Flowserve ISC2 User Manual
ISC2
Single pusher seal
Repair
Instructions
Experience In Motion
1 Nomenclature
Part
Sizes
≤ 2.750 inch
(70 mm)
ISC2-PX
1.875
316 SS
marking
sample
1 18 11 13.1 13 16 24 111 103 57 40
19 5 183 76 15 14 100 5 13 57.1 58
Sizes
> 2.750 inch
(70 mm)
Figure 1
Part references in this document are denoted in square parenthesis, e.g. [15]
Primary seal O-rings [13], [13.1] and [76] are the same size and cross-section.
Part Description
Ref.
1 Sleeve Assembly
5 Square-headed Pin
11 Gland
13 Seat Gasket O-ring
13.1 Seat Gasket O-ring
14 Stationary Face
15 Rotating Face
16 Springs
18 Gland Gasket
19 Sleeve Gasket O-ring
24 Gland Bushing
40 Cap Screw
57 Cup-point Set Screw
57.1 Quarter-dog Set Screw
58 Drive Collar
76 Rotating Face Gasket O-ring
100 Stationary Face Support
103 Setting Device
111 Snap Ring
183 Vibration Dampener
2 Disassembly
When disassembling the seal, inspect for conditions which may have caused 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.
3 Repair or Replace Guide
Seal parts that are always replaced
• Stationary face [14]
• Rotating face [15]
• Springs [16]
• Square-headed pin [5]
• Stationary face support [100]
• All gaskets (O-rings) [13], [13.1], [19] and [76]
• Gland gasket [18]
• Vibration dampener [183]
• Setting devices [103] and cap screws [40]
• Cup-point [57] and quarter-dog set screws [57.1]
• Gland bushing [24] and snap ring [111]
2
Seal parts that are reconditionable
• Gland assembly [11]
• Sleeve assembly [1]
• Sleeve collar [58]
4 Inspection and Reconditioning
There are certain critical areas of each part where special attention should be
paid to the condition. If any of the listed areas 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 - 0.002 inch (0.025 - 0.05 mm), then the
respective part should be replaced. If grit blasting is performed, polish the O-ring
surfaces to achieve the required surface nish (see critical area listings for nish
requirements). If any parts require machining to correct damage, please contact
your Flowserve representative for dimensional requirements, or for any other
questions regarding repair.
4.1 Gland assembly [11] see Figures 2 and 3.
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.
C Pipe taps and lifting holes - Inspect for
damaged threads or corrosion. Re-tap as
necessary.
B
Figure 2
A
D
C
D Anti-rotation pins - Inspect for wear or
corrosion. Replace as necessary.
4.2 Sleeve assembly [1] see Figures 4 and 5.
A O-ring surfaces - Inspect for wear, nicks,
scratches, or corrosion. Required surface
nish: 63 RMS.
B Drive ats or drive pin - Inspect for wear or
corrosion. Replace pin as necessary.
C Drive end roundness - No greater than
0.001 inch (0.025 mm) TIR (Total Indicated
Reading) under the bushing.
D Inspect ID of sleeve at weld point for
corrosion.
C
B
D
A
Figure 3
3
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