Chub & Steve,
We swapped in our replacement of Varian V70D "bear-can" turbo as factory clean.
The new Agilent TwisTorr 84 FS turbo pump [ model x3502-64002, sn IT17346059 ] with intake screen, fan, vent valve. The controller [ model 3508-64001, sn IT1737C383 ] and a larger drypump IDP-7, [ model x3807-64010, sn MY17170019 ] was installed.
Next things to do:
- implement hardware interlock to close V4 at 80% pumping speed slowdown of "standby" rotation speed, estimated to be ~ 40,000 RPM ( when Standby 50K RPM )
- set up isolation valve in the foreline of TP2, with delayed start of the IDP-7 and/or use relay to power drypump. This turbo controller can not switch off or start of the dry pump. [ Agilent isolation valve #X3202-60055, with position indicator, pneumatic actuation, 115V solenoid ]..........as a second thought, we do not need isolation valve if we go with the relay option. The IDP-7 has built in delay of 10-15 sec
- test performance of new turbo
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