CAL Optional Design
- 18-
Unit: mm
Unit: mm
LCA
φ
d F/E
LA200-RF
φ
d
LA200-RE
φ
d
LA200-RK
φ
d
L9SA-RE
φ
d
L9SA-RK
φ
d
Shaft size
d
A
A
A
25-360
24
49.5
51.5
49.5
35-470
45-470
45-470A
55-530
65-530
55
49.5
56.5
54.5
54
60
Mechanical seal type
32
45
47
56.5
56
63
Fig 5.2-10 External flushing
5.3. Causes leakage from mechanical seal
(1)
When the life period expires.
(2)
When the construction materials of mechanical seal are
abnormally eroded.
The construction materials are carefully selected pursuant
to the specifications which were submitted in ordering.
When placing an order, therefore, submit the information
on the precise properties of intended pumped liquid and
other data. In addition, let us have the changed content of
the specifications, if any.
(3)
In case of leakage caused by slurry, dust and scale:
Inclusion of dust and scale in pumped liquid will accelerate
wear of the sliding surface and interfere with follow ability
of washer (4720) by adhesion of dust and scale to packing
(4100) or spring (4770). Finally such a phenomenon will
cause leak trouble. In such a case, adequately clean the
internal components and each pipeline.
(4)
Imperfect installation, centering and piping connection.
Improper installation, centering and piping of the pump cause
abnormal vibration of the pump, and contact between the rotor
and the stator, resulting in leakage from the mechanical seal,
damage to the bearing and other troubles. Fully considering the
above, perform installation, centering and leveling, piping
connection, etc. in strict compliance with this Manual.
(5)
Occasionally incorrect handling and operation, if any, will
cause leakage from the mechanical seal.
For correct pump handling and operation, refer to Section 2
(P.6).
5.4. Disassembling
Refer to Subsection 4.2 (P.12) for the pump disassembling
sequence.
5.4.1. Disassembling procedure and precautions
Refer to the disassembling procedure for the type of the mechanical
seal being used.
[A] Single mechanical seal (Type: CA)
(1)
After completion of the disassembling steps 4.2(1)
～
4.2(8)
(P.12), pull the rotating side mechanical seal set {washer
(4720), packing (4100), follower (4740), spring (4770),
stopper (4850)} out of shaft (2100).
(2)
After removing the casing cover (1610), remove the seat
(4750) and the cushion ring (4101) from the casing cover.
When removing the casing cover, use caution so as not to
break the seat (4750), and not to damage the internal
surface of the seat by hitting it against the shaft (2100).
Seat is only fitted in casing cover through cushion ring. So,
it can be pulled out by the both hands.
[B] Single mechanical seal (Type: LCA, LA200,
L9SA, MBS100)
(1)
After completion of the disassembling steps (P.12) of 4.2
(1) through 4.2 (8), loosen the seal cover mounting nut, and
slide the seal cover toward the bearing housing (3300). In
this step, use caution so as not to break the seat (4750), and
not to damage the internal surface of the seat by hitting it
against the shaft (2100).
(2)
Remove the casing cover (1610).
(3)
Remove the set bolt (9040) from the stopper (4850), and
pull out the mechanical seal on the rotary side from the
shaft (2100).
(4)
The seat has been simply inserted in the seal cover with the
O-ring (4120.1). It can be removed by pulling it out
forcedly with both hands.
[C] Double mechanical seal (LTW type)
(1)
After the 4.2 (1) to 4.2 (8) disassembling steps (P.12) are
completed, loosen the seal cover (4710) mounting nut, and
slide the seal cover (4710) to the bearing housing (3300)
side. In this step, use caution so as not to break the seat
(4750.1), and not to damage the internal surface of the seat
by hitting it against the shaft (2100).
(2)
Remove the casing cover (1610).
When removing the casing cover, use caution so as not to
break the seat (4750.2), and not to damage the internal
surface of the seat by hitting it against the shaft.
(3)
Remove the set bolt (9040) from the stopper (4850), and
pull out the mechanical seal on the rotary side from the
shaft (2100).
