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0 pointsVLM3y ago0 comments

Tape causes massive contamination problems with fuel and hydraulic systems.

Its not that the Teflon reacts with hyd oil, its that the inevitably little tiny bits of stuff physically jam/ruin seals and clog nozzles.

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culopatin3y ago

But only if you put the tape over the edge. I usually leave the first 2 threads uncovered, why would it fall into the stream if you don’t cover the tip of the thread with it?

VLMOP3y ago

The most installed/removed NPT thread will leak the most thus have the most tape added and the scraping of installation/removal will guarantee teflon contamination of the system eventually.

You are also correct in that something installed one time for the lifetime of the system, especially with some care and attention to cleanliness, is almost certainly OK.

kevin_thibedeau3y ago

When you open up the joint, bits are left behind in the female half. Then they get pushed in when it's resealed.

lazide3y ago

The tip of the thread in NPT is the one that needs the lubrication the most, hah.

Pipe Dope causes similar issues though.

j / k navigate · click thread line to collapse