They are incredibly lucky...and there appears to be fuel still exiting the PP, what a nightmare
We have one of the first pressure pro's but they do need maintenance and trained people to run them safely. Also you need to add a couple adjustments to the fuel cell to make them work better. Turning the pressure up or screwing with the relief valve is a big mistake and as you can see very risky.Steve
thank you and you would be right. Haha
if you read further in the thread I bailed on the 55 gallon drum idea and ended up getting a pressure Pro. We have used it at two races now and love it.
I got a lot of flack from guys saying the PP is not safe. So with all the discussion here on this thread about the PP I figured I would add to this thread.
"Regulated" implies a DOT regulation, a US standard, which would not mean anything outside of the States but would give proper indication of capacity. FYI seamed cylinders are required to be tested to double the rated capacity, seamless "3A and 3AA" cylinders are required to be pressured tested to 5/3 working pressure. This is not a knock on American Fuel Tanks or whoever is manufacturing these things, but I highly doubt they have a certified RIN for the manufacturing of DOT regulated pressure vessels, I could be wrong though.... I should add that they are not required to be certified as these tanks are not transported under pressure, the manufacture in this case is not at fault as a cylinder setup to run at 15psi should not ever be expected to operate at 100 psi100 psi tested tanks really means 5-10 times + that pressure to pass safety. Margins are always built into safety testing for liability issues. This team played with danger and danger found them. Count blessings big time that there wasn't an ignition. I have never been in favor of pressurized fueling because it is VERY dangerous, regardless of how safe the manufacturers try to make it, we are STUPID racers who think we are smarter than them. Stupid Human Tricks in the end always find the failure point. Indy banned pressurized fuel way back in the 1960s and there wasn't even a fire from it. A team simply didn't tell officials that their system was pressurized and when it started to leak, the pit crew ran away while everyone else was wondering why they ran! Again, no ignition, just the fact h=that the crew knew they had a bomb in their pit that could go off when things went wrong. This is where it gets ugly. Had that thing exploded with fire in a pit with lots of spectators around, guess when the next race would be?
@MTPyle or one of the other owners could tell us what model PRD is on the cylinder itself. If you cant tell take some pictures and post them, include especially any writing on the PRDitself. Just as an FYI there are plenty of one time use DOT approved PRD's on the market that are relatively cheap and tamper proof. You could utilize these and if it pops, you unscrew and install a new one relatively quickly.Who calibrates the PRV ? And at what interval does it get calibrated ? I would be tempted to run two PRVs just in case. The adjustment device should be tagged w pressure setting and sealed in a way to prevent adjustment w out breaking the seal.
I have worked in an industry where we use relief valves. my job was trying to figure out why things didn't always work as designed. turns out, while relief valves are pretty reliable, however, they can fail and there are quality control issues with some vendors and sometimes you get what you pay for. I'd be vary of any system that relies on a single pressure relief valve to insure the safety of the equipment and personnel. also, equipment that allows users to easily modify/defeat a safety function should be a red flag as well. A good example, is the engine brake on push lawn mowers; easily defeated, so many people do it and might as well not have it.Figured I would put this here rather than clog up the B500 thread. This thread is the most recent thread discussing Pressure Pro
Reports are that a Pressure Pro failed and exploded at the B500 seriously injuring a crew member during the set up process.
I know there are many that think this system is dangerous and it can fail, maybe they are right? Or it was miss use?
clearly I am very interested in what failed. Was it a process or equipment failure?
I am being told on this system the pressure relief valve was wired shut to run higher pressure than 15lbs. I have no proof of this but it does make sense as how could the tank fail with a relief valve?
Hopefully someone can verify this claim of closed relief valve or has some more inside information. These things are always difficult as nobody wants to admit what went wrong so it makes it hard to learn from.
I could care less who messed up or who is to blame. I just want to learn what happened so we can make sure it does not happen to us.