Single-Flushed Shaft Seal
Assembly {cont.)
11. Fit lip seal (38) in seal housing (35) obser
ving the direction of the lip. The lip seal
must be facing the internal portion of the
seal housing. Press the lip seal and knock
into position by using a suitable tool, e.g. a
piece of pipe, of proper diameter. Be care
tu I not to damage the lip seal.
12. Mount seal housing (35) with O-ring (39) on
the back plate and fasten screws (36).
Note:
One of the flushing liquid connections
should point downwards (see fig.)
13. Fit O-ring (40) in drive ring (7). Mount drive
ring on the stub shaft so that drive pin (5)
on the shaft enters the notch in the drive
ring.
14. Fit O-ring (12) in the rotating seal ring (11)
as far away as possible from the seal face,
and fit this in spring (10).
Assembly And Disassembly
17. Fit back plate (21) with seal housing and
stationary seal ring on adapter (13). Be ca
reful when the lip seal is pushed over the
shaft on which the other seal parts are
mounted.
Note:
Be very careful that the driver on the
driving ring enters the notch in the rota
ting seal ring.
18. Secure with washers (17) and nuts (16).
Tighten.
19. Screw impeller (33) onto stub shaft. Fit im
peller retaining bolt (32), if used.
Remember to install O-ring (34) into O-ring
groove on the face of the impeller (33).
20. Install safety shield over adaptor ( 13) using
thumb screw.
21. Fit O-ring (22) on back plate.
15. Mount spring and rotating seal ring on the 22. Fit pump casing (25) on back plate and
drive ring.
hand tighten wing nuts (20) finger tight so
16. Prefit the rotating seal ring with spring into
place so that the driver on the drive ring is
loacated in the notch in the rotating seal.
Release this assembly carefully so that
alignment is maintained.
Note:
The notch in the rotating seal ring must
be exactly opposite to the driver on the
drive ring. Otherwise, the seal ring may
break during the continued assembly.
that there is metal-to-metal contact be
tween casing and back plate.
23. Fit and tighten tubes (37).
Note:
Connect the flushing liquid inlet to the
lower connection.
14
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