travis.sadecki@LIGO.ORG - posted 18:15, Tuesday 19 October 2021 - last comment - 18:39, Tuesday 19 October 2021(60332)
EY vent and turbo pump station progress
Gerardo M., Kyle R., Travis S.
Today, we vented EY with purge air in preparation for the turbo pump station upgrade and future in-chamber work. Purge air dewpoint was measured at -40 degrees Celsius.
The old turbo pump station was decoupled from the 12" port and the Cetec isolation valve was removed. A new VAT isolation gate valve was installed on the port and the flange was torqued to metal-on-metal. Leak testing will be performed once the turbo station is attached. The new turbo station was rolled into place and the threaded anchor marks were verified to be in the correct position. Tomorrow we'll embark on core drilling the anchor holes and connecting the new turbo station to the VAT valve.
A couple of photos of the 12" port for the turbo station. Some discoloration can be seen after removal of the Cetec valve, some of which we were able to wipe off with IPA wipes, some not. There is also a small ding on the knife edge at the 9 o'clock position.