This page is currently a collection of links from the run diary where the process of opening up the needle valve is described. The aim of this page is to write down those steps clearly so that it can turned into a procedure for reference.

Needle valve was opened in May 2018 to replace the o-rings inside it. The symptoms at that time was: Opening the needle valve by a few degrees, doesn't lead to any pressure change in 1K pot after the initial LHe transfer step.

This run diary entry lists a few steps to look at the issue.

This run diary entry describes the actual steps to open the needle valve with a few pictures.