Flowserve ISC1BX User Manual
ISC
Flow Solutions Division
ISC1BX
Single Rotating Bellows Seal
Repair Instructions
These instructions are written for trained, experienced technicians familiar with the basic
principles and tools involved in the installation, care and service of mechanical seals and seal
support systems. A complete reading of these instructions by personnel in contact with the
equipment is essential to safety. Incorrect installation, operation or maintenance can result in
personal injury or death to personnel and damage to the equipment.
1 Nomenclature
Figure 1
G
SL
6
11
M
M1
3A
34 P
1 13910A
K 13A
CT1B
Table 1
34 Bellows Assembly
3A Mating Ring
P Mating Ring O-Ring
6 Bellows O-Ring
11 Sleeve O-Ring
G Gasket
1 Gland Assembly
1B Gland Drive Ring
CT Centering Tab
K Centering Tab Cap Screw
SL Sleeve Assembly
M Vibration Dampener
M1 Bellows Vibration Dampener
10A Driver Ring
9 Sleeve Collar
13 Cup Point Set Screw
13A Quarter Dog Set Screw
Note: Primary seal O-rings (P and 6) are
the same size and cross section.
2 Disassembly
When disassembling seal, inspect for conditions which may have caused the
need for the seal to be removed from service. If seal was removed due to
premature failure, determine what conditions caused that failure and correct any
problems prior to returning the repaired seal to service. For assistance with seal
failure analysis, please contact your Flowserve representative.
Seal Parts that are always replaced
• Bellows Assembly 34
• Mating ring 3A
• All O-rings P , 6 , 11
• Gland gasket G
• Vibration dampener M
• Bellows Vibration dampener M1
• Centering tabs CT and cap screws K
• Cup point and quarter dog set screws 13 and 13A
2
© Copyright 2000 Flowserve Corporation
Reconditionable Seal Parts
• Gland assembly 1
• Sleeve assembly SL
• Sleeve collar 9
3 Inspection and Reconditioning
3.1 There are certain critical areas of each part where special attention should
be paid to the condition. If any of the areas listed in 3.2, 3.3 or 3.4 show signs
of wear, corrosion, or other defects that cannot be removed without affecting
the dimensional size of the surfaces by more than 0.001 to 0.002", then the
respective part should be replaced. If grit blasting is performed, it may be
necessary to polish the O-ring surfaces to achieve the required surface finish
(see 3.2A and 3.3A for the required surface finish). If any parts require machining to correct damage, please contact your Flowserve representative for
dimensional requirements, or for any other questions regarding repair.
3.2 Gland Assembly 1 (Figure 2)
A Mating ring O-ring surface - Inspect for wear, fretting, nicks,
scratches, or corrosion.
Required surface finish
: 63 RMS
B Gasket surface - Remove the old gasket
and clean the gasket surface. Inspect for
nicks, scratches, or corrosion.
C Pipe taps and other threaded holes -
Inspect for damaged threads or corrosion.
Taps must be clean and free of debris and
corrosion. Re-tap as necessary.
D Bushing - Inspect for wear, breakage, or
A
E
D
loosened bond with gland. Replace using
Loctite®1 7471 Primer T and Loctite RCTM/640
or equivalent to adhere the bushing if any of
these conditions exist. A ten minute cure at
B
400°F (204°C) is required to achieve full bond strength.
If worn or corroded, contact your Flowserve representative.
E Gland drive ring - Inspect for wear or corrosion, especially at
drive flat surfaces on ID of drive ring. If worn or corroded, contact
your Flowserve representative.
3.3 Sleeve Assembly SL (Figure 3)
A O-ring surfaces - Inspect for wear, nicks,
scratches, or corrosion.
finish
: 63 RMS.
Required surface
A
B Drive Ring 10A - Inspect for wear or
corrosion, especially at drive flat
surfaces on ID of drive ring.
C
C Drive end roundness -
No greater than 0.001" TIR
B
Figure 2
Figure 3
C
3.4 Sleeve Collar 9 (Figure 4)
A Threaded holes - Inspect for thread damage and
re-tap as necessary.
B ID bore roundness - No greater than 0.002" TIR
C Set screws - Replace cup point and dog point set
screws with those included with the repair kit. Make
sure the same threaded holes are used with the same
type set screws.
1 Registered Trademark of Loctite Corporation
Figure 4
A
B
3
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