Recent content by woodruff13

One thing I'm curious about.. How dry does the air need to be? Worthington specs -53C dew point or the cylinder should be re-inspected every 6 months. Grade E is -50C dew point. Anyone have a specific target, other than "dry"? Anyone send an air sample for testing? I'd love to see posts...

Don't trust, verify.. Check any DOT certified tank you have. It will have something like "DOT-SP11194" on it. So for the seller, ask for a picture of the label listing the DOT-SPxxxx number. Here is where may are...

I missed your comment on "45 minute/66 cu ft SCBA tank". Given the 45 minute tank is 6.8L, why 66 cu ft where someone else claims the same tank is 71 or 74 cu ft? It could be that the 66 cu ft assumes a minimum usable pressure. In other words, if it assumed the 4500 psi tank was only able to...

Our sport does a great job of confusing people.... "Water Volume" is what I like to use. It is the actual volume of the cylinders. Liters can convert to cubic ft, but then you add a multiplier for pressure, and then a fudge factor for 'residual air'. Very confusing. We use SCBA cylinders...

Microbore hoses don't have much volume, I expect there is a different culprit. Back of the envelope.. Microbore on the AV website says DN2, which I believe is 2mm. Cross sectional area is pi r squared, so 3.14mm2, which is .00000314m2. 40" is about 1m, so that is .00000314 m3. There are 1000...

Just browsing old threads.. There are two thread sizes spec'ed for the US. Most SCBA threads are the 7/8. Once you get to 114 cu in, and down to paintball, you'll find the 5/8. There is a good spec on these, AS5202. The 5/8 thread is defined as AS5202-7. US tanks are certified by DOT...