The compressed air ASCO valves for the M9BB, M20BB, T1 Profile Monitor (2x 8342C1 [rebuild kit 306-191] + 1x 8320G216 [rebuild kit 314-949] respectively), and T2 Profile Monitor (8320G216) were serviced with their rebuild kits.

To service these valves, we isolated them from the compressed air source by shutting off the outlet valves on the air amplifiers and venting the compressed air through the shared inlet lines (see photo).

When reinstalling the T2 profile monitor valve, there was some difficulty turning one of the Swagelok nuts. It would be a good idea to prepare spare tube fittings to replace any that no longer seal properly.

We can re-energize the air amplifier and check for leaks in the valve in the coming days (tube of soap solution brought to red toolbox on blocks)

The actuation of the T1 profile monitor and T2 beam blockers (M9 & M20) can be checked shortly after the air amplifiers are re-energized.

When the T2 target is returned to the station, we can check the actuation of the T2 profile monitor.