Page 1 of 1

how much flow from a Rock regulator?

Unread postPosted: Sun Jan 18, 2009 6:02 pm
Author: spudamine
Ok so a while back I saw a palmer's micro rock regulator on E-bay for a good price and snapped it up, that kind of kit is quite hard to get hold of in the UK. Now its time to use it I was wondering if anybody familiar with this reg, or just more knowledgeable about such things in general, could answer my Question. I want to know approximately how long it would take to fill a chamber of about 50cm^3 (~3 cubic inches) with the output set to the max of 300psi.
The output on the regulator is a rather puny looking 10-32 thread which attaches to what I think is 5/32 microline.
If the flow through this microline is too low, would there be any point in replacing it with something bigger or would the 'bottleneck' be inside the regulator itself?
I've put up some pictures of the beast:

Edit: as nobody seems to be biting (this must be a first in spudfile's history, no replies in 24h :( ) I though I would furnish some more details. I will be using this reg. on a small semi-auto dart gun to reg down a couple of 12g CO2's to 300psi. I will trigger using a slide valve and will be using part of the chamber as a pneumatic ram to feed ammo from a magazine.
What I need to know is how long it will take to fill the chamber with this regualtor as this will limit my rate of fire, I can't test it out myself as I don't yet have all the correct fittings. If the flow is insufficient to fill the chamber in a couple of seconds can the reg. be modded to increase its flow? I had thought about drilling out the 10-32 thread and re-tapping it with a 1/8, and maybe putting in another one on the other side, but this won't do anything if the flow is restricted elsewhere. The other way to increase flow would be to mod the reg for a higher output pressure but I don't know if this is possible, and it's the more dangerous option.
Any advice would be much appreciated.

Unread postPosted: Tue Jan 20, 2009 8:42 am
Author: grumpy
this may help you. ... chart.html

if you do not find what you need there , i sugest you ask your question on there forum , i'm sure Craig will be happy to help out.

Unread postPosted: Tue Jan 20, 2009 6:27 pm
Author: spudamine
Thanks for the tip, I didn't find anything in the link but a rummage around their forum turned up some useful imformation, I think the flow should be ok but just to make sure I'll tap in another outlet opposite the first one. The best thing I discoved is that a 10-32 thread is just about interchangeable with a metric M5 which will make it a lot easier to get some fittings. C02 powered spudgunning armageddon comes a step closer...