Replacing the mechanical seal
Remove the screws (Tab.7, part.1), take the wear
plate out of its seat (Tab.7, part.2), work with a
screwdriver on the grooves (Tab.8, part.2) until half of
the stationery seal (counterface) comes out of its seat
N.B
.: As for the assembly, clean the seat throughly
(Tab.8, part.1), and insert the counterface in its seat
by gentle pressure (Tab.8, part.1).
IMPORTANT!
Detail 4 protrude for 5 mm compared
to the tungsten carbide surface (part.5).
Do not install counterfaces and seal devices manually.
Use sleeves so as to avoid any contact with lapped
surface and get regular and uniform thrust. Before
assembling the parts, clean the seal and sliding
counterface faces thoroughly. Standard seal may be
used for impure water. For other liquids refer to ITT
Flygt.
11
6
Replacing the impeller
(Tab 6)
Unscrew the self-locking nut (part.18) and the impeller
(part.17) in anticlockwise direction (part.1). Lock the
shaft . Be careful because you will take out half the
mechanical seal (part.14) which must not be damaged.
While taking the seal off the impeller hub ( if the seal
itself does not need replacing) handle the rubber
bellows with care. They must not be subjected to a
torsional stress higher than that caused by the
impeller rotation on the fixed counterface.
To install the seal, follow instructions.
1) Shaft
14) Mechanical seal
17) Impeller
18) Self-locking nut
7
Part.2
Part.2
