Author Topic: Co2 Bulk fill problem, Mac1 adaptor  (Read 2855 times)

Rob112o

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Co2 Bulk fill problem, Mac1 adaptor
« on: February 19, 2016, 09:49:25 AM »
I just recently am getting into the bulk fill game. Taking baby steps, but getting there...maybe. I have a QB78D and I recently got the Mac1 co2 bulk fill adapter. Now when I'm filling up co2 is coming out that little hole on the opposite side of the 1/8 inlet. Is this normal or is something wrong with my fill adaptor? I tried writing Tim, but no response yet so getting a little impatient.
    1st mage shows the adaptor on the QB with fittings on it. Just got 1/8 fosters so will be switching them in for the 1/4 in the image. 2nd image shows the parts used from local Home Depot to connect everything.
« Last Edit: February 19, 2016, 02:02:12 PM by Rob112o »



rsterne

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Re: Co2 Bulk fill problem
« Reply #1 on: February 19, 2016, 11:07:28 AM »
Do NOT use those 1/4" Quick Detach fitting from Home Depot on CO2....
They are designed for shop air at about 150 psi, not 850 psi CO2....


Bob
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Rob112o

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Re: Co2 Bulk fill problem
« Reply #2 on: February 19, 2016, 11:21:48 AM »
I ended up getting these 1/4 fittings:
https://m.grainger.com/mobile/product/PARKER-Coupler-Body-30N262

https://m.grainger.com/mobile/product/PARKER-Coupler-Plug-30N227

I thought when in the filling process it's in a liquid state so no problem? It gets some co2 to the tube. I just stop filling since its leaking from that hole.

rsterne

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Re: Co2 Bulk fill problem
« Reply #3 on: February 19, 2016, 12:18:05 PM »
Did you notice that those fittings are rated at 300 psi ?

DO NOT USE THEM ON CO2, THE PRESSURE IS 850 PSI AT ROOM TEMPERATURE....
AND OVER 1200 PSI AT 90 DEGREES F....




Bob
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Rob112o

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Re: Co2 Bulk fill problem
« Reply #4 on: February 19, 2016, 01:10:13 PM »
Thanks for the graph. Yea I noticed the psi. I just thought since it was just supplying from one device to the other I would be good. Since it wasn't going to be under constant pressure. I ordered parts from tippman:
https://www.tippmannparts.com/Quick-Disconnect-Male-Ninja-Black-p/2604.htm
https://www.tippmannparts.com/Ninja-Quick-Disconnect-Female-Ninja-Black-p/2547.htm
Thanks for the heads up Bob!!

Rob112o

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Re: Co2 Bulk fill problem
« Reply #5 on: February 19, 2016, 02:01:50 PM »
So anything about why the adaptor on Mac1's port flows co2 out while I'm filling?

rsterne

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Re: Co2 Bulk fill problem, Mac1 adaptor
« Reply #6 on: February 19, 2016, 02:42:33 PM »
Sorry, don't know.... likely it's a vent, and you have an O-ring issue....

The pressure will come up to full pressure for the temperature you are at as soon as your gun is full....

Bob
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Rob112o

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Re: Co2 Bulk fill problem, Mac1 adaptor
« Reply #7 on: February 19, 2016, 05:00:37 PM »
So you are saying I may have a faulty Co2 bulk fill adaptor?

rsterne

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Re: Co2 Bulk fill problem, Mac1 adaptor
« Reply #8 on: February 19, 2016, 05:48:23 PM »
It depends on what is leaking, the O-ring inside the adapter, or the O-ring on the CO2 tank that fits inside it.... If it is coming out a small vent hole between the threads and where the O-ring seals, deeper inside the adapter, it is the O-ring on the tank.... If the vent hole is inboard of the threads (ie on the knob side) it could be a seal inside the adapter....

Bob
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Rob112o

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Re: Co2 Bulk fill problem, Mac1 adaptor
« Reply #9 on: February 19, 2016, 08:15:44 PM »
If you look at the first image and click on it. It's hard to see unless you click on it. You will clearly see a hole on the black Mac1 adaptor. It's the opposite side of the 1/8 inlet. As I'm filling it's leaking out co2. Once I disconnect or shut the valve off. It doesn't continue to leak. The rifle is getting some of the charge and holding. It's just wasting co2 while I'm filling.
   Now, I can understand that hole may be for...if the rifle is left in a hot car and keeps heating up and pressure would be building up. It than would act like a self bleeder??

rsterne

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Re: Co2 Bulk fill problem, Mac1 adaptor
« Reply #10 on: February 19, 2016, 09:14:45 PM »
I can't tell from that photo where that hole is in relation to the O-ring on the tank valve....

Bob
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Rob112o

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Re: Co2 Bulk fill problem, Mac1 adaptor
« Reply #11 on: February 19, 2016, 09:54:06 PM »
That is looking down on the adapter. It's actually on the rifle in the top picture.
   I resized original image again and included the stock part so u can see where it's all at. You can also see the barrel in the top pic.
   I installed it on an angle so the fitting was off to the side. Figured it would make filling easier. Since I could lay rifle on the table and just hold the Co2 tank upright
« Last Edit: February 19, 2016, 09:58:24 PM by Rob112o »

rsterne

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Re: Co2 Bulk fill problem, Mac1 adaptor
« Reply #12 on: February 20, 2016, 08:44:33 AM »
OK, I think I finally understand.... That is a vent hole to vent the CO2 after you have filled the gun and turned off the CO2 supply.... No CO2 should come out there during filling, only after you loosen the male fitting screwed into it.... The area between the check valve in the bulk adapter in the gun and the tank valve will still be pressurized, and when you unthread the filling assembly could otherwise be thrown back violently.... That style bulk fill requires a seal between the adapter and the part that threads into it, where the bottom of the male threads bottom in the threaded hole in the adapter.... Either that seal is missing, damaged, or you are using the wrong threads.... Since it seals at the bottom, it is likely straight threads, not tapered.... they may be BSP threads.... You are using a tapered brass fitting, which is probably not screwing in far enough to seal....

I would suggest you contact Tim @ Mac1, and either purchase the fill fitting from him that is intended to screw in there, or find out what threads are required.... I'm sure he can sort it out for you....

Without closer examination, that is the best advice I can give you....

Bob
  • Coalmont, BC