Xylem Flygt 2190 Installation, Operation And Maintenance Manual page 50

6 Maintenance
10. Remove the O-ring.
11. Align the edge of the lower adjustment screw with the edge of the lower conical
12. Assemble the lower conical sleeve and the lower impeller onto the shaft end of the
13. Mount the suction cover with its O-ring and tighten.
14. Turn the lower adjustment screw clockwise until the lower impeller makes contact with
48
sleeve so that they are flush.
WS001759A
upper impeller.
Tightening torque: 76 Nm (57 ft-lb)
the suction cover. Tighten a further 1/6 turn, 60°.
This will ensure the correct clearance between the lower impeller and the suction
cover in the next step.
Flygt 2190, 2201 Installation, Operation, and Maintenance Manual