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Description of the TwisTorr 305-IC
The TwisTorr 305-IC consists of a high frequency induction motor driving a
turbine fitted with 8 bladed stages and 3 TwisTorr drag stages. The turbine
rotates in an 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 TwisTorr 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 TwisTorr stators are in the form of selfpositioning machined disks. On each
disk there are parallel spiral pumping channels designed to pump in centrifugal
direction on one side and in centripetal direction on the other side. These are
made of an aluminum alloy.
During normal operation, the motor is driven at 1010 Hz.
WARNING!
Always ensure the pump is receiving proper cooling during operations.
Improper cooling could result in damage to the pump.
According to the list in the following page, different P/Ns are available for:
▪
▪
The pump 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.
If the thermistor reading exceeds the predefined maximum level threshold or it
is lower than the minimum level threshold, the 305-IC stops with 2 different
error cordes (see controller paragraph).
The pump can operate in any position but is required to be supported by the
high vacuum flange. The connection of the fore-vacuum on the side of the pump
is a KF 16 NW flange (KF25 – optional).
TwisTorr 305-ICUser Manual / 87-901-058-01
Air cooling (air cooling kit X3500-68010 and adapter kit
X3514-68001 are recommended)
Water cooling (water cooling kit 9699337 is recommended).
Technical Information
Description of the TwisTorr 305-IC
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