Buchi V-100 - Replacing Valves

BÜCHI Labortechnik AG Cleaning and servicing | 7
Operation Manual Vacuum Pump V-100 39/52
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.