Flowserve ISC User Manual
Experience In Motion
ISC Series
Innovative Standard Cartridge seal designed
for ANSI and general purpose applications with
maximum interchangeability between designs.
Installation
Instructions
Description
This ISC seal is a cartridge mounted mechanical seal, designed for ease
of installation and reliable operation. No seal setting dimensions are
required. Removable setting devices provide proper alignment.
The ISC seal family consists of:
ISC1PX - Single Pusher Seal stationary springs
ISC2PP - Dual Pusher Seal stationary springs
ISC1BX - Single Metal Bellows Seal rotating bellows (standard)
ISC2BB - Dual Metal Bellows Seal rotating bellows (standard)
ISC1SX - Single Metal Bellows Seal stationary bellows (optional)
ISC2SS - Dual Metal Bellows Seal stationary bellows (optional)
ISC1EX - Single Elastomer Bellows Seal
The exible stator pusher design compensates for inadvertent
misalignment of the seal chamber face. Multiple springs provide uniform
face loading and are external of the process uid, resisting clogging and
stress corrosion.
The bellows design is available in both rotating and stationary bellows
arrangements.
Rotating bellows arrangements are used when the self cleaning
feature is required and stationary bellows are used to compensate for
inadvertent misalignment of the seal chamber face.
Installation according to the following steps will assure long trouble free
life of the seal.
1 Equipment Check
1.1 Follow plant safety regulations prior to equipment disassembly:
• lock out motor and valves.
• wear designated personal safety equipment.
• relieve any pressure in the system.
• consult plant MSDS les for hazardous material regulations.
1.2 Disassemble equipment in accordance with equipment
manufacturer’s instructions to allow access to seal installation area.
1.3 Remove existing mechanical seal and gland or compression
packing and packing gland.
The images of parts shown in these instructions may differ visually from the actual
parts due to manufacturing processes that do not affect the part function or quality.
2
Seal Chamber Requirements Figure 1
To first obstruction
Face of seal housing to be square to the axis
of the shaft to within 0.013 mm per millimeter
(0.0005 inches) of seal chamber bore FIM and
have a √1.6
μm (63 μinch) R finish or better
a
Gland pilot can be at either of these
register locations, concentric to within
0.13 mm (0.005 inch) FIM of shaft or sleeve OD
Seal housing bore to have √3.2 μm
(125 μinch) R finish or better
Sleeve or shaft finish to be
0.8 μm (32 μinch) R or better
a
a
Shaft or sleeve OD
+0.000 mm (+0.000 inch)
-0.050 mm (-0.002 inch) ANSI
+0.000 mm (+0.000 inch) API 610/682
-0.025 mm (- 0.001 inch) DIN/ISO
• Bearings must be in good condition
• Maximum lateral or axial movement of shaft (end play) = 0.25 mm (0.010 inch) FIM
• Maximum shaft runout at face of seal housing = 0.05 mm (0.002 inch) FIM
• Maximum dynamic shaft deflection at seal housing = 0.05 mm (0.002 inch) FIM
If the pump condition exceeds the above criteria (including consideration for thermal growth), consult
Flowserve Application Engineering for recommendations to avoid seal performance compromises.
1.4 Make sure the shaft or sleeve and the seal housing face are clean
and free of burrs, cuts, dents, or corrosion that might cause leakage
past the sleeve gasket or gland gasket. Replace worn shaft or
sleeve. Remove sharp edges from keyways and threads.
1.5 Check equipment dimensions to ensure that they are within the
specications shown in Figures 1 and 2. Critical dimensions from
Figure 2 include:
• Box Bore (ØC)
• Box Depth (G)(Q)
• Distance to First Obstruction (K)
• Pump Frame accomodates Gland OD (ØE)
1.6 Check gland bolting to ensure the bolt diameter and bolt circle
conform to the dimensions shown in Figure 2. Check gland bolt
length to ensure adequate thread engagement for the actual seal
gland.
1.7 Check gland bolt length to ensure adequate thread engagement
for the actual seal gland. Gland dimensions are provided in the
drawing that accompanied the seal.
1.8 Handle the ISC with care, it is manufactured to precise tolerances.
The sealing faces of the ISC seal are the rotating and stationary
faces. They are lapped at to within three helium light bands (34.8
millionths of an inch). Keep the seal faces perfectly clean at all
times.
3
ISC Dimensional Data Figure 2
ISC1PX
Single Pusher
ISC1BX
Single Metal Bellows
ØC
ØA
Shaft Size
& Seal Size
ØC
ØA
Shaft Size
& Seal Size
G
F
K
J
ØE
G
F
K
J
ØE
All Dimensions millimeter
A C E F G J K L M
Shaft & Box Bore Gland Seal Box Depth Seal Dist. to Bolt Bolt
Seal Size (Min) (Max) OD (Min) Depth (Min) Extension Obst. Dia. Circle Slot
25 41.28 47.50 93.7 - 95.3 5.38 6.96 48.59 50.17 69.85 11.18
28 44.45 50.80 93.7 - 95.3 5.38 6.96 48.59 50.17 73.03 11.18
30 48.01 57.02 106.4 - 108.0 5.38 6.96 48.59 50.17 79.38 14.27
33 50.80 60.33 109.7 - 111.3 5.38 6.96 48.59 50.17 82.55 14.27
35 50.80 60.33 109.7 - 111.3 5.38 6.96 48.59 50.17 82.55 14.27
38 57.15 64.14 119.1 - 120.7 5.38 6.96 50.11 51.69 95.25 14.27
40 60.33 70.61 119.1 - 120.7 5.13 6.71 50.11 51.69 95.25 14.27
43 63.50 73.03 125.5 - 127.0 5.13 6.71 50.11 51.69 98.43 14.27
45 66.68 73.03 125.5 - 127.0 5.13 6.71 50.11 51.69 98.43 14.27
48 67.06 73.41 136.4 - 137.9 5.13 6.71 50.11 51.69 97.99 14.27
50 69.85 76.96 127.0 - 130.0 5.13 6.71 50.11 51.69 104.65 17.48
53 73.03 79.38 150.9 - 152.4 5.13 6.71 50.11 51.69 112.78 19.05
55 79.38 93.65 160.5 - 162.1 5.13 6.71 50.11 51.69 123.83 19.05
60 79.38 94.62 160.5 - 162.1 5.13 6.71 50.11 51.69 123.83 19.05
65 89.92 98.81 179.5 - 181.0 1.93 3.51 53.42 54.99 127.00 17.48
70 95.25 109.52 182.6 - 184.2 5.18 6.76 69.24 70.82 142.88 22.35
4
ISC2BB
Dual Metal Bellows
G
F
K
J
ØC
ØA
Shaft Size
& Seal Size
ISC2PP
G
F
K
J
Dual Pusher
ØC
ØA
Shaft Size
& Seal Size
Slotted Gland Detail
ØL
ØM
A C E F G J K L M
Shaft & Box Bore Gland Seal Box Depth Seal Dist. to Bolt Bolt
Seal Size (Min) (Max) OD (Min) Depth (Min) Extension Obst. Dia. Circle Slot
25 41.28 47.50 93.7 - 95.3 46.69 48.26 52.37 53.95 69.85 11.18
28 44.45 50.80 93.7 - 95.3 46.69 48.26 52.37 53.95 73.03 11.18
30 48.01 57.02 106.4 - 108.0 46.69 48.26 52.37 53.95 79.38 14.27
33 50.80 60.33 109.7 - 111.3 46.69 48.26 52.37 53.95 82.55 14.27
35 50.80 60.33 109.7 - 111.3 46.69 48.26 52.37 53.95 82.55 14.27
38 57.15 64.14 119.1 - 120.7 48.34 49.91 53.90 55.47 95.25 14.27
40 60.33 70.61 119.1 - 120.7 48.34 49.91 53.90 55.47 95.25 14.27
43 63.50 73.03 125.5 - 127.0 48.34 49.91 53.90 55.47 98.43 14.27
45 66.68 73.03 125.5 - 127.0 48.34 49.91 53.90 55.47 98.43 14.27
48 67.06 73.41 136.4 - 137.9 48.34 49.91 53.90 55.47 97.99 14.27
50 69.85 76.96 127.0 - 130.0 48.34 49.91 53.90 55.47 104.65 17.48
53 73.03 79.38 150.9 - 152.4 48.34 49.91 53.90 55.47 112.78 19.05
55 79.38 93.65 160.5 - 162.1 48.34 49.91 53.90 55.47 123.83 19.05
60 79.38 94.62 160.5 - 162.1 48.34 49.91 53.90 55.47 123.83 19.05
65 89.92 98.81 179.5 - 181.0 45.06 46.63 57.20 58.78 127.00 17.48
70 95.25 109.52 182.6 - 184.2 61.70 63.27 73.81 75.39 142.88 22.35
ØE
ØE
5
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