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Technical Information
Description of the TwisTorr 305 FSQ & 305 SF
The TwisTorr 305 FSQ & 305 SF consists of a high frequency induction motor
driving a turbine fitted with 9 bladed stages and 3 MacroTorr drag stages. The
turbine rotates in a counterclockwise direction when viewed from the high vacuum
flange end.
The turbine is made of high strength aluminum alloy, machined from a single block.
The MacroTorr stages are in the form of three disks.
The turbine rotor is supported by permanently lubricated high precision ceramic ball
bearings installed on the fore-vacuum side of the pump.
The static blades of the stator are made of stainless steel. These are supported and
accurately positioned by spacer rings.
The MacroTorr stators are in the form of selfpositioning machined disks with
pumping channels and an opening restricted by the corresponding rotor discs.
These are made of an aluminum alloy.
During normal operation, the motor is driven at 1010 Hz.
Always ensure the pump is receiving proper cooling during operations.
WARNING
Improper cooling could result in damage to the pump.
According to the list in the following page, different P/Ns are available for:
Air cooling (air cooling kit X3500-68010 or X3500-68011 are recommended).
Water cooling (water cooling kit 9699337 is recommended).
The TwisTorr 305 FSQ & 305 SF is protected from overheating by a thermistor
mounted inside the pump. The signal from the thermistor is continuously
monitored by the pump's electronic control unit.
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Agilent TwisTorr 305 FSQ & 305 SF User Manual
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