Chesterton 442C Manual

442C™Cartridge
Split Mechanical Seal
Installation, Operation and Maintenance Instructions
TABLE OF CONTENTS
INSTALLATION, OPERATION and
MAINTENANCE INSTRUCTIONS
Seal Data Reference
(Insert seal and equipment data here for future reference)
0;,4
:,(3
(Example: 442C – 50 mm SSC/CB)
05:;(33(;065+(;,
1.0 Cautions................................................................... 2
2.0 Transport and Storage......................................... 2
3.0 Description.............................................................. 2
3.1 Parts identification..........................................................2
3.2 Operating parameters.....................................................3
3.3 Intended use..................................................................3
3.4 Dimensional Data ..................................................... 4 - 5
4.0 Preparation for Installation........................... 6 - 8
4.1 Equipment .....................................................................6
4.2 442C Cartridge Split Mechanical Seal..............................8
5.0 Seal Installation .............................................9 - 11
5.1 442C Installation Video .................................................11
6.0 Commissioning/Equipment Start-up............. 11
7.0 Decommissioning/Equipment Shut Down... 11
8.0 Spare Parts ........................................................... 11
9.0 Seal Maintenance and Repair ................ 12 - 16
9.1 442C Seal Repair Instruction Video................................16
9.2 Returning Seals for Repair;
Hazard Communication Requirements ...........................16
TABLE
1.
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3
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4
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4
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1
E
qu
ip
4
.
2
442
C
5.
0
Sea
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5
.1 442
C
6
.
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Co
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7.
0
Dec
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8
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0
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9.
1
442
C
9
.2 Retu
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r

2
KEY
1 - Rotary Holder
2 - Holder Cap Screw (X)
3 - Holder Gasket
4 - Shaft O-ring
5 - Rotary O-ring
6 - Rotary Face
7 - Stationary Face
8 - Stationary O-ring
9 - Gland Gasket
10 - Gland Cap Screw (Y)
11 - Stuffing Box Gasket
12 - Bolt Tab
13 - Spring
14 - Spring Retainer
15 - Centering Button
16 - Gland
17 - Stuffing Box Bolts (Z)
18 - Spring Lifter
19 - Holder Set Screw (W)
These instructions are general in nature. It is assumed
that the installer is familiar with seals and certainly with
the requirements of their plant for the successful use of
mechanical seals. If in doubt, get assistance from someone
in the plant who is familiar with seals or delay the installation
until a seal representative is available. All necessary auxiliary
arrangements for successful operation (heating, cooling,
flushing) as well as safety devices must be employed. These
decisions are to be made by the user. The decision to use this
seal or any other Chesterton seal in a particular service is the
customer’s responsibility.
Transport and store seals in their original packaging.
Mechanical seals contain components that may be subject to
alteration and ageing. It is therefore important to observe the
following conditions for storage:
Do not touch the mechanical seal for any reason while it is
operating. Lockout or uncouple the driver prior to personal
contact with the seal. Do not touch the mechanical seal
while it is in contact with hot or cold fluids. Ensure that all the
mechanical seal materials are compatible with the process
fluid. This will prevent possible personal injury.
• Dust free environment
• Moderately ventilated at room temperature
• Avoid exposure to direct sunlight and heat
• For elastomers, storage conditions according to ISO 2230
should be observed.
1.0 CAUTIONS
2.0 TRANSPORT AND STORAGE
3.0 DESCRIPTION
3.1 Parts Identification
Figure 1
1
2
3
4
6
7
8
9
10
11
12
14
13
15
16
17
18
19
5

3
3.0 DESCRIPTION cont.
3.2 Operating Parameters*
Pressure Limits:
All 442 Seals can withstand operating pressures from full
vacuum (710 mm Hg /28") to the maximum pressures at the
conditions listed.
Small Sizes:
25 mm through 60 mm (1.000" through 2.500")
Reaction Bonded Silicon Carbide/Carbon – (3600 RPM)
up to 30 bar g/450 psig
Use 4 bolt mounting configuration for pressures above
20 bar g/300 psig
Large Sizes:
65 mm through 120 mm (2.625" through 4.750")
Reaction Bonded Silicon Carbide/Carbon – (1750 RPM)
up to 18 bar g/250 psig
Use 4 bolt mounting configuration for pressures above
14 bar g/200 psig
Speed Limits:
To 20 m/s (4000 fpm)
Temperature Limits:
To 120°C (250°F)
* Consult Chesterton Mechanical Seal Application Engineering for higher
operating conditions.
3.3 Intended Use
The mechanical seal is specifically designed for the intended
application and is to be operated within the operating
parameters as specified. For use beyond the intended
application and/or outside the operating parameters, consult
Chesterton to confirm the suitability of the mechanical seal
prior to putting the mechanical seal in operation.

4
KEY (chart)
A – Shaft Size
B – Max. Gland Dia.
C – Min./Max. Stuffing Box Dia.
D – Gland Length
E – Minimum Stuffing Box Depth
F – Outboard Seal Length
G – Min./Max. Bolt Circle by Bolt Size
H – Min. Stuffing Box Face OD
L – Gland Hub OD
M – Holder End from Box
N – Installation Dimension
P – NPT Size
Q – Shaft O-ring from Box
R – Set Screw from Box
E
N
D
G
H
C
B
L
P NPT
P NPT
M
A
F
Q
R
Table 1 - Dimensional Data (Metric & Inch)
2 BOLTS 3 BOLTS 4 BOLTS
Figure 3 – Mounting Configurations with Bolt Tabs
SHAFT SIZE
M
HOLDER ID
FROM BOX
N
INSTALLATION
DIM
P
NPT
SIZE
Q
SHAFT O-RING
FROM BOX
R
SET SCREW
FROM BOX
25 mm to 60 mm
(1.000" to 2.500"
24,4 mm
(0.96")
2,4 mm
(0.094") 1/4" 12,7 mm
(0.50")
5,8 mm
(0.230”)
65 mm to 120 mm
(2.625" to 4.750")
27,1 mm
(1.07")
2,4 mm
(0.094") 3/8" 12,4 mm
(0.49")
5,8 mm
(0.230”)
3.0 DESCRIPTION cont.
3.4 Dimensional Data (Drawings)
Figure 2

5
3.0 DESCRIPTION cont.
Table 2 – Dimensional Data
METRIC - Millimeters
AB
MAX
CDE
MIN FG MIN H MIN
L
MAX
MIN MAX 8 mm 10 mm 12 mm 14 mm 16 mm 18 mm 20 mm
25,0 125,5 47,2 53,3 40,1 4,3 47,8 79,8 81,8 83,8 85,8 87,8 - - 59,9 70,9
30,0 125,5 47,2 53,3 40,1 4,3 47,8 79,8 81,8 83,8 85,8 87,8 - - 59,9 70,9
32,0 125,5 47,2 53,3 40,1 4,3 47,8 79,8 81,8 83,8 85,8 87,8 - - 59,9 70,9
33,0 125,5 47,2 53,3 40,1 4,3 47,8 79,8 81,8 83,8 85,8 87,8 - - 59,9 70,9
35,0 127,4 49,3 60,5 40,1 4,3 47,8 81,8 83,8 85,8 87,8 89,8 - - 66,8 72,8
38,0 130,5 52,3 63,5 40,1 4,3 47,8 85,0 87,0 89,0 91,0 93,0 - - 69,9 76,0
40,0 133,6 55,6 66,8 40,1 4,3 47,8 87,4 89,4 91,4 93,4 95,4* - - 73,2 79,0
43,0 136,8 58,7 70,0 40,1 4,3 47,8 90,5 92,5 94,5 96,5 98,5* - - 76,2 82,0
45,0 136,8 58,7 70,0 40,1 4,3 47,8 90,5 92,5 94,5 96,5 98,5* - - 76,2 82,0
48,0 140,0 62,0 73,2 40,1 4,3 47,8 97,7 95,7 97,7 99,7 101,7* - - 79,5 85,2
50,0 143,2 65,0 76,2 40,1 4,3 47,8 98,4 100,4 102,4 104,4 106,4* - - 82,6 88,4
55,0 146,3 68,3 79,2 40,1 4,3 47,8 101,6 103,6 105,6 107,6 109,6 - - 85,9 91,5
60,0 152,6 74,7 85,6 40,1 4,3 47,8 107,8 109,8 111,8 113,8 115,8 - - 92,2 97,9
65,0 196,1 85,1 108,0 48,0 8,1 57,7 - - 140,6 142,6 144,6 146,6* 148,6* 120,7 126,6
70,0 202,5 91,4 108,0 48,0 8,1 57,7 - - 146,2 148,2 150,2 152,2 154,2* 120,7 133,0
75,0 202,5 91,4 114,3 48,0 8,1 57,7 - - 146,2 148,2 150,2 152,2 154,2* 127,0 133,0
80,0 208,8 97,8 120,7 48,0 8,1 57,7 - - 154,8 156,8 158,8 160,8 162,8 133,4 139,3
85,0 215,2 104,1 127,0 48,0 8,1 57,7 - - 158,9 160,9 162,9 164,9 166,9 139,7 145,7
90,0 215,2 104,1 127,0 48,0 8,1 57,7 - - 158,9 160,9 162,9 164,9 166,9 139,7 145,7
95,0 221,5 110,5 133,4 48,0 8,1 57,7 - - 165,2 167,2 169,2 171,2 173,2 146,1 152,0
100,0 227,9 116,8 139,7 48,0 8,1 57,7 - - 171,6 173,6 175,6 177,6 179,6 152,4 158,4
105,0 234,2 123,2 146,1 48,0 8,1 57,7 - - 177,7 179,7 181,7 183,7 185,7 160,3 164,7
110,0 240,6 129,5 152,4 48,0 8,1 57,7 - - 184,3 186,3 188,3 190,3 192,3 165,1 171,1
115,0 240,6 129,5 152,4 48,0 8,1 57,7 - - 184,3 186,3 188,3 190,3 192,3 165,1 171,1
120,0 246,9 135,9 158,8 48,0 8,1 57,7 - - 190,6 192,6 194,6 196,6 198,6 171,5 177,4
INCH
AB
MAX
CDE
MIN FG MIN H
MIN
L
MAX
MIN MAX 3/8” 1/2” 5/8” 3/4” 7/8”
1.000 4.94 1.86 2.10 1.58 0.17 1.88 3.20 3.33 3.45 3.58* - 2.35 2.79
1.125 4.94 1.86 2.10 1.58 0.17 1.88 3.20 3.33 3.45 3.58* - 2.35 2.79
1.250 4.94 1.86 2.10 1.58 0.17 1.88 3.20 3.33 3.45 3.58* - 2.35 2.79
1.375 5.02 1.94 2.38 1.58 0.17 1.88 3.28 3.40 3.53 3.66* - 2.63 2.87
1.500 5.14 2.06 2.50 1.58 0.17 1.88 3.40 3.53 3.65 3.78* - 2.75 2.99
1.625 5.26 2.19 2.63 1.58 0.17 1.88 3.50 3.63 3.81* 3.94* - 2.87 3.11
1.750 5.39 2.31 2.75 1.58 0.17 1.88 3.63 3.75 3.94* 4.06* - 3.00 3.23
1.875 5.51 2.44 2.88 1.58 0.17 1.88 3.75 3.88 4.06* 4.19* - 3.12 3.35
2.000 5.64 2.56 3.00 1.58 0.17 1.88 3.94 4.06 4.19* 4.31* - 3.25 3.48
2.125 5.76 2.69 3.12 1.58 0.17 1.88 4.06 4.19 4.31 4.44* - 3.37 3.60
2.250 5.88 2.81 3.25 1.58 0.17 1.88 4.19 4.31 4.44 4.56* - 3.50 3.73
2.375 6.01 2.94 3.37 1.58 0.17 1.88 4.31 4.43 4.56 4.69* - 3.62 3.85
2.500 6.13 3.06 3.75 1.58 0.17 1.88 4.57 4.70 4.82 4.95* - 4.00 4.23
2.625 7.72 3.35 4.25 1.89 0.32 2.27 5.44 5.56 5.69 5.81* 5.94* 4.75 4.99
2.750 7.72 3.35 4.25 1.89 0.32 2.27 5.44 5.56 5.69 5.81* 5.94* 4.75 4.99
2.875 7.97 3.60 4.50 1.89 0.32 2.27 5.66 5.78 5.91 6.03* 6.16* 5.00 5.24
3.000 7.97 3.60 4.50 1.89 0.32 2.27 5.66 5.78 5.91 6.03* 6.16* 5.00 5.24
3.125 8.22 3.85 4.75 1.89 0.32 2.27 6.00 6.12 6.25 6.37* 6.50* 5.25 5.48
3.250 8.22 3.85 4.75 1.89 0.32 2.27 6.00 6.12 6.25 6.37* 6.50* 5.25 5.48
3.375 8.47 4.10 5.00 1.89 0.32 2.27 6.16 6.28 6.41 6.53 6.66* 5.50 5.74
3.500 8.47 4.10 5.00 1.89 0.32 2.27 6.16 6.28 6.41 6.53 6.66* 5.50 5.74
3.625 8.72 4.35 5.25 1.89 0.32 2.27 6.41 6.53 6.66 6.78 6.91* 5.75 5.99
3.750 8.72 4.35 5.25 1.89 0.32 2.27 6.41 6.53 6.66 6.78 6.91* 5.75 5.99
3.875 8.97 4.60 5.50 1.89 0.32 2.27 6.66 6.78 6.91 7.03 7.16* 6.00 6.24
4.000 8.97 4.60 5.50 1.89 0.32 2.27 6.66 6.78 6.91 7.03 7.16* 6.00 6.24
4.125 9.22 4.85 5.75 1.89 0.32 2.27 6.90 7.02 7.15 7.27 7.40* 6.25 6.49
4.250 9.22 4.85 5.75 1.89 0.32 2.27 6.90 7.02 7.15 7.27 7.40* 6.25 6.49
4.375 9.47 5.10 6.00 1.89 0.32 2.27 7.16 7.28 7.41 7.53 7.66* 6.50 6.74
4.500 9.47 5.10 6.00 1.89 0.32 2.27 7.16 7.28 7.41 7.53 7.66* 6.50 6.74
4.625 9.72 5.35 6.25 1.89 0.32 2.27 7.41 7.53 7.66 7.78 7.91* 6.75 6.99
4.750 9.72 5.35 6.25 1.89 0.32 2.27 7.41 7.53 7.66 7.78 7.91* 6.75 6.99
* Two bolts only using bolt tabs

6
If practical, place the dial indicator tip on the end of the shaft
sleeve or on a step in the shaft to measure end play. Alternately
push and pull the shaft in the axial direction. If the bearings are
in good condition, end play should not exceed 0,13 mm (.005”).
Remove all sharp corners, burrs, and scratches on the shaft,
especially in areas where the O-ring will slide, and polish if
necessary to achieve a 0,8 micron (32 microinch) Ra finish.
Make sure the shaft or sleeve diameter is within 0,05mm
(.002”) of nominal.
Use a dial indicator to measure the shaft runout in the
area where the seal will be installed. Runout should not
exceed 0,001 mm TIR per millimeter (.001 inch TIR per inch)
of shaft diameter.
If possible, attach a base dial indicator to the shaft and rotate
both the indicator and shaft slowly while reading the runout
of the stuffing box face. Misalignment of the stuffing box face
relative to the shaft should not exceed 0,005 mm TIR per mm
(.005in per inch) of shaft diameter.
The stuffing box face must be flat and smooth enough to
seal the gland. Surface roughness should be 3,2 microns
(125 microinch) Ra maximum for gaskets and 0,8 micron (32
microinch) Ra for O-rings. Steps between halves of split case
pumps should be machined flat. Make sure the stuffing box is
clean and clear along it’s entire length.
4.0 PREPARATION FOR INSTALLATION
4.1 Equipment
2
1
34
.005"
0,13 mm
32 μ"
0,8 μm Ra
ø
ø
200
<
<
ø
<ø
1000
ø
<
.002"
0,05 mm
±
125 μ"
3,2 μm

7
4.2 442C Cartridge Split Mechanical Seal
Review seal packaging ensuring no damage or shortage has
occurred to the contents.
Review the seal fit dimensions in Tables 1, 2 and 3 to ensure
the equipment to be sealed has the required dimensions.
Record the seal Item Number and Name found on the label
for referencing when contacting AW Chesterton Application
Engineering.
Installation is straightforward, provided the parts are handled
and installed carefully. Make sure your hands are clean.
Prepare a clean work surface on which to place parts.
NOTES:
• The gland and rotary holder halves are matched pairs by
the same number stamped on each half; face halves are
matched pairs; mixing components from different seals will
result in seal failure.
• Greasy fingerprints on seal faces, dirt particles on the
faces seal faces/splits or misaligned face splits may cause
leakage. Do not bring the assembly halves together before
actual installation. Damage to the seal ring splits may occur.
REQUIRED FOR INSTALLATION
(Items are provided with seal):
• Hex key wrenches
• Grease
• Cleaning wipes
4.0 PREPARATION FOR INSTALLATION cont.

1
4
7
10
5
8
Remove seal from packaging and place
on clean work surface. Ensure installation
spacers are seated on OD of rotary holder
halves.
Ensure that the gland gaskets are properly
greased and seated in their grooves.
Caution: Do not glue the gland gaskets in
place.
Ensure that gland spring lifter is extended
prior to starting installation of gland
assembly.
Ensure the rotary face O-rings are
positioned in holder O-ring detent and
shaft O-rings are properly greased and
seated in their grooves. Caution: Do not
glue elastomers in place.
Ensure the holder O-rings are protruding
equally on both ends of rotary holder.
9
Spring Lifter
Shaft O-ring
Rotary Seal Ring
O-ring Detent
Ensure that the holder gaskets are
properly greased and seated in their
grooves. Caution: Do not glue the holder
gaskets in place. Set screws must not
protrude past ID of holder.
8
2 3
2X
2X
4.0 PREPARATION FOR INSTALLATION cont.
Disengage rotary holder screws and
separate rotary holder halves.
Disengage gland cap screws and separate
gland halves.
Remove rotary holder shipping spacer
from each holder half by pulling on tab;
retain for future use. Caution: Avoid
contact or displacement of the rotary
face halves from the shipped position.
Re-install shipping spacers if this occurs.
Remove gland split shipping spacers from
each gland half.
6
2X
2X

9
5.0 SEAL INSTALLATION
1
4
76
2
5
Bring holder assembly halves together
over shaft, engaging the pins. Note: If
shaft cannot be rotated manually, the
holder split line should not align with the
gland split line.
Check gaps at holder splits; gaps should
be equal on both sides.
If rotary face is clean, no additional
cleaning is required. Otherwise wipe
rotary face with cleaning wipe, ensuring
that there is no debris at splits. Caution:
Do not push on seal face - it may cause
the seal face to misalign and cause seal
leakage.
Alternately tighten 2 holder set screws (1
per holder half) (refer to Table 4 – Holder
Set Screw Torque Values).
Use hex wrench and alternately tighten
holder cap screws to finger-tightness to
allow holder to slide.
Remove plastic installation spacers.
Push holder assembly so that plastic
installation spacers contact the stuffing
box face. Use hex wrench and alternately
tighten holder cap screws (refer to Table 3
– Holder Cap Screw Torque Values; refer
to Figure 4 for holder split gaps). Caution:
DO NOT push directly on seal face.
3
2X
2X
2X
2X
2X
2X
2X
Table 3 – Holder Cap Screw
Torque Values
SEAL SIZE
HOLDER
CAP SCREW*
(X)
HEX
WRENCH
SIZE
up to 60 mm
(2.5")
4,8 Nm
(43 in-lbf) 5/32
up to 120 mm
(4.75")
12,4 Nm
(110 in-lbf) 3/16
* Recommended maximum
Table 4 – Holder Set Screw
Torque Values
SEAL SIZE
HOLDER
SET SCREW*
(W)
HEX
WRENCH
SIZE
up to 120 mm
(4.75")
4,3 Nm
(38 in-lbf) 1/8
* Recommended maximum

10
5.0 SEAL INSTALLATION
8
11
14
9
12
15
Apply a thin film of grease to both split
surfaces of one stationary face half.
Bring the bottom gland half into position
by lightly contacting the angled surface on
the gland with the matching angle on the
holder till square with the shaft. Stationary
face could lightly contact the rotary face.
If possible rotate gland together with shaft
when aligning gland bolt slots with the
stuffing box bolt holes (refer to step 1).
If stationary face is clean no additional
cleaning is required. Otherwise wipe
stationary face with cleaning wipe,
ensuring that there is no debris at splits.
Bring the top gland half into position
ensuring the pins and gland bolts can be
engaged. The spring lifter extension must
contact the opposite gland split.
Install and alternately tighten stuffing box
bolts to recommended torque (refer to
Table 5 – Gland Cap Screw and Stuffing
Box Bolt Torque Values).
Position the gland splits approximately 90
degrees from the rotary holder splits.
Tighten gland cap screws to specified
torque (refer to Table 5 – Gland Cap
Screw and Stuffing Box Bolt Torque
Values). Do not rock/move gland from
side to side as this may cause disruption of
the seal face. Note: The spring lifter will
automatically move into its final position
once the gland cap screws are tightened.
Seal installation complete (refer to
EQUIPMENT STARTUP). Note: Two bolt
configuration is shown. Refer to Figure
3 - Mounting Configurations for other
bolt quantities.
10
13
16
2X
90°
2
X
Table 5 – Gland Cap Screws & Stuffing Box Bolt Torque Values
SEAL SIZE GLAND
CAP SCREWS* (Y)
HEX WRENCH
SIZE
STUFFING BOX
BOLTS** (Z)
up to 60 mm
(2.5")
14-20 Nm
(125 – 175 in-lbf) 5/16 13,5-27 Nm
(15 – 20 ft-lbf)
up to 120 mm
(4.75")
17-23 Nm
(150 – 200 in-lbf) 3/8 27-34 Nm
(20 – 25 ft-lbf)
* Recommended maximum
** Typical Values: Torque necessary to seat stuffing box gasket varies with application.
0
90
2X or 4X

11
5.0 SEAL INSTALLATION
6.0 COMMISSIONING / EQUIPMENT START UP
7.0 DECOMMISSIONING / EQUIPMENT SHUT DOWN
8.0 SPARE PARTS
5.1 442C INSTALLATION VIDEO
To view an instructional installation video, please scan the QR
Code with your mobile device or go to our web page at www.
chesterton.com/442C_Videos and click on the desired
video.
1. Rotate the shaft by hand, if possible, to ensure no metal-to-
metal contact within the seal. A slight drag may be found
due to the seal faces and the centering buttons but the shaft
should rotate freely.
2. Attach appropriate plumbing/environmental controls to
the seal. Take all necessary precautions and follow normal
safety procedures before starting the equipment.
3. Depending on how carefully the seal components were
handled during installation, split seals may drip on startup.
For example, greasy fingerprints on the faces or misaligned
face splits may cause leakage. This type of leakage usually
decreases and stops over a period of time. If the leakage
remains steady, check O-rings and gaskets for proper
installation and check the faces for chips, scratches and
proper alignment.
Please Contact Chesterton Mechanical Seal Application Engineering for
assistance regarding split seals.
Ensure that the equipment is electrically isolated. If the
equipment has been used on toxic or hazardous fluids, ensure
that the equipment is correctly decontaminated and made safe
prior to commencing work. Ensure that the pump is isolated
and check that the stuffing box is drained from any fluid and
pressure is fully released. Disassemble the 442C split seal and
remove from equipment in the reverse order from installation
instructions. Incase of disposal, ensure the local regulations
and requirements for disposal or recycling of the different
components in the seal are adhered to.
Use only Chesterton original spare parts. Use of non-original
spare parts represents risk of failure, danger to persons/
equipment and voids the product warranty.
Spare Parts Kit can be purchased from Chesterton,
referencing the recorded seal data from cover page.

12
9.0 SEAL MAINTENANCE AND REPAIR
4
7
1
5
8
2
Remove used rotary face halves by
pushing on end of face and sliding out
of rotary holder half.
Remove used holder cap screws from
holder halves.
Prepare a clean work surface for seal
disassembly and rebuild.
Remove used rotary face O-ring halves.
Remove used centering buttons from OD
of rotary holder.
Remove used rotary holder gaskets.
Remove used holder set screws (2 places)
from rotary holder.
Remove used shaft O-ring halves.
6
3
2X
6X
2X
6
2X
A correctly installed and operated mechanical seal requires little
maintenance. It is recommended to periodically check the seal
for leakage. Wearing components of a mechanical seal such as
seal faces, O-ring, etc., require replacement over time. While
a seal is installed and operating, maintenance is not possible.
Therefore it is recommended that a spare seal unit or a spare
parts kit be held in stock to allow quick repair.
1. Only the gland and rotary holder are reused. Caution: The
gland, rotary holder, face halves and O-rings are matched
pairs; do not mix halves from different seals since this will
cause seal failure.
2. The following items, in addition to wrenches, grease and
cleaning wipes, will be required for rebuild:
• Small, flat-head screwdriver or similar thin, blunt lever
(remove centering buttons; set spring lifter location)
• Plastic tipped mallet or hammer (replace
centering buttons)
• Cleaning solvent (clean elastomer/gasket surfaces)
3. Note the condition of the parts, including elastomer surfaces
and gland springs. Analyze the cause of failure and correct
the problem, if possible, before reinstalling the seal.
4. Clean all elastomer and gasket surfaces with
cleaning solvent.

13
12
15
18
9
13
16
19
10
Remove used stuffing box gasket from
gland face and all adhesive residue with
cleaning solvent
Remove used gland cap screws.
Install new holder set screws (2 places)
in rotary holder. IMPORTANT: Prior to
installing the rotary holder on the shaft/
sleeve, check to ensure the holder set
screws are not protruding beyond the
inside surface of the rotary holder.
Remove used gland gaskets from gland
grooves.
Remove used springs from gland halves
by tapping them from the gland half ID
with a small hammer
Remove all spare parts kit components
from packaging and place on the clean
work surface.
Lubricate threads with a recommended
anti seize compound and install holder
cap screws in rotary holder half.
Remove used spring retainers from gland
halves. NOTE: When last retainer is
removed the stationary seal ring can be
removed
Remove spring lifter halves from gland
halves.
Install new centering buttons on OD of
rotary holder. Important: Make sure
buttons are fully seated without deforming
the exposed heads
Apply a thin film of grease and install
shaft O-ring halves in rotary holder halves.
O-rings must protrude evenly from both
holder half ends. (Ref. CAD image on
page 8).
Remove used stationary face O-ring.
14
17
20
11
2X6X
2X
2X2X
2X2X
9.0 SEAL MAINTENANCE AND REPAIR cont.
2X
2X

14
24
27
21
25
28
30
22
Apply a thin film of grease and install
holder half gaskets (1 per holder half).
Bring gland halves together. After peeling
off protective backing, seat one gasket
half in the gland recess ensuring that cut
end aligns with gasket guide. Seat second
gasket half into gland recess, ensuring
that it butts up to cut end of first half.
Spring lifter clips installed in gland halves.
Install rotary holder shipping spacers in
rotary holder halves.
Install installation spacers on OD of holder
halves.
Install springs into spring slots on gland.
Use a plastic tipped mallet to ensure
springs are seated into place.
Install spring lifter in gland halves such
that leading end is exposed beyond last
spring. IMPORTANT: Bent TAB on spring
lifter must be installed on the recessed
side of the gland.
Apply a thin film of grease and install
rotary face O-ring halves in rotary holder
halves.
Clean rotary face halves with cleaning
wipe.
Install spring lifter clips in gland halves.
Set spring lifter location using a flat head
screwdriver. IMPORTANT: End of spring
lifter must be aligned with edge of the
end spring. Remove all clips and retain for
re-setting lifter location.
Install rotary face halves in rotary holder
halves. Press on face to seat rotary in
holder halves.
26
29
31
23
2X
2X2X
Gasket Guide
9.0 SEAL MAINTENANCE AND REPAIR cont.
9
a
s
e
G
u
2X
6X, 8X or 10X
29a

15
2X 2X2X
2X
2
X
2X
X
X
36
32
35
37
33
Stationary face half installed in gland half.
Apply a thin film of grease to gland
gaskets and install in grooves of gland
halves. Note: Gland gaskets must be
installed on gland end where stuffing
box face gasket protrudes. Ensure that
O-rings splits are protruding evenly on
both sides.
Install new gland cap screws in gland
halves. Note: Gland cap screws are
installed in one end of each gland
half, in the ends away from the mounting
bolt slot.
Install spring retainers in gland halves,
holding the stationary seal ring half in the
gland.
Clean stationary face with cleaning wipe
to ensure there is no debris on face and
at splits.
Apply a thin film of grease to the
stationary face O-ring halves and install in
gland halves; Ensure that O-ring splits are
protruding evenly on both sides.
Spring retainer installed.
Seal components are ready for
installation. Proceed to Seal Installation
instructions.
Install stationary face halves into gland
halves.
34
34a35a
38a
9.0 SEAL MAINTENANCE AND REPAIR cont.
2X
2
X
2X
X
X
X
2X

FORM NO. EN14068 REV 1 PRINTED IN USA 03/14
860 Salem Street
Groveland, MA 01834 USA
Telephone: [phone] Fax: [phone]
www.chesterton.com
© A.W.Chesterton Company, 2014. All rights reserved.
® Registered trademark owned and licensed by
A.W.Chesterton Company in USA and other countries.
Chesterton ISO certificates available on www.chesterton.com/corporate/iso
DISTRIBUTED BY:
9.1 442C SEAL REPAIR INSTRUCTION VIDEO
To view an instructional video on how to repair the 442C,
please scan the QR Code with your mobile device or go to our
web page at www.chesterton.com/442C_Videos and click
on the desired video.
9.2 RETURNING SEALS FOR REPAIR AND
HAZARD COMMUNICATION REQUIREMENTS
Any mechanical seal returned to Chesterton that has been
in operation, must comply with our Hazard Communication
requirements. Please scan the QR Code with your mobile
device or go to our web page at www.chesterton.com/
Mechanical_Seal_Returns to obtain information required
for returning seals for repair or seal analysis.
9.0 SEAL MAINTENANCE AND REPAIR cont.