Operating at 42,000 rpm, it provides an ultimate pressure of 10-8 bar (10-6 Pa) with a dry fore pump
. Variations on this pump include a three-stage Holweck pump for increased compression ratio.
In 2012, two additional vacuum units were ordered and installed, also with Cobra fore pumps
and Panda Roots booster pumps, to supply a complete line of 12 thermoforming machines.
Therefore, we consider promising to replace one of the buran's two fore pumps
groups with the required number of curved canals (closed loop).