9
F2- Reassembly
Reassembly proceeds in reverse sequence to disassembly as described in section F1. You may find the
attached drawings useful (see sectional drawing in section M).
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 o-rings and make sure the o-rings are the same size as the old ones.
Fig. 8.
F3- Shaft Seal
SNL type pumps are with mechanical shaft seals.
When operating properly the mechanical seal has no visible leakage. Usually mechanical seals do not require
maintenance until leakage is visible but its tightness is to be checked regularly.
A- For Motor Frame Size up to 200 (See section M1)
Make the alignment of the pump shaft's location to
provide the length as per the length
"S"
given in
section
K.
("S" is the distance between the shaft shoulder and
the end of the mechanical seal chamber.
(See Fig. 8).
Tighten the set-screws (for the shaft consists of 3 set-
screws starting from the one in the middle and if or the
shaft consists of 2 set-screws start from the one near the
motor).
Place the stationary part of the mechanical seal into
the seal chamber.
Slip the rotating part of the mechanical seal onto the pump shaft (060) and place the spacer sleeve (067).
Place the impeller key (210) into keyway, slide the impeller (050) onto the shaft (060) and screw the impeller
nuts (065).
Assemble the volute casing (001).
Mouth the base plate (011) to the pump (if used).
B- For Motor Frame Size Above 200 (See section M2)
Place the motor (600) vertical as the shaft end comes to the upper side.
Slip the rigid coupling (085) onto the motor shaft (060) put the washer (370)
on the rigid coupling (085) and tighten by using imbus head bolt (340). So that
the shaft end and the coupling end will be on the same plane
(see Fig. 9).
Tighten the set-screw (380) over the rigid coupling (085).
Mount the pump shaft (060) to the rigid coupling (085).
Place the stuffing box cover (046) onto the motor pedestal (012).
Place the stationary part of the mechanical seal into the seal chamber.
Slip the rotating part of the mechanical seal onto the pump shaft (060) and
place the spacer sleeve (067).
Place the impeller key (210) into keyway, slide the impeller (050) onto the
shaft (060) and screw the impeller nuts (065).
Assemble the volute casing (001).
Mouth the base plate (011) to the pump (if used).
Place the motor (600) vertical as the shaft end comes to the upper side.
Assemble the motor pedestal (012) to the motor (600).
Slip the pump shaft (060) onto the motor shaft.
Place the stuffing box cover (046) onto the motor pedestal (012)
Casing Cover (046)
Pump Shaft (060)
Motor Shaft (600)
Set-Screw (380)
Motor Shaft (600)
Rigid Coupling (085)
Set-Screw (380)
Washer (370)
Allen Bolt (340)
S
Fig. 9.
80-400
100-400
125-315
125-400
150-315
150-400
65-250
80-250
100-250
Motor Frame size IEC 250 and up 2 poles
(2900 rpm or 3500 rpm) Motor Pumps
Motor Frame size IEC 200 and up 4 poles
(1450 rpm or 1750 rpm) Motor Pumps
