installation &
operating instructions
Design Envelope 4300 & 4380 Vertical
In-line pumping unit with ivs drive
53
Otherwise elastomer swelling may occur, causing seal failure.
Recommended: International Products Corp p-80 Rubber
Lubricant Emulsion in usa & uk www.ipcol.com
caution
The permissible tds levels are :
a SSiC Vs C – 2000ppm max
b SSiC Vs SSiC – 4000ppm max
In case the water exceeds permissible tds levels, corrosion
or fouling may occur resulting in seal failures. It is necessary
to maintain the water quality with proper water treatment
program.
Seal Removal
An important feature of the Series 4300 and 4302 pump is
that the design permits removal of the mechanical seal with-
out disturbing the pump, motor or electrical wiring.
a
Disconnect the power supply at the main switch and close
the isolating valves on the suction and discharge. Empty
casing by removing drain plug(s) located at the bottom.
b Loosen o the seal collar set screws (1) Remove the
coupling screws (2) and separate the coupling halves
(3). Remove the motor shaft key (4) and the pump shaft
key (6). Do not remove motor collar (5) for seal replace-
ment. Use Allan wrench and insert coupling screw into
positioning hole (21) to prevent shaft rotation and remove
the capscrew, lockwasher and collar (17, 16, & 18) from the
pump shaft.
c Remove the mechanical seal rotating assembly (8)
through the gap between the pump and motor shafts.
d Disconnect the seal flush piping (10a). Mark seal plate
(10) position. Remove the seal plate bolts (9) and seal
plate (10). Remove the stationary seat (11) and seat
gaskets (13 & 14).
Seal Replacement
Handle mechanical seal carefully to protect seal faces from
damage. Do not contaminate seal faces with finger prints.
e Replace the stationary seat (11) and gaskets (13 &
14), aligning the seat flush hole with the seal plate
flush line connection. Ensure the large diameter gas-
ket (14) is on the bottom. Replace seal plate (10) and
tighten the seal plate bolts (9) evenly and diagonally,
to the following torque (ft. lbs) values: 1.125" seal – 20;
1.625"/2.125"/2.625" (7.5" diameter plate) – 50; 2.625 (9"
diameter) – 90; 3.5" – 90.
f When installing the mechanical seal (8), ensure parts are
perfectly clean.
g Apply a small amount of temporary rubber lubricant
emulsion to the o-ring (15). Carefully slide the mechanical
seal rotating assembly (8) down the shaft onto the sta-
tionary seat (11). Do not tighten the set screws (1) on the
side of the mechanical seal yet. Do not remove holding
clips (12).
h Use Allan wrench and insert the coupling screw into
positioning hole (21) to prevent pump shaft rotation and
replace collar, lockwasher, and capscrew (18, 16, & 17).
Capscrew (17) must be firmly tightened on the pump
shaft with a wrench.
i Fit the motor shaft key (4) and the pump shaft key (6)
then install the keyed coupling half (3) first.
note:
For easier coupling installation, motor and pump shaft
keys (4 & 6) should be 180 degrees from the working area.
To automatically locate the impeller in the pump, insert
the coupling screw Allan wrench into positioning hole (21)
and lift pump shaft until the pump shaft collar is posi-
tioned in the coupling groove, then rotate shaft to locate
the pump shaft key (6) into blind keyway in coupling.
Should the pump rotating assembly prove too heavy to
lift easily: a piece of 2" × 4" wood may be firmly posi-
tioned to allow a pry-bar to be placed securely under the
pump shaft collar; the rotating assembly may be levered
and raised-up in that manner.
j Place the second coupling half into position and tighten
the coupling screws (2) following the tightening pattern
shown on the illustration(1 2 3 4 5 6).
note:
Snug fit the coupling screws and confirm even gap spac-
ing between coupling halves, then firmly tighten cou-
pling screws following the tightening pattern illustrated.
Then push (or slide) mechanical seal (8) firmly onto the
stationary seat (11) and tighten the set screws (1) to the
following torque (ft. lbs) values: Seal sizes 1.125" to 2.625"
– 5; 3.5" – 11. Remove the holding clips (12) for operation.
The mechanical seal is now preset at the correct working
length.
k Replace the seal flush piping (10a) and drain plug(s). Se-
ries 4302: Equalize pump pressure within dualArm pump
by temporarily opening valve on connecting tubing. Open
all isolating valves prior to operating pump(s). Reconnect
power supply.
If motor is replaced: Loosen set screws (7) on motor shaft
collar (5) and remove from old motor shaft. To position the
collar (5) correctly on the new motor shaft, temporarily fit
motor shaft collar (5) into groove of the keyed coupling half.
Slide collar, with coupling half onto new motor shaft until
end of shaft lines up with line scored into coupling. Tighten
the visible set screws (7) in the collar (5) enough to hold
the collar in place on the shaft and remove the coupling
half. Tighten all collar set screws (7) evenly and diagonally.
Order replacement motors with locked lower bearing.
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