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Discussion Starter · #1 ·
I just installed my MA957 and the left gauge reads a constant 700psi and the right gauge stays at about 130psi regardless of which way I turn the black regulator gauge.

I pulled the 957 off the cylinder and the right gauge stayed at 130psi until i turned the knob a little and then a puff of air shot out and the pressure went back down to 0psi on the right cylinder.

Right now I"m running the regulator anyway since I can monitor the bubbles via the needle valve but i barely crack open the needle valve and the bubles are going pretty quickly already.

Anybody have any idea what's going on?
 

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Discussion Starter · #2 ·
Ok I guess I don't understand how this thing works...

I can't seem to use the needle valve to adjust the flow very well at all. If i barely crack open the needle valve the bubbles start coming out like crazy.

So I guess I'm supposed to adjust the black knob, but as I turn the knob clockwise the right gauge output pressure goes UP? Isn't turning the knob clockwise supposed to close it?

And how far am I able to turn the black knob counter clockwise? It starts getting really loose and then eventually feels like its coming right off
 

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Hi, try doing the following: turn the black knob counter-clockwise until it is very loose, like about ready to fall off loose.The right gauge should read zero at this time. Then slowly turn the knob clockwise until you get a reading of about 20 psi on the right side gauge. This should be good, then use the needle valve for more of a fine tuning of the bubble rate. Here is a link with info on the regulator you have http://www.plantedtank.net/forums/planted-tank-faq/18272-milwaukee-ma-957-co2-regulator-instuctions.html
If you still have problems after this, let us know and someone should be able to help you further. Hope this helps,
John
 

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IMO this thing is a POS! mine has given me nothing but problems since day one and i'm sick of it. i just bought a JBJ regulator! sorry if this offends anyone, but i would never the milwaukee regulator.
 

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Discussion Starter · #5 ·
Hi, try doing the following: turn the black knob counter-clockwise until it is very loose, like about ready to fall off loose.The right gauge should read zero at this time. Then slowly turn the knob clockwise until you get a reading of about 20 psi on the right side gauge. This should be good, then use the needle valve for more of a fine tuning of the bubble rate. Here is a link with info on the regulator you have http://www.plantedtank.net/forums/planted-tank-faq/18272-milwaukee-ma-957-co2-regulator-instuctions.html
If you still have problems after this, let us know and someone should be able to help you further. Hope this helps,
John
Yeah, I've tried that I think...

Turned it all the way CCW until it was about to fall off, with solenoid plugged in, needle valve all the way closed.

Turned it CW until ~20psi, then once I crack open the needle valve even a tiny bit the bubbles start going crazy.

A half turn of the needle valve looks like maybe 20 bubbles a second. To get down to what I need ~0.5-1 bubbles/second I can only barely barely open the needle valve.

Is that right? Seems like a waste of the 4-5 full turns the needle valve is capable of.
 

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Yeah, I've tried that I think...

Turned it all the way CCW until it was about to fall off, with solenoid plugged in, needle valve all the way closed.

Turned it CW until ~20psi, then once I crack open the needle valve even a tiny bit the bubbles start going crazy.

A half turn of the needle valve looks like maybe 20 bubbles a second. To get down to what I need ~0.5-1 bubbles/second I can only barely barely open the needle valve.

Is that right? Seems like a waste of the 4-5 full turns the needle valve is capable of.
I don't really think it matters how much the needle valve is open, as long as you get the desired bubble rate. I have mine open very slightly also and it works fine like that.
 

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Discussion Starter · #7 ·
Alright then, I guess I had it.

I jsut recall reading that needle valves are very precise and this doesn't seem so precise to me lol.

A tiny change in the needle valve position changes the bubble flow rate a lot, I was just expecting the opposite.

Thanks for your help!
 

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Alright then, I guess I had it.

I jsut recall reading that needle valves are very precise and this doesn't seem so precise to me lol.

A tiny change in the needle valve position changes the bubble flow rate a lot, I was just expecting the opposite.

Thanks for your help!
From what I've experienced and read about others experiences with these regulators, the needle valves are not very precise at all. I mean mine works but it's no Clippard needle valve that's for sure.
John
 
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