Argal ZMR 02.30, Use Manual

Page: 9 / 20

9
- proceed with opening of the pump according to sequence described on paragraph no. 1.1 in the column of the LEGEND
-
the access to the mech. Seal is possible only after dismantling of the impeller (remove ogive and take the impeller off)
:removing the rotating part of the mechanical seal from the impeller you can reach the fixed part of the seal.
the motor can be separated from strainer unscrewing the 4 bolts that fix the strainer itself to it ; than open the cone cou pling
by friction and take off the shaft of the pump from motor shaft.
8.2
INSPECTION
Check:
-
excessive wear of seal rings
- counterthrust bushing for cracks or excessive wear
- for lumps and clusters created by the pumped liquid (especially at the bottom of the rear chamber)
- the impeller, volute and intermediate disk for abrasion and corrosion
- for infiltration of liquid outside the seal in the support
Replace broken, cracked or deformed parts.
Reopen all the blocked pipes and eliminate any chemical agglomeration.
Clean all surfaces before reassembly; in particular seal rings (risk of leakage or premature wear) and O-ring seats (risk of
leakage).
8.3 ASSEMBLY
Tools required: No.6 socket spanner, No.10 socket spanner, No.13 socket spanner, No.17 socket spanner, No.19 socket
spanner, screw driver CH6(Hex drive type), screw driver (Phillips drive type). The nuts and bolts have a right-hand thread
Bolt torque setting: M4 M6 M8 M10 M12 M16 M20 M24
(reduce by 25% on plastic parts) Nm 4 14 24 48 60 75 120 175
- all the tasks must be performed under supervision of qualified personnel
- seal with new o-rings
- assemble the pump by following the procedure set out in the LEGEND column in the
reverse order
- clean out the motor shaft from any trace of dust and/or grease
- mount the pump shaft (pos.11) complete with cone capling element (pos.13) and
seager ring (pos.47)
– fig.8.1
- Lock up the screws of cone capling element to block off the pump shaft to the motor
-
Assemble the strainer (pos.15) together with the motor flange (pos. 15.A)
- Install the strainer assembly (strainer + flange) on the motor taking care to place the
components as indicated in fig. 8.2
Installation of mechanical seals SF..
– TS..
Assemble the parts in the following order ( fig. 8.3 )
1) Dividing plate (pos. 46 )
2) Spacer ( pos. 25 or pos. 27 )
3) O ring Impeller ( pos. 51 ) , care for installation in the foreseen round
slot in the spacer.
Installation of mechanical seals MSF..
– MTS.. ( fig. 8.3 )
1) Insert the fixed seal ring ( pos. 31 ) in the foreseen dividing plate slot
( pos. 46 )
2) Assemble the rotating seal ( pos. 30 ) and the spacer pos. ( 25 )
3) Position the dividing plate complete with the fix seal in the strainer.
4) Install on the shaft the spacer complete with rotating seal
5) Assemble the o ring impeller ( pos. 51 ) in the slot of the spacer.
Position the mechanical seal chamber ( pos. 54 ) complete with O rings ( pos
52, pos. 53 ) and nipples ( pos. 55 ) and fluxing connection
Fig.8.1
Fig.8.2
Fig.8.3
Fig.8.4