LEYBOLD MAG Series User Manual

GA05141_0702 - 09/2004
90
Maintenance
4 Maintenance
4.1 Cleaning
If required clean the turbomolecular pump and the frequency converter of
dust with a dry cloth.
4.2 Changing the rotor
The rotor has to be changed at the latest
■ after 40,000 hours of operation or
■ after 5000 starts/stops or cycles
Refer also to Section “3.4 Operation at high gas throughput or high foreva-
cuum pressure”.
Due to high-speed and temperature, the service life of the rotor is
limited.
If the rotor is changed too late, it may be destroyed. Thus in the
flange mounts high forces and torque conditions can occur.
The mounting screws for the pump may be torn off. When
using clamped flange connections at the housing or with compo-
nents above the housing, sudden twisting of the entire pump can
be experienced.
The pump’s operating hours are displayed at the frequency converter (see
Sectiont 3.10.2 ).
A warning message appears after 37,000 hours of operation and after
3700 starts/stops or cycles.
Only the Leybold service can change the rotor.
4.3 Changing the touch-down
bearings
Wear occurs at the touch-down bearings when hard shocks have to be
supported.
Maintenance is also required after removing the bearing cable during ope-
ration of the pump. Under these conditions the rotor can not be controlled
by the magnet bearing and the pump will have a full run down on the touch-
down bearing.
Only the Leybold service can change the touch-down bearings.
Warning

LEYBOLD MAG Series Specifications

General

Applications	Laboratory, medical, and industrial applications
Drive	Magnetic drive
Sealing	Hermetically sealed
Flow Rate	Varies depending on the model, ranging from a few liters per minute (LPM) to several tens of LPM. Consult specific model datasheets for precise values.
Max Pressure	Varies by model (typically up to 10 bar)
Power Supply	Typically available in various AC voltages (e.g., 115V, 230V) and frequencies (50/60 Hz)
Power Consumption	Varies depending on the model, ranging from a few watts to several hundred watts. Consult specific model datasheets for precise values.
Operating Temperature	Typically 0°C to +60°C
Weight	Varies depending on the model, ranging from a few kilograms to several kilograms. Consult specific model datasheets for precise values.
Dimensions	Varies depending on the model. Consult specific model datasheets for precise dimensions.
Materials	Stainless steel