6,000 P.S.I. air thread seal

[Loopster]

I have a metal High Pressure air cylinder which developed a small leak at the threaded connection to the brass valve. I've seen Loctite 545 and RectorSeal #5 thread sealants, but their rating is 3,000 and 2,600 PSI. Any recommendations on sealants to fill to 4,500 PSI? Thanks Lupe G.

 

[Ca_Varminter]

I have used Blue Loctite..242, Also mil-spec teflon tape...
without leaks on my 4500 psi compressors

 

[fivestar45]

I have a metal High Pressure air cylinder which developed a small leak at the threaded connection to the brass valve. I've seen Loctite 545 and RectorSeal #5 thread sealants, but their rating is 3,000 and 2,600 PSI. Any recommendations on sealants to fill to 4,500 PSI? Thanks Lupe G.

Several years ago a Hydraulic Jack repair shop told me they used LocTite 518. I have been using it for a while now. I did try several other Loctite products before ..242, 539, 545, not much luck. The 518 is easy to find and reasonably priced..it's meant to be a Anorobic gasket maker. Just be sure to get everything real clean, apply to the male threads, assemble, and let cure for 24hr's.

 

[Airgunmann]

Teflon tape rated to 10,000 psi I've used for certain things as well

 

[Loopster]

Thanks for all the help. Appreciated all Info.

 

[rcs9250]

Are the threads NPT or BSPT (tapered threads ) or NPS or BSPP ?

 

[Ca_Varminter]

Rule of thumb.......
If it has straight threads... It should have a seal... Like an O-ring or bonded sealing washer(Dowty)
Tapered threads.. use sealant... teflon tape, loctite...etc. on the threads