Flowserve ISC1PX Setup guide

Repair
Instructions
Experience In Motion
ISC
ISC1PX
Single Pusher Seal

1 Nomenclature
2
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.
19 183 1 100 24 40 57.1 103
18 76 2151413.1 13 16 58 57
11
2 Disassembly
Note: Primary seal O-rings (13, 13.1,76) are
all the same size and cross section.
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
1Sleeve Assembly
2Seal Drive
183 Vibration Dampener
58 Drive Collar
57 Cup Point Set Screw
57.1 Quarter Dog Set Screw
19 Sleeve Gasket
Table 1
Figure 1
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 5 7.1
• Gland Bushing 24
Reconditionable Seal Parts
• Gland assembly 11
• Sleeve assembly 1
• Drive collar 58
• Seal Drive 2

3
ADynamic O-ring surface - Inspect for wear,
fretting, nicks, scratches, or corrosion.
Required surface nish: 32 RMS
BGasket 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.
DBushing - 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.
EAnti-rotation pins - Inspect for wear or corrosion. If worn or corroded,
contact your Flowserve representative.
3.3 Sleeve Assembly 1(Figure 3)
AO-ring surfaces - Inspect for wear,
nicks, scratches, or corrosion.
Required surface nish: 63 RMS.
3.2 Gland Assembly 11 (Figure 2)
3 Inspection and Reconditioning
1 Registered Trademark of Loctite Corporation
Figure 2
BSeal Drive 2- Inspect for wear or
corrosion, especially at drive at
surfaces on ID of drive ring.
CDrive end roundness -
No greater than 0.001" TIR
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.
3.4 Drive Collar 58 (Figure 4)
AThreaded holes - Inspect for thread damage and
re-tap as necessary.
BID bore roundness - no greater than 0.002" TIR
CSet 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.
Figure 3
Figure 4
E
D
A
C
B
A
C
B
A
B

4
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 and clean, lint free towel for cleaning seal faces
4.2 As part of the assembly of the seal, there are several blind ts of pins and
drive ats. It may be helpful to mark the locations of the pins or drive ats
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 prior to placing the faces together at each respective step in the
assembly process.
4.3 Arrange O-rings by dia-
metrical size. There are two
sizes: three of the largest
size (O-rings 13 , 13.1 , and
76 ), and one of the smallest
size (O-ring 19 ). Prior to
installing each O-ring at its
respective step, lightly
lubricate with silicone grease
and stretch slightly.
4.4 Place the sleeve assembly
1 on a at surface with the
drive collar end facing up.
Install the vibration dampener
183 into sleeve end housing.
Place the rotating face O-ring
76 in sleeve O-ring groove
behind surface with drive ats
in sleeve. Install sleeve
gasket O-ring in groove in ID
of sleeve. (Figure 5)
4.5 Align the two ats on the
rotating face 15 with the
two ats on the inside of
the seal drive 2and press
the rotating face into place
using nger pressure only.
(Figure 6)
Figure 5
Figure 6
Sleeve
Gasket
O-ring
19
Rotating Face
Gasket 76 Vibration
Dampner
183
Rotating
Face
15
Drive
Flats
Seal
Drive
2

5
4.6 Place the seat gasket O-ring
13.1 on the O-ring surface
of the stationary face 14 ,
which is the smallest outside
diameter. Place the stationary
face with the sealing face
down on a clean, at surface.
(Figure 7)
4.7 Align the stationary face drive
pins in stator face support 100
with the drive slots in the
stationary face and press the
stationary face support in
place using nger pressure
only. (Figure 8)
4.8 Install the springs 16 in holes
of stator face support.
4.9 Place the stationary face
and stationary face support
assembly face down onto the
sleeve/rotating face assembly.
(Figure 9)
Figure 7
Figure 8
Figure 9
Seat Gasket
O-ring 13.1
Stationary
Face
14
Align
Drive Pin
with Slot
Face
Support Spring
Locations
Stationary
Face
14
Stationary Face and
Stationary Face
Support Assembly
Sleeve and Rotating
Face Assembly

6
4.10 Place the outboard dynamic
seat gasket O-ring 13 in the
dynamic O-ring surface of the
gland assembly. (Figure 10)
4.11 Align the gland assembly
drive pins (Figure 10) with
the slots in the outside
diameter of the stationary
face support. Firmly and
evenly press the gland onto
the stationary face support.
(Figure 11)
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.
4.12 Place the drive collar 58
onto the end of the sleeve
with the “Flowserve” logo
facing up. (Figure 12) Align
the quarter dog set screws
with the smaller holes in the
end of the sleeve. 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 setting
devices 103 and at head
cap screws into the drive
collar while engaged with the
gland. Be sure to keep the
drive collar aligned and be
careful not to rotate the
gland.
Figure 10
Figure 11
Figure 12
Seat Gasket O-ring
13
Gland
Assembly
Drive Pins
Setting
Devices
103

7
4.13 Compress the drive collar to be
even with the end of the sleeve
assembly. This will also compress
the gland. While holding the
collar in compression, tighten
the quarter dog set screws into
the holes in the sleeve until
snug. (Figure 13)Be careful
not to distort the sleeve by
over tightening the quarter
dog set screws.
Note: if the drive collar cannot be
compressed to be even with
the end of the sleeve, the gland
drive pins may not be aligned.
If this is the case, do not
attempt to rotate the gland to
align the pins. The gland should
be disassembled and re-aligned
prior to proceeding further.
4.14 Install the sleeve gasket O-ring 19
into the inside diameter groove of
the sleeve assembly. (Figure 14)
4.15 Apply an even coat of 3M®2
Super 77 spray adhesive,
free of bubbles and nodules,
to the gland gasket 18 . Adhere
the gasket to the gland gasket
surface. (Figure 14)
5 Static Testing
Figure 13
Figure 14
Sleeve
Gasket
O-ring
19
Gland
Gasket
18
5.1 Flowserve manufacturing typically air 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 it to a single seal test barrel or to the equipment. Secure the cup point
set screws to the stub shaft or equipment shaft to prevent deformation
of the setting devices due to axial loads. The seal may be pressurized
through either of the tangential ush ports. 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.

TO REORDER REFER TO
B/M #
F.O.
FIS136eng REV 09/2018 Printed in USA
flowserve.com
To find your local Flowserve representative
and find out more about Flowserve Corporation,
visit www.flowserve.com
Flowserve Corporation has established industry leadership in the design and manufacture of its products.
When properly selected, this Flowserve product is designed to perform its intended function safely during
its useful life. However, the purchaser or user of Flowserve products should be aware that Flowserve
products might be used in numerous applications under a wide variety of industrial service conditions.
Although Flowserve can provide general guidelines, it cannot provide specific data and warnings for all
possible applications. The purchaser/user must therefore assume the ultimate responsibility for the proper
sizing and selection, installation, operation, and maintenance of Flowserve products. The purchaser/user
should read and understand the Installation Instructions included with the product, and train its employees
and contractors in the safe use of Flowserve products in connection with the specific application.
While the information and specifications contained in this literature are believed to be accurate, they
are supplied for informative purposes only and should not be considered certified or as a guarantee of
satisfactory results by reliance thereon. Nothing contained herein is to be construed as a warranty or
guarantee, express or implied, regarding any matter with respect to this product. Because Flowserve is
continually improving and upgrading its product design, the specifications, dimensions and information
contained herein are subject to change without notice. Should any question arise concerning these
provisions, the purchaser/user should contact Flowserve Corporation at any one of its worldwide
operations or offices.
© Copyright 2007 Flowserve Corporation
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