Masdaf NMM Series, Руководство по эксплуатации

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KYP Serisi
12
10.1. Disassembly
• Close all valves in the suction and discharge lines,
drain the pump.
• Remove guard.
• Thanks to “Back Pull Out Design”; the impeller, shaft
and other rotating parts being removable no need to
disconnect the suction and delivery pipes.
• If to take out the complete pump is necessary,
disconnect pump from the driver, suction and discharge
pipes and detach the base plate.
• Dismantle the rotor groupwith motor from the
volute casing (Be careful to keep the stuffing box cover
in place to avoid any mechanical seal trouble).
• Unscrew the impeller end nut (65) and take out the
impeller (20) and impeller key (210). Use rust remover
solvent during dismountling if necessary.
• Take out the set screws on the pump shaft. Take off
the motor by unscrew the hex bolts (320)
• Pull out the rotating part of the mechanical seal
(250).
• Take out the shaft.
10.2. Reassembly
• Reassembly proceeds in reverse sequence to
disassembly as described in section 10.1. You may find
the attached drawings useful.
• Coat the seats and screw connections with graphite,
silicon or similar slippery substance before reassembly.
If you can not find any of the above you may use oil
instead (except the pumps for drinking water).
• Never use the old gaskets, make sure the new
gaskets and o-rings are the same size as the old ones.
• Slip the pump shaft (60) onto the motor shaft, fix the
set screws.
• Place the stationary part of mechanical seal to its
place on the adaptor (12)
• Mountthe adaptor to the motor flange.
• Place the impeller key (210) into keyway, slide the
impeller (20) onto the shaft (61) and screw the impeller
nuts (65).
• Now reassembly of the rotor group is complated.
• Finally mount rotor assembly to the volute casing. (In
the repair shop or on site.)
• Make sure the gaskets and o-rings are evenly placed
without sliding and not damaged or not squezed at all.
• Place the pump on the baseplate, couple the motor.
Connect suction and discharge pipes as well as auxiliary
pipes. Take the unit into operation as it was indicated in
section 7.
• Put the stationary part of mechanical seal in its place
on the seal cover (58-59). Then put this part on the
shaft. Afterwards put the rotating part of mechanical
seal on its position.
• Mount stuffing box (03) to bearing housing (30).
• At this stage you can insert the irrigation ring.
• Replace impeller key and pump impellers. Tighten
the impeller nuts.
• Replace the coupling and coupling key.
• Tighten mechanical seal cover.
• Now reassembly of the rotor group is completed.
• Finally mount rotor assembly to the volute casing. (In
the repair shop or on site.)