Knauer K-120 Handbuch Seite 21

Maintenance by the user
Fig. 11
.
flow direction
Check valve, single parts
5. Assemble the check valves in reverse order. Be sure to that
the glossy side of the seating is facing the valve ball, see
Fig. 11 and assemble the check valve properly. Wrong
assembly can lead to damage and leakage of the check
valve.
6. Put the check valves considering the flow direction into the
bushing holes 3.5 and 3.6. Screw in the bushings by hand.
Tighten the bushings carefully with a spanner by about ½ -
¾ turns.
To avoid destruction of the ceramics tighten the screws of the
ceramic gasket holder (item 3.5 and 3.6) with 8 Nm using a
torque wrench.
outer view
housing
transparent
valve seal
seating (glossy side)
ball guide
valve ball
seating (lustreless side)
90° turned
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