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Tools
Mar 6, 2019 15:51:20 GMT -8
via mobile
Post by technidiver on Mar 6, 2019 15:51:20 GMT -8
OKAY, this isn't a hardware tool, but a good little trick Jay taught me for diaphragm regs. An easy way to see if you have a problem regarding your HP seat is to assemble all the regulator except your IP spring, HP diaphragm and cover, etc. Put the regulator on a tank. Put on some SAFETY GLASSES, and then put your thumb on the pin support (little mushroom looking thing that goes on the pin) and then turn on the air and just hold it in place.
You'll notice that if you push down (increasing IP) you can get a leak or see how the airflow changes. That's pretty much the whole purpose of the diaphragm and spring.
If the reg starts leaking like crazy, your seats gone to Sh*t!
TD
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Tools
Mar 6, 2019 16:02:31 GMT -8
Post by nikeajax on Mar 6, 2019 16:02:31 GMT -8
TD, close: you only put the pin/blunt-object in after it's held pressure, never while in the act of the test. But hey: no harm, no foul JB
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Post by SeaRat on Mar 6, 2019 16:40:22 GMT -8
OKAY, this isn't a hardware tool, but a good little trick Jay taught me for diaphragm regs. An easy way to see if you have a problem regarding your HP seat is to assemble all the regulator except your IP spring, HP diaphragm and cover, etc. Put the regulator on a tank. Put on some SAFETY GLASSES, and then put your thumb on the pin support (little mushroom looking thing that goes on the pin) and then turn on the air and just hold it in place. You'll notice that if you push down (increasing IP) you can get a leak or see how the airflow changes. That's pretty much the whole purpose of the diaphragm and spring. If the reg starts leaking like crazy, your seats gone to Sh*t! TD I said I would not post, but this is a safety issue. Don't do this! You could conceivably auto-inject air under your skin of your thumb or finger. There are better ways of determining this, and I'll let someone like Herman explain the better ways. John
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Post by nikeajax on Mar 6, 2019 17:20:18 GMT -8
John, I use a long blunt probe for this procedure, and only after I've turned off the air...
JB
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Post by technidiver on Mar 6, 2019 19:10:50 GMT -8
Thank you John and Jay for correcting me! I've done it several times and never had the IP do anything too crazy, it hasn't shot the pin out either. Compressed air under the skin is bad, very bad. At least I mentioned wear safety glasses LOL!
TD
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Post by nikeajax on Mar 6, 2019 19:21:39 GMT -8
Let this be a lesson, never give special instructions with sleep deprivation--YAHOOOOOOO! Sorry for any misunderstandings! JB
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Post by vance on Mar 6, 2019 19:55:42 GMT -8
Jim Steele taught me a little trick: If you have a leak, turn off the air. Then open the LP seat. If you get a puff, that means the LP seat is probably holding, but the HP isn't. The tiny puff of air comes out of the second stage.
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Tools
Mar 8, 2019 11:50:59 GMT -8
Post by vance on Mar 8, 2019 11:50:59 GMT -8
I highly recommend the first stage assembly tool Herman makes. It makes assembling the DAAM/RAM valve a piece of cake. Not so easy using circlip pliers. It also works on others with the same size filter/snapring.
If you're working on an MR12/Trieste/Titan II regs, Herman's HP valve installation/removal tool is nearly essential.
Both are inexpensive, but high quality.
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Post by herman on Mar 8, 2019 14:04:36 GMT -8
OKAY, this isn't a hardware tool, but a good little trick Jay taught me for diaphragm regs. An easy way to see if you have a problem regarding your HP seat is to assemble all the regulator except your IP spring, HP diaphragm and cover, etc. Put the regulator on a tank. Put on some SAFETY GLASSES, and then put your thumb on the pin support (little mushroom looking thing that goes on the pin) and then turn on the air and just hold it in place. You'll notice that if you push down (increasing IP) you can get a leak or see how the airflow changes. That's pretty much the whole purpose of the diaphragm and spring. If the reg starts leaking like crazy, your seats gone to Sh*t! TD I use a similar check the HP seat of diaphragm stages. I assemble the HP assembly except for the pin and pin pad. Pressurize the reg or nozzle (DAAM or RAM for example) using a pony or a special hose I have then submerge it in water. If the HP set is leaking you can see it, even very small leaks. I then install the pin and pin pad and cycle the HP seat a few times by pressing on the pin pad then back in the water for another check. If all is good, I depressurize with the pin and pad. There is no real danger of injecting yourself with HP air since your finger is on the back side of the fairly wide pin pad and all the air exhaust are located up on the reg/nozzle away from your fingers. Glasses are still a good idea. This is a huge help if you are chasing a leaking HP assembly. It's a lot easier to dissemble, adjust and retest this way as opposed to completely assembling the reg and checking IP only to have to dissemble the entire thing again. I also test assembled DA/RAM main bodies for leaks the same way before putting them in the cans.
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