23
6.2
Removal and Assembly of the Pump Heads,
Valve Heads and Diaphragms
Under conditions of normal usage, the diaphragms and the
valve plates will rarely require replacement.
If the benchmarks of the function checkup (6.1) are not met,
the pump heads, diaphragms, and valve heads should be
cleaned.
If the pump’s performance does not improve, the valve heads
(38025) and possibly the diaphragms must be replaced
(Spare Parts Set 38120).
Attention: Before replacing the diaphragms, please disconnect
the apparatus from the power source.
The parts of the pump head are delicate. Pay close attention
to ensure that the glass head, the valve head, and the dia-
phragms are not subjected to mechanical damage. Before
assembly, the parts must be examined for nicks, chips, or
deformation.
BÜCHI
Vac
V-500/V-501/V-502/V-503
6 Maintenance
