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
3.6 Sleeve Collar 9 (Figure 6)
A Threaded holes - Inspect for thread
damage and re-tap as necessary.
B ID bore roundness -
no greater than
A
0.002" TIR
Figure 6
C Set screws - Replace cup point and dog point set
screws with those included with the repair kit.
B
Make sure the same threaded holes are used with the same type set screws.
4 Seal Assembly Instructions
4.1 Tools Required
•3/32", 1/8" hex key wrenches (Sizes < 2.625"); 1/8", 3/16" hex key
wrenches (Sizes 2.625" and larger)
Silicone grease (included in repair kit)
Ethyl alcohol or acetone and clean, lint free towel for cleaning seal faces
4.2 As part of the assembly of the seal, there are several blind fits of pins and drive flats. It may be helpful to mark the locations of the pins or drive flats with a felt tip marker, or to align the feature with another visible feature on the seal to assist with assembly. All seal faces should be cleaned with alcohol or acetone prior to placing the faces together at each respective step in the assembly process.
4.3 Arrange O-rings by diametri­cal size. There are four sizes total: quantity 1 of the largest size O-ring G1 , quantity six of the 2
nd
largest size O-rings P P1 P2 P3 6 and 6A , quantity one of the 2nd small­est size O-ring 11A and quantity 1 of the smallest size O-ring 11 . Prior to installing each O-ring at its respective step, lightly lubricate with silicone grease and stretch slightly.
Figure 7
4.4 Place the sleeve assembly SL on a flat surface with the collar end facing up. Install the inboard vibration dampener M1 into the sleeve end housing. Place the inboard mating ring O-ring 6A in the sleeve O-ring groove behind the surface with drive flats in the sleeve. (Figure 7)
O-ring
6
Vibration
Dampener
M
5
Mating
Ring
3A
Drive Flats
4.5 Align the two flats on the inboard mating ring 3C with the two flats on the inside of the drive ring 10A in the sleeve end housing, and press the mating ring into place using finger pressure only. (Figure 8)
Figure 8
Drive
Ring
10A
Figure 9
O-ring
P3
Stator
3A
4.6 Place the inboard stator O-ring P3 on the O-ring surface of the inboard stator 3A , which is the smallest outside diameter. Place stator face down on a clean, flat surface. (Figure 9)
4.7 Align the stator drive pins in stator carrier SC with the drive slots in the stator and press the stator carrier in place using finger pressure only. (Figure 10)
4.8 Install the springs C in holes of stator carrier.
6
Figure 10
Align Pin with Slot
Stator
Carrier
SC
Stator
3
Spring
Locations
4.9 Place the stator and stator carrier assembly face down onto the sleeve/mating ring assembly. (Figure 11)
4.10 Place the inboard dynamic O-ring P1 in the dynamic O-ring surface of the inner gland. (Figure 12) Align the inner gland drive pins with the slots in the outside diam­eter of the stator carrier and press the inner gland onto the stator carrier, using even hand pressure. (Figure 13) Caution: do not rotate the inner gland to align the pins while pressing down. This could damage the springs. Once the inner gland is in the proper position, do not rotate it until the seal is fully assem­bled to ensure that the pins remain aligned.
Figure 11
Stator
Carrier
Assembly
Sleeve/Mating
Ring Assembly
O-Ring
P1
Figure 12
Figure 13
Drive
Pins
Slots
7
4.11 Place the inner gland O-ring G1 into the face groove in the inner gland. (Figure 14)
4.12 Place the rotor carrier O-ring 11A in the smallest diameter groove of the rotor carrier 14 (Figure 15)
Figure 15
Figure 14
4.13 Align the three drive flats on the rotor carrier with the drive flats on the sleeve and press the rotor carrier on the sleeve with the pumping vanes face up. (Figure 16)
Figure 16
Sleeve
Rotor Carrier
Drive Flats
Retaining
Ring
Groove
Retaining Ring RR
Drive Flats
Figure 17
4.14 Insert the retaining ring RR into the groove in the sleeve assembly while pressing down on the rotor carrier. Make sure that the retaining ring snaps completely into the groove in the sleeve assembly. (Figure 17)
8
O-ring
6
O-ring
P
Figure 18
Vibration Dampner
M
Figure 19
4.15 Insert the outboard vibration dampener M into the rotor carrier. Makesure that the vibration dampener is fully seated at the bottom of the rotor carrier. Place the out­board mating ring O-ring 6 in the O-ring groove of the rotor carrier, which is behind the surface with two drive flats. (Figure 18)
4.16 Repeat steps 4.5 through 4.9 to assemble the outboard mating ring 3B , outboard stator 3 , outboard stator O-ring P2 , outboard stator carrier SC , and springs C onto the rotor carrier/sleeve assembly.
4.17 Place the outboard dynamic O-ring P in the dynamic O-ring surface of the gland assembly. (Figure 19)
Gland
Assembly
Drive Pins
Figure 20
4.1 8Align the gland assembly drive pins with the slots in the out­side diameter of the stator carrier and press the gland onto the stator carrier, using even hand pressure. (Figure 20) Caution: do not rotate the gland to align pins while pressing down. This could damage the springs. Once the gland is in the proper position do not rotate it until the seal is fully assembled to ensure that the pins remain engaged.
9
4.19 Place the sleeve collar 9 onto the end of the sleeve with the “Flowserve” logo facing up. Align the quarter dog set screws with the smaller holes in the end of the sleeve. (Figure 21) On smaller seal sizes, one of the quarter dog set screws will be offset by 15 degrees. Align this quarter dog set screw with the correspond­ing offset hole in the end of the sleeve. Do not tighten any set screws at this time. Install the centering tabs CT and flat head cap screws into the collar while engaged with the gland. Be sure to keep the collar aligned and be careful not to rotate the gland.
4.20Using firm hand pressure, press down on the collar to be even with the end of the sleeve assembly. This will in turn press down the gland and inner gland, compressing the springs. While holding the collar even with the end of the sleeve assembly, tighten the quarter dog set screws into the holes in the sleeve until snug.
Be careful not to distort the sleeve by over tightening the quarter dog set screws.
Figure 21
Centering
Tabs
CT
Figure 22
Note: if the collar cannot be pressed down to be even with the end of the sleeve, the gland or inner gland drive pins may not be aligned. If this is the case, do not attempt to rotate the gland or inner gland to align the pins. The gland and/or inner gland should be disassembled and re-aligned prior to proceeding further.
10
O-ring
11
Figure 23
4.21Install the shaft O-ring 11 into the inside diameter groove of the sleeve assembly. (Figure 23)
4.22Adhere the gland gasket G to the inner gland gasket surface with a spray adhe­sive such as 3M Super 77®2. (Figure 23)
Gland Gasket
G
5 Static Testing
5.1 Flowserve manufacturing typically tests the ISC at 25 psig. A pressure drop of less than one pound at 25 psig is acceptable. To static test the seal, bolt or clamp the seal to a pump seal chamber or other device which will hold the inner gland up against the gland. WARNING: Failure to do this will result in the inner gland unseating from the gland under pressure, possibly resulting in damage to the inner gland O-ring and also causing a personal safety risk. Secure the cup point set screws to the stub shaft or equipment shaft to prevent deformation of the centering tabs due to axial loads. Apply pressure at either of the tangential barrier fluid ports, while plugging the opposite port. If the seal does not pass the static pressure test, disassemble the seal and inspect for O-ring damage, as this is the most common cause of static test failure.
6 Installation
6.1 Refer to the ISC Installation Instructions, FIS120, for proper seal installation.
2 Trademark of Minnesota Mining and Manufacturing Company.
11
TO REORDER REFER TO B/M #
.
F.O
The information and specifications presented in these repair instructions are believed to be accurate, but are not guaranteed by Flowserve as to completeness or accuracy. Although Flowserve Corporation can provide general application guidelines, it cannot provide specific information for all possible applications. The purchaser/user must therefore assume the ultimate responsibility for the proper selection, installation, operation and maintenance of Flowserve products. Because Flowserve Corporation is continually improving and upgrading its product design, the specifications, dimensions and information contained herein are subject to change without notice.
Flowserve Corporation Flow Solutions Division
Primary Worldwide Flow Solutions Division Locations Licensees, authorized agents, and affiliated companies located worldwide
United States
Kalamazoo, MI Phone 616-381-2650 Fax 616-381-8368
Edmonton, Alberta Phone 780-463-7958 Fax 780-450-1241
Canada
Scarborough, Ontario Phone 416-292-2877 Fax 416-292-5190
Singapore Japan
Phone 65-746-4318 Fax 65-747-1963
Printed in U.S.A.
Tlaxcala Phone 52-2-461-6791 Fax 52-2-461-6847
Sao Paulo Phone 55-11-4066-8600 Fax 55-11-4066-70144
Netherlands
Roosendaal Phone 31-165-581400 Fax 31-165-552622
Osaka Phone 81-720-85-5571 Fax 81-720-85-5575
www.flowserve.com
ISO 9000
Certified
Argentina
Villa Martelli Phone 54-11-4709-6800 Fax 54-11-4709-7072
GermanyBrazilMexico
Dortmund Phone 49-231-6964-0 Fax 49-231-6964-248
Australia
Marayong NSW Phone 61-2-8822-7100 Fax 61-2-9679-7511
FIS137
ORG 06/00 USA
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