BÜCHI Labortechnik AG
Cleaning and servicing | 7
Operation Manual Vacuum Pump V-100
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7.2.4
Replacing valve
1
5
1
1
2
3
4
3
2
Fig. 24: Dismantling the pump head
1 O-rings
4 Elbow connection
2 Non-return valves
5 Straight connection
3 Screws for connections
u
Remove the pump head (see Chapter 7.2.2 "Dismantling and reassembling pump
head", page 35).
u
Unscrew the screws (3) from the connections (4, 5).
u
Remove the elbow connection and the straight connection from the pump head.
u
Remove the O-rings (1) and the non-return valves (2) from inside the connections.
u
Insert new O-rings and valves into the connections.
NOTICE! When inserting the
non-return valves, pay attention to the airflow direction: the air enters on the
funnel-shaped side of the non-return valve. See also the schematic diagram
on the inside of the housing above the pump intake and pump outlet.
u
Refit the connections to the pump head.
