Team MedBots

**Bodge Job** · 13th May 2012, 09:13

Screwed up? I thought it you were sopost to tighten it? Unless I'm just reading it wrong...

**Max** · 13th May 2012, 09:27

Ok, I been trying to get it to work and the regulator is acting very strangly,
We've starting off the the end cap almost completely undone then screwing it on slowly until it got to the desired pressure. We then fired the ram and the pressure wouldnt go back up and stayed very low. We tighting up the end cap a very little bit further, dumped the system and pressure up (by gently turning in the valve on our fire extinguisher) then the pressure went off the scale in under a second and the ram fired with extreme force, we then dumped the excess gas and there was a lot more than usual in the pipes. We we not using a buffer tank but had very long pipes.

Can someone please tell me what I did wrong?

**Bodge Job** · 13th May 2012, 09:32

Do it in the other direction, screw it up tight, so that it's at the lowest pressure, and slowly unscrew untill you've found the pressure you want. Or your over pressurising the system, and the gas can't flow back though the reg, so it remains at the high pressure.

**blazerbotics** · 13th May 2012, 09:44

Screwing it tight will increase the pressure. Sound like your doing it right, im guessing its sucking liquid through, if your bottles laying flat you could do with a dip tube in it, as i had this problem with Ratchet. Next time you test it try it with the bottle standing up see if its any better. As for it not repressurising, the only thing i can think off is the reg is sticking, was the regulator cold?

**Max** · 13th May 2012, 10:23

The bottle was standing upright, it was a fire extinguisher bottle. The regulator did get cold.

I am still trying to figure this out, is it the tighter the end cap is on the greater the pressure or is it the tighter the end cap is on the lower the pressure?

**Max** · 13th May 2012, 10:24

Also how do people usually set their regulator? Do you just connect a pressure gauge straight into the regulator ?

**blazerbotics** · 13th May 2012, 10:37

The bottle was standing upright, it was a fire extinguisher bottle. The regulator did get cold.

Fire extinguisher will have a dip tube, so your pulling liquid straight through, they it with the bottle upside down. You should be able to put the gauge directly on the reg. Unscrew the reg all the way out, then wind it in until you reach the desired pressure.

**maddox10** · 13th May 2012, 10:55

No avarage gas regulator can cope with liquids.

By using the extinguisher upright, you're feeding liquid CO2 in the Trev.
If you did set it very low, the reg is closed. And won't let the liquid flow trough.
But a tad higher and the liquid will enter your setup. Depending on total volume in the setup, and the function of the low pressure relief valve, you can get ripping hoses or failing low pressure push locks/couplings, damaged valves , or the worst case, exploding buffers. (luckely you didn't have one)

Concerning pressure gauges and Trevor regulators.
The Trevor has 1 1/8 bsp outlet, that's the low pressure side. You'll need a T-piece (or 2) to have a dump/low pressure PRV and gauge on the basic setup.