1-Stage glass diffusion pump manufactured by PWL type "PDS/P"

I called this pump "PDS/P" because "Pompa Dyfuzyjna Szklana z chłodzeniem Powietrznym" would be translate as "Glass diffusion pump with air cooling".
This pump is simple, homemade version of Langmuir's diffusion pump- in Langmuir's pump is water cooling.

fig.1. Glass oil diffusion pump type PDS/P
It's necessary to use good rotary pump, because fore-pressure is ca. 10^-2 Torr. The ultimate pressure is 1.5* 10^-4 Torr.
The quantify of pump fluid is 15 ml. It's recommended to use good silicon oil, for example DC705, Santovac, Invoil).

fig.2. Diffusion pump during working

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