we have run several thousand analyses with our Kiel IV and did only have to replace one of the gold stamps. As long as there is no dust coming into the machine, these valves last very long (they are identical to the valves used in the Termo/Finnigan mass spectrometers [at least DeltaPlus and MAT253]). The only issues that we routinely have with the valves is that the grease becomes very sticky with time (due to the 70°C) and the valves do not move properly anymore. We clean the piston and add new grease from time to time (e.g. after 2 years). That is likely necessary because we are not using the optimum grease for that temperature.
On Monday,04.03.2013, at 15:37, Adam Porowski wrote:
> Dear Colleagues,
> I wander how often are you having to repair the pneumatic valves no. 13 and 23 on KIEL Carbonates Device, that is, how many samples can be done between changing the gold stamp and gold gaskets of the valves??? Recently we have to change these stuff and I wonder how it looks in other labs.
> I look forward to hear from you.
> Thank you in advance.
> Adam Porowski
> ING PAN, Warsaw, Poland
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