Soft seats or 'Del' seals are the answer, they can be replaced unlimited #
times, made of annealed copper, aluminum sometimes SS.
They are available in tubes of 25 or 50 even individually packaged.
If there is enough play in your line you can cut the bad flare off and
reflare the tube.
Ken
On Mon, Jan 4, 2021 at 8:02 AM Ed Kelleher <Pres@xxxxxxxxxxxxx> wrote:
How often can 37 deg flare fittings be disassembled and reassembled?
For example LOX -16 duct to ball valve or TC (thrust chamber)?
Does the male mating surface on the valve or TC wear to the point of not
getting reliable seals?
Are there problems using aluminum tube? with stainless hardware?
What's a good flare reference source?
Swagelok has limited break/make capability.
Ed Kelleher