Flowserve ISC1PX User Manual
Experience In Motion
ISC
ISC1PX
Single Pusher Seal
Repair
Instructions
These instructions are written for trained, experienced technicians familiar with the basic
19 183 1
100
24 40
57.1
103
18 76 2 15 14
13.1
13 16
58
5711
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
Note: Primary seal O-rings (13, 13.1,76) are
all the same size and cross section.
Table 1
14 Stationary Face
15 Rotating Face
16 Springs
100 Stator Face Support
13 Dynamic (seat gasket)
13.1 Stator (seat gasket)
76 Rotating Face Gasket
18 Gland Gasket
11 Gland Assembly
24 Gland Bushing
103 Setting Device
40 Cap Screw
1 Sleeve Assembly
2 Seal Drive
183 Vibration Dampener
58 Drive Collar
57 Cup Point Set Screw
57.1 Quarter Dog Set Screw
19 Sleeve Gasket
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
• Stationary Face 14
• Rotating Face 15
• Springs 16
• Stator Face Support 100
• All O-rings 13 , 13.1 , 76 , 19
• Gland gasket 18
• Vibration dampener 183
• Setting Devices 103 and cap screws 40
• Cup point and quarter dog set screws 57 and 57.1
• Gland Bushing 24
2
Reconditionable Seal Parts
• Gland assembly 11
• Sleeve assembly 1
• Drive collar 58
• Seal Drive 2
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 nish (see 3.2A and 3.3A for the required surface nish). 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 11 (Figure 2)
A Dynamic O-ring surface - Inspect for wear,
fretting, nicks, scratches, or corrosion.
Required surface nish: 32 RMS
B Gasket surface - Remove the old gasket
and clean the gasket surface. Inspect for
nicks, scratches, or corrosion.
E
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
A
D Bushing - Inspect for wear, breakage, or
loosened bond with gland. Replace using
B
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 400°F (204°C) is required to achieve full bond strength.
E Anti-rotation pins - Inspect for wear or corrosion. If worn or corroded,
contact your Flowserve representative.
3.3 Sleeve Assembly 1 (Figure 3)
A O-ring surfaces - Inspect for wear,
nicks, scratches, or corrosion.
Required surface nish: 63 RMS.
A
B
B Seal Drive 2 - Inspect for wear or
corrosion, especially at drive at
surfaces on ID of drive ring.
C
C Drive end roundness -
No greater than 0.001" TIR
3.4 Drive Collar 58 (Figure 4)
A Threaded holes - Inspect for thread damage and
A
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 2
C
Figure 3
Figure 4
B
3
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