve. A fixed tank won't allow this to be changed. The trigger preasure you got is the trigger preasure you got...no changes without a reg!

[LJT]

I am using the stock Minimag valve and a PMI nitro tank. I have worked out most of the fluctuations from the tank but I still don't like the idea of the A.I.R. having to take the pressure from 850 to 375. Wether you believe me or not that is harder on the springs than 600 to 375. The longer I can keep my mag operating the better, plus another reg would make my gun look better.

[Predater]

LJT
if you like what they look like then buy one. it wont hurt any thing. but if you have the presure set at 600 it will probably starve your valve.

also, who cares about 800 psi being harder on the springs than 600. the springs in my gun have ben working fine on 800 psi for over 5 years. i think i can aford to replace the springs after that long.

[Butterfingers]

The mag valve is rated for 3000 psi the springs won't wear out trust me.

Also check your paint to barrel match. That is one of THE most important factors for consistency.

[hitech]

Here is another reason you don't want three regulators. This is quoted from Palmers Pursuit Shop:

Through any regulator there is a certain amount of inverse pressure variation in the output pressure that results from the variation in supply pressure. (as the supply pressure to the regulator goes up or down, the output pressure will go up or down, exactly opposite, and in a ratio that is proportional to the valve and diaphragm (or plunger) dimensions. (i.e. as the supply pressure goes down, the regulated pressure will go up slightly and vice-versa)...It should also be noted that the ONLY way to avoid the variables in pressure is to use two-stage regulation. This in effect, is 2 regulators in series, where the second regulator will reverse the inversion from the first one. It is actually the inherent use of 2-stage reg. that provides the consistency that is so highly proclaimed about the use of High Pressure Air or N2. (one regulator at the tank and the second stage at the gun. The AMag has the 2nd stage built into the gun, not the case with a "cocker.)

[LJT]

There is one other thing I realize now after reading the post from PhantomX: If I want to eventually "Go Retro!" I'll need another reg to lower the output pressure from my tank. I would also like to point out that, unless I misunderstand the opertation of a regulator, the only way to starve the A.I.R. is to lower the input pressure below 375psi(output pressure). I have already tested this with my nitro tank. I used up most of the air after a day of playing and just shot the rest at my house. It was not until the tank reg showed 400-450 psi that the gun started to have problems. I'm not worried about flow rate either. The two regs I am looking at are supposed to have the highest flow rates.

[Paintchucker]

I have been told that you typically want 100-200 more psi going into the AGD valve than it takes to operate. However, I don't like the Reactiveness of my RT Pro trigger, so I typically set my output pressure from my NitroDuck tank to about 550-600, and it works just fine...

[PhantomX]

Hitech is right but if you already have a fixed output tank there is little else you can do to get it adjustable except by putting another regulator on it. The problems caused could be a little or allot! You won't be able to tell until you get the new reg on the tank and try it out. Also, Regs are kinda pricey and bulky.

If money isn't an issue get an adjustable output tank like the Flatline,NitroDuck,Air America and your worries are over. You are now ReTro ready without all the whoohaa.

[razamatraz]

Even RTs run fine off of 800 psi, but 850 output sounds a little high on a PMI tank. MAgs are designed to take 800, they work best from 600 to 800, and the AIR is meant for that. That's why they recharge so fast. Do not take it below 600. I might consider an adjustable tank or a try out a different preset, but do not triple regulate. Your receharge will drop off and you will get bad shootdown, even with a good reg.