Flowserve ISC2PP User Manual

ISC
Flow Solutions Division
ISC2PP Dual Pusher 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
Table 1
SL 6A P3
11 10A
M1
3 Outboard Stator
3A Inboard Stator
3B Outboard Mating Ring
3C Inboard Mating Ring
C Outboard Springs
C1 Inboard Springs
SC Outboard Stator Carrier
SC1 Inboard Stator Carrier
P Outboard Dynamic O-ring
P1 Inboard Dynamic O-ring
P2 Outboard Stator O-ring
P3 Inboard Stator O-ring
6 Outboard Mating Ring O-ring
6A Inboard Mating Ring O-ring
G Gasket
G1 Inner Gland O-ring
SC1
P1
C1
3C 3A
RR M
1CP
13 9
3B KCT13AB
11A
SCP26141B
3
G
G1
- Inboard mating ring (3C) is interchangeable with outboard mating ring (3B).
- Inboard stator carrier (SC1) is interchangeable with outboard stator carrier (SC).
- Primary seal O-rings (P, P1, P2, P3, 6, 6A) are all the same size and cross section.
1 Gland Assembly
B Carbon Bushing
1B Inner Gland
14 Rotor Carrier
RR Retaining Ring
CT Centering Tab
K Centering Tab Cap Screw
SL Sleeve Assembly
10A Drive Ring
M Outboard Vibration Dampner
M1 Inboard Vibration Dampner
9 Sleeve Collar
13 Cup Point Set Screw
13A Quarter Dog Set Screw
11 Shaft O-ring
11A Rotor Carrier O-ring
2
© Copyright 2000 Flowserve Corporation
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
• Inboard and outboard stators 3 and 3A
• Inboard and outboard mating rings 3B and 3C
• Springs C and C1
• Inboard and outboard stator carriers SC and SC1
• All O-rings P , P1 , P2 , P3 , 6 , 6A , G1 , 11 , 11A
• Gland gasket G
• Vibration dampeners M and M1
• Retaining ring RR
• Centering tabs CT and cap screws K
• Cup point and quarter dog set screws 13 and 13A
Reconditionable Seal Parts
• Gland assembly 1
• Sleeve assembly SL
• Inner gland 1B
• Rotor carrier 14
• 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 Dynamic O-ring surface - Inspect for wear,
fretting, nicks, scratches, or corrosion.
Required surface finish
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
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 400°F (204°C) is required to achieve full bond strength. If worn or corroded, contact your Flowserve representative.
1 Registered Trademark of Loctite Corporation
: 32 RMS
B
E
D
A
Figure 2
C
3
3.3 Sleeve Assembly SL (Figure 3)
A O-ring surfaces - Inspect for wear,
nicks, scratches, or corrosion.
Required surface finish
B Drive Ring 10A - Inspect for
wear or corrosion, especially at drive flat surfaces on ID of drive ring.
C Drive flats for rotor
carrier - Inspect for wear, rounding of edges of flats, or corrosion.
D Drive end roundness
: 63 RMS.
No greater than
0.001" TIR
3.4 Inner Gland 1B (Figure 4)
A Dynamic O-ring surface - Inspect
for wear, fretting, nicks, scratches, or corrosion.
finish:
B Gland O-ring surface - Inspect
for wear, nicks, scratches, or corrosion.
finish:
63 RMS.
C Gasket surface - Remove
old gasket and clean surface. Inspect for nicks, scratches, or corrosion.
D Anti-rotation pins - Inspect for
wear or corrosion. If worn or corroded, contact your Flowserve representative.
Required surface
32 RMS
Required surface
Figure 3
B
C
A
D
Figure 4
C
D
A
B
3.5 Rotor Carrier 14 (Figure 5)
A O-ring surfaces - Inspect for
wear, nicks, scratches, or corrosion.
surface finish
B Pumping vanes - Inspect for
wear, damage, or corrosion.
C Drive flats - Inspect for wear
or corrosion.
4
Required
: 63 RMS.
Figure 5
A
B
C
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