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6890/7890/8890 Actuators for rotary GSV valves

Question asked by topsoe-lak on Jul 20, 2020
Latest reply on Oct 15, 2020 by james_jenkins

Hello Agilent,


One of my colleagues has ordered a replacement actuator ( 19325-60660) for activating a two-position 10-port rotary valve for GSV injection on a 7890B gas chromatograph. The old actuator assembly is obsolete. And we got instead a new type of actuator ( G3440-60665).

However, there was no small "reducing cylinder" delivered with the new actuator for correcting the rotor wandering to 36° only when using a 10-port valve.


I have searched for details regarding the new actuator in the 8890 Gas Chromatograph Maintaining Your Gas Chromatograph (GC) manual, but found only information regarding the old type actuator model …??


Could you please help with part number for the reducing cylinder used for the new type actuator? Also, we really need an updated manual, containing exploded views and parts description regarding this new type of actuator.


Please see attached photo of the old and new types of actuators as well as old actuator description from "8890 maintaining your GC" manual.


Where can we find the comprehensive "8890 GC Service Manual"...?


Best regards -

Lars Kürstein