Pump Description - Agilent Technologies 8698928 User Manual

17 Technical Information
Description of the TV 401/301/21 NSF

Pump Description

The pump consists of a high frequency motor driving a turbine with
three pumping ports and 3 Macrotorr 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 Macrotorr stages are in the form of 3 discs.
The turbine rotor is supported by permanently lu-bricated 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.
The Macrotorr stators are in the form of self-positioning machined
discs with pumping channels and an opening restricted by the
corresponding rotor discs. These are made of aluminium alloy.
The nominal rotational speed is 60 krpm. The pump can be water
cooled or air cooled: in the first case the customer can use the
dedicated channels on the pump body, in the second case an external
optional fan is available.
A thermistor sensor is mounted near the upper bearing to prevent
the pump from overheating.
The pump can operate in any position and must be supported on the
flange. The connection of the forevacuum on the side of the pump is a
KF16 flange.
240/294 TV 401/301/21 NSF User Manual / 87-900-995-01 (D)