Left C;60660 said:Extremely nice work! You may want to add and extra check valve between the deal needle valve and the JB BC. It might leak. Get as low a cracking pressure that you can find. Swagelok has some 1/3 psig models. Parker and Clippard has some too, but I'm not sure of their rating. Just remember that 1 psig = approximately 15 psi. It's really 14.7 psi, but 15 psi is just easier to remember.
The reports of the check valve leaking in the JBJ BC have been quite rare though. My 4 year old 52-1-12 with its JBJ BC hasn't leaked.
the swagelok part numbers are:
stainless: ss-2c2-1/3
brass: b-2c2-1/3
stainless is three times the price of brass.