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-> Example
Pump head mainte-
nance
Description
20901367_EN-US_PC3001 VARIO select Serie_V1.3_100720
7.2.4 Clean or replace PTFE hoses
Maintenance provides the opportunity to check the components
of the pumping unit, including the hoses.
ð Clean the inside of very dirty molded hoses, e.g., using a
pipe cleaner or similar.
ð Replace brittle and defective molded hoses.
7.3 Vacuum pump maintenance
7.3.1 Maintenance items
Positions to be maintained
Maintenance items
1 Housing cover, power supply side
2 Housing cover with gas ballast
ð Perform maintenance on the pump heads one after the
other.
ð Always replace all diaphragms and valves of the pump
heads as described in the graphic description for pump
head (1).
Straightforward maintenance due to split work steps.
ð On one pump head pair, first replace the diaphragms.
ð Then change the inlet/outlet valves.
ð Then repeat these steps for the next pump head.
Cleaning and maintenance
59
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