Cleaning and maintenance
20901118_EN-US_PC301x VARIO select Serie_V1.3_100720
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9. Place the new valves on
top and align them.
Plan view cutout: Correct position-
ing of valves.
IN = inlet
EX = exhaust (outlet)
-> Example
Valve replacement
10. Place both valve terminals
with the disc springs on
the pump heads.
11. Place the clamping claws
on the valve terminals and
tighten the screw fittings
first by hand, then with a
torque wrench to 3 Nm.
12. Carefully press the di-
aphragms centrally into
the housing opening, en-
suring they are flush with
it.
13. Hold the pump head pair
at the vacuum pump and
wind in the screw fittings;
hex key size 5.
