Was assisting another FF in pressurizing a foam / water extinguisher - it was down to 100 Psi.
Since our station compressor only goes to 100 Psi, we had to use the "portable tank" - a "M" cylinder in a hand truck with a regulator and hose attached. It's been beat (and dropped) a great deal, and is missing the adjusting handle from the stem.
After having some problems with the foam backing up into the fill line, I looked at the regulator, and discovered that the regulated gauge was indicating about 80 Psi - so I broke out the "vise grips" to adjust the pressure up 30 pounds.
As I'm adjusting the Psi, I'm watching the gauge out of the corner of my eye (Dad taught me to never look directly at an energized workpiece), slowly rising.... 90..... 95... and BAM!!!!!!!!!!
Now my ears are ringing, there are pieces of plasitc everywhere, and a rushing noise. I thought the frangible (burst / overpressure) disc had blwon on the tank... then I realized that the self-coiling nylon hose had blown up.
I shut off the tank, and told my coworkers I was OK.
Turns out that the regulator was supplying the 200 Psi (max) hose at over 950 Psi when it failed. The gauge had actually gone past the "stop" pin to read as high as it did.
Glad it's just my ears ringing!
[This message has been edited by DougW (edited 03-04-2005).]
Crikey Doug. Be careful,mate!. Sounds like you might be in need of a regulator with a decent handle on it for a start. Also I'd be replacing the gauge as well, they don't tend to work as well, after they've been over-pressured. Compressed air has safety rules all it's own, it's sure dangerous stuff if it gets out of hand!.
I can hear better today, but the ringing's still there... of course, as a former punker, I've got tinnitus from before, so I know what to expect. Yay rah. :|
Took the regulator apart (the operating rod) and installed a handle, as well as two functioning gauges from another regulator that was pulled OOS due to cracks in the body. Have recommended replacing the whole unit.
The regulator was functioning fine - it's just some idjit had cranked on it up to a bazillion Psi. It's now down to a more reasonable 150 Psi.
If I could install a limit pin I would...
[This message has been edited by DougW (edited 03-07-2005).]
Re: WHAT? HUH?#150395 03/08/0505:24 AM03/08/0505:24 AM