WK
Fig. 81 Shaft with first stage impeller
3.
Insert shaft (210) together with spacer sleeve (525.1) and
impeller (230) into discharge casing (106) (see Fig. 82).
Fig. 82 Shaft with first stage impeller inserted into suction
casing
Fig. 83 Mounting the impeller
4.
Mount stage casing (108) together with inserted diffuser
(171.1) and flat gasket (400.2), and slip stage sleeve (521)
onto the shaft (see Fig. 84).
5.
Mount all the following stages in similar fashion each stage
consists of stage casing 9108), diffuser (171.1), casing
wearing ring (502), flat gasket (400.2), impeller (230), key
and stage sleeve (521). Underpin the stage casings (108)
in turn after assembly (see Fig. 84).
Fig. 84 Mounting the stage casings
6.
After assembly of each individual stage, check the total
axial clearance ‘‘Sa 1 + Sa 2’’ of the pump rotor (approx.
6 mm. see Fig. 85).
7.
Mount discharge casing (107) with inserted last stage
diffuser (171.2) and O-ring (412.2) (see Fig. 86).
Fig. 86 Inserting the diffuser in the discharge casing
Fig. 85 Checking the total axial clearance.
Sa2
Sa1
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