I Know about PTFE tape, but we never use that because it is not save if you have to adjust the joint a litle bit.
Anyway I ordered a sample of ptfe tape 0.2 mmm thick special for large threads up to 2½" (normal thicknes is 0.05mm). but this is only for testing i'm still looking for something...
I use not only 2" thread but also 1" 5/4" and 1½", but,
not bigger than 2". Maybe i should try to explain, a litle
more about the system.
1)From the hydralic tank i go directly to a 2" ballvalve with 2" parallel threads, here i have the first 2 threads wich might be leaking(not allways)...
I have serious proplems in sealing large BSP threads 2", on stainless steel tupes, in hydraulic suction-line. Today i have tried with loctite 542 or omnifit seal 46M and activator VT2200, with no succeed. after a short while i have a leak!
