Flowserve PVML - Manual (Page 24)

PVML USER INSTRUCTIONS ENGLISH 00079591 – 01/05
®
6.9.8
Fitting the diffuser
This procedure describes assembly of the diffuser into
the casing cover.
Clean the surfaces of the diffuser and the casing
cover.
Place the diffuser [1410] on the casing cover.
Make sure that the centring rim is not damaged.
Mount the hexagon head bolts [6577.1] with lock
washers [6541].
Lock the hexagon head screws [6577.1] against
the diffuser using the lock washers [6541].
6.9.9 Fitting the back pull out unit
This procedure describes assembly of the 'back pull
out' unit to the pump casing.
Clean the supporting surfaces of the casing cover
and the pump casing.
Clean internally machined surfaces which come
into contact with liquid and surfaces where there
is only a narrow gap between them and other
finished surfaces. Treat these surfaces with e.g.
Molykote G (spray or paste).
Place a new packing ring [4590.2] onto the rim of
the pump casing.
Attach lifting devices at the appropriate lifting
points. Observe the lifting instructions described in
section 2.3.
The lifting lugs fixed to the motor
are sufficient to lift the motor, but are not suitable
to lift the total unit.
Lift the casing cover above the pump casing and
make sure that the casing cover is in the correct
position in relation to the pump casing. There is
only one way for the casing cover to fit onto the
pump casing.
Carefully place the casing cover on the pump
casing. Work carefully as there is little clearance
between the diffuser and the pump casing. Also
make sure that the centering rim of the casing
cover is not damaged.
Tighten the nuts [6581.1] evenly across the casing
cover by applying the prescribed tightening torque
in accordance with table per section 6.5.
6.9.10 Fitting other parts
Clean the supporting surfaces of the casing cover
and the pump casing.
Connect all auxiliary pipes in accordance with
the dimensioned drawing, the “Process and
Instrumentation Diagram” (P&ID) or the
“Auxiliary Piping Arrangement Drawing”.
Reconnect the electric motor in accordance
with the instructions for use provided by the
relevant supplier.
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