Complete Leak Check, CO2 pressurized system

[D-Linquent]

Originally Posted by Bettatail

it is fine from 40 to 38 psi in 15 hours. if it is a slow leak on LP side, it is micro and insignificant, but what worry me it is the HPG lower, by how much?

Almost imperceptible. It was such a small change, that I wondered if it actually changed, or if it was a function of me looking at it at a different angle.

I reassembled everything, and I have had it running into the tank for a couple of hours. So far so good. It is holding its working pressure. We'll see how long the tank lasts.

[Bettatail]

Originally Posted by D-Linquent

Almost imperceptible. It was such a small change, that I wondered if it actually changed, or if it was a function of me looking at it at a different angle.

I reassembled everything, and I have had it running into the tank for a couple of hours. So far so good. It is holding its working pressure. We'll see how long the tank lasts.

sounds good, show a picture of your DIY once it is ready to serve, it is an inspiration for others who want to build their own.

[D-Linquent]

I will take a picture, but my unit looks pretty rough compared to the stuff I see on here. Ha!

It worked all day yesterday though. I'm so excited. It's going to be weird not to have a project. I need to start planning what I'm going to do next.

[drewsuf82]

Awesome. Passed with flying colors

[Dalban]

Unless I've missed something, I believe there's an import test that's missing from the set of procedures outlined in the first post. Folks should run a stop test to validate that their regulator is actually regulating accurately. Otherwise, when their solenoid closes, pressure could build up on the LP side (and then they'll dump their cylinder via the relief valve).

This procedure can most easily be added to step 3:

B1. Open solenoid valve.
B2. Check LP side is at desired level (e.g., 30 psi).
B3. Close solenoid valve.
B4. Wait 10-15 mins; check LP gauge hasn't increased more than 1-2 psi.

C. (carry on the rest of step 3).

[Bettatail]

Originally Posted by Dalban

Folks should run a stop test to validate that their regulator is actually regulating accurately. Otherwise, when their solenoid closes, pressure could build up on the LP side (and then they'll dump their cylinder via the relief valve).

I think I've already mention this problem in this or some other related threads, it is internal poppet valve leak, so the LP pressure slowly climb even the regulator at off position, and the build up pressure at the LP side will eventually damage something, push through the solenoid or the relieve valve if there is one.
perform a blow test, may or may not fix the problem.

If the problem persists after the blow test, it is broken, and such problem are commonly seen on commercially available regulators.

I will add this to the steps, thanks.