Edwards High Vacuum EO50/60 Air-Cooled Diffusion Pump B302-11-090 HP 5971

Edwards High Vacuum EO50/60 Diffusion Pump. NW50 centering ring with O-ring. NW10 centering ring with O-ring. Pump fluid has been drained.

Pump was using Santovac 5 fluid and. Contains traces of pump fluid, you must refill it. With the same type of fluid. If it is necessary to use a different fluid, you must clean the pump thoroughly. Before you fill it with a different fluid.