Dismantling The System - FLOWTECH flowboost F.V Operation And Maintenance Manual

16

Dismantling the system

Close the suction and delivery gate valves and drain the pump casing before dismantling the pump.
Dismantling the pump
Before dismantling, disconnect the power cable from the terminal box, close the gate valves in the suction
and delivery pipes and empty the pump casing (fig. 4).
For dismantling and re-assembly refer to the drawing.
Dismantling and inspection of all internal parts can be carried out without removing the pump casing from the
pipeline.
By removing the nuts from the tie bolts the motor can be taken out complete, with all internal parts of the
pump without removing the pump casing from the pipeline.
ATTENTION: to avoid compressing the spring of the mechanical seal because of axial shifting of the shaft,
we recommend to loosen the screws of the coupling even only for removing or replacing the motor.
Afterward reposition the shaft.
Remove the screws with the nuts and remove the motor from the coupling. For the 50 pumps use the
threaded holes M10 of the clamp to remove the motor
For 25-32-40:
Remove the nuts from the tie bolts.
Remove the lantern bracket, complete with bearing and coupling from the shaft and from the external jacket.
Once the lantern bracket has been removed, all the internal parts can be extracted with the shaft from the
external jacket.
Remove the upper cover with the O-ring and then the delivery casing.
For 65-80:
Remove the screws and remove the lantern bracket, complete with bearing and coupling from the upper
cover and from the shaft (fig.5a).
Remove the nuts and washers from the tie bolts.
Remove the upper cover from the shaft and from the external jacket - or with the external jacket from the
pump casing - with the aid of a mallet or lever, exercising pressure in alternate operations, from diametrically
opposite positions.
Once the upper cover has been removed, all the internal parts can be extracted from the pump casing.
For 50-15 and 50-20:
Remove the screws and remove the pump flange whit the bearing and the coupling (for pump whit motor
upper than 4 kW remove the coupling) from the lantern bracket and from shaft (fig.5b).
For removing the cartridge seal remove the screws and screwed up the screws to the cover plate for seal.
Remove the nuts from the tie bolts.
Remove the lantern bracket from the shaft and from the external jacket with the aid of a mallet or lever,
exercising pressure in alternate operations, from diametrically opposite positions. Once the upper cover has
been removed, all the internal parts can be extracted from the external jacket.