FX Impact M3 .25 Compac. I changed out the air gauge for the bottle to a Sekhmet digital gauge and I am noticing air loss, which didn’t happen before the switch. Should I put some blue loctite on the threads or is there something better.
Loctite
- Thread starter aklonewolf
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Teflon tape SHOULD seal it. In my experience Loctite doesn't always provide an airtight seal.
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Make sure you didn't lose an O-ring under the valve. Not sure if FX uses them but I know Edguns do.
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Yes there is I removed it and looked good. I decided to use blue loctite and it is holding air now.
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Blue Loctite has alway work for me as a thread sealant.
Make sure both surfaces a clean(acetone) and dry.
Also let it dry for at least 12-18 hour before you fully pressurize.
Stuart
Make sure both surfaces a clean(acetone) and dry.
Also let it dry for at least 12-18 hour before you fully pressurize.
Stuart
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I use rector seal that is used on household gas pipes as thread sealer on guns and automotive applications. It seems to work well and doesnt harden and make disassembly difficult.
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I have used teflon tape on 1/8 bspp with no problems at all. I do wrap it pretty well though.
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No need for ANY sealant, Loctite or Teflon. All are of no advantage. FX uses a clear sealant (not sure what) from the factory for the gauges and a PITA to scrape out.
After removing the FX gauge and X-ring, you will need a dental tool of sort, to work the residual sealant from the threads. I use Q-tip with alcohol to grab the scrapings and vacuum out the rest to make sure. Clean as a whistle.
Re-install the X-ring and screw in your new gauge just until it touches the X-ring and adjust the position to your liking. No more than 1 revolution is needed as the pressure of the fill will seal the gauge. No "extra" fuss or glue needed.
Patrick
After removing the FX gauge and X-ring, you will need a dental tool of sort, to work the residual sealant from the threads. I use Q-tip with alcohol to grab the scrapings and vacuum out the rest to make sure. Clean as a whistle.
Re-install the X-ring and screw in your new gauge just until it touches the X-ring and adjust the position to your liking. No more than 1 revolution is needed as the pressure of the fill will seal the gauge. No "extra" fuss or glue needed.
Patrick
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lol loctite will turn most plastics or rubber type compounds its anywhere near to a gummy mess or make them brittle given alittle time, good luck with that ..
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Check the FX parts list, they put what is called an X-ring down there, basically an 0-ring with a groove around the outside diameter, does not have to be tight, just enough to seal.
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I use a 4x2.5mm BN70 o-ring instead of the X-rings when I've had to replace mine. Works fine.
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Which Sekhmet digital gauge did you get? Apparently the small ones have issues as the base is not flat, or something like that.
Allen
Allen
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I agree with 2L8, just the X ring seal is needed. I do keep a stash of o rings(can’t remember size) of a thick n thin variation to stack on top of the X ring if I need to orient a gage to my view liking and it either isn’t sealing on the x ring and another whole turn is too much(you can ruin the seal and/or not get a pressure reading if turned in too much).
For what it’s worth, sometimes a thin coat of silicone grease on the old X ring has helped give it more life sometimes, not always.
For those few times I’ve had to use a Teflon type of tape, I use the thick black type and I also use a thin coat of blue NYLOG over the Teflon tape. Nylog, which is a very popular o ring conditioner/thread sealant used in the HVAC industry, is very elastic. A small bugger size goob on your finger will stretch 3’. It doesn’t not harden, so disassembly is easy even years later, and it takes high heat well(like some of the temps refrigerant get to). I’ve used it on transmission line connections and I am guaranteed no leaks.
For what it’s worth, sometimes a thin coat of silicone grease on the old X ring has helped give it more life sometimes, not always.
For those few times I’ve had to use a Teflon type of tape, I use the thick black type and I also use a thin coat of blue NYLOG over the Teflon tape. Nylog, which is a very popular o ring conditioner/thread sealant used in the HVAC industry, is very elastic. A small bugger size goob on your finger will stretch 3’. It doesn’t not harden, so disassembly is easy even years later, and it takes high heat well(like some of the temps refrigerant get to). I’ve used it on transmission line connections and I am guaranteed no leaks.
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