22
Pump head repair
Fig. 22
Exchange the ball valves
Clean ball valves
1. Put the valve in a beaker with rinsing solvent, for example iso-
propanol or methanol.
2. Put the beaker with valve in an ultrasonic bath for at least
10 minutes.
Installing the ball valves
1. Insert both ball valves.
1. Screw in the outlet fitting 1 (C) and tighten to 15 Nm with
a torque wrench.
2. Screw in the inlet fitting 1 (E) and tighten to 15 Nm with
a torque wrench.
3. Screw in the inlet fitting 2 (A) and capillary fitting (B) and tigh-
ten with a wrench.
Legend
A
Inlet screw fitting 2
B
Capillary screw fitting
C
Outlet screw fitting 1
D
Ball valve
E
Inlet screw fitting 1
B
C
D
E
A
