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Technical Information
Description of the TwisTorr 74 FS
Figure 7
Model X3502-64173
Pump Description
The TwisTorr 74 pump consists of a high frequency motor driving a
turbine fitted with 9 bladed stages and 3 TwisTorr drag stages. The
turbine rotates in an anticlockwise direction when viewed from the
high vacuum flange end.
The turbine is made of high-strength aluminium alloy, machined from
a single block. The TwisTorr stages are in the form of four disks.
The turbine rotor is supported by permanently lubricated high
precision ceramic ball bearings installed on the forevacuum side of
the pump.
The static blades of the stator are made of stainless steel. These are
supported and accurately positioned by spacer rings.
TwisTorr 74 FS User Manual / 87-901-053-01
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