Chesterton 1810 Owner's manual

1810 Heavy-Duty Modular
Single Cartridge Seal
Installation, Operation and Rebuild Instructions
TABLE OF CONTENTS
INSTALLATION, OPERATION
and REBUILD INSTRUCTIONS
Seal Data Reference
(from Box Label)
ITEM #
SEAL
(Example: 1810 1.875 SA CB/SSC S FKM)
INSTALLATION DATE
1.0 Cautions ..................................................................... 2
1.1 General ............................................................................ 2
1.2 Label Warnings................................................................. 2
2.0 Transport and Storage ........................................... 2
3.0 Description ...........................................................2 – 6
3.1 Parts Identification ............................................................ 2
3.2 Operating Parameters ....................................................... 3
3.3 Intended Use .....................................................................3
3.4 Dimensional Data........................................................ 4 – 6
4.0 Preparation for Installation.................................... 7
4.1 Equipment........................................................................ 7
4.2 Mechanical Seal ............................................................... 8
5.0 Seal Installation........................................................ 9
6.0 Commissioning/Equipment Start-up ............... 10
7.0 Decommissioning/Equipment Shut Down ..... 10
8.0 Spare Parts.............................................................. 10
9.0 Seal Rebuild ............................................................ 11
9.1 Seal Rebuild ................................................................... 11
9.1.1 Seal Disassembly........................................... 11 – 12
9.1.2 Seal Assembly ............................................... 13 – 15
10.0 Mechanical Seal Returns and Hazard
Communication Requirements.......................... 16

2
1.1 General
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, seek 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
1.2 Label Warnings
635 SXC Synthetic, Extreme Pressure, Corrosion Resistant
Grease. Chesterton International GmbH, Am Lenzenfleck
23, D85737, Ismaning, Germany – Tel. [phone].
Contains Benzenesulfonic acid, C10-16-alkyl derivs.,
calcium salts, Sulfonic acids, petroleum, calcium salts and
Benzenesulfonic acid, mono-C16-24-alkyl derivs., calcium
salts. May produce an allergic reaction. Safety Data Sheet
available on request.
seal or any other Chesterton seal in a particular service is the
customer’s responsibility.
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.
1.0 CAUTIONS
Transport and store seals in their original packaging.
Mechanical seals contain components that may be subject to
alteration and aging. It is therefore important to observe the
following conditions for storage:
• 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.
2.0 TRANSPORT AND STORAGE
KEY
1 – Sleeve Assembly
2 – Shaft O-Ring (V)
3 – Rotary Cushion
4 – Rotary O-Ring (W)
5 – Gland
6 – Rotary Seal Ring
7 – Gasket
8 – Injector (Optional)
9 – Stationary Seal Ring
10 – Stationary O-Ring (X)
11 – Follower Assembly
12 – Lock Ring
13 – 1/4 Dog Set Screw
14 – Cup Point Set Screw (not shown)
15 – Bushing (Optional)
16 – Bushing O-Ring (Optional) (Y)
17 – Snap Ring (Optional)
18 – Centering Clip
19 – Flat Head Screw
20 – Spring
21 – Stationary Cushion
22 – Pipe Plug
23 – Drive Tube
3.0 DESCRIPTION
3.1 Parts Identification
Figure 1
1
2
4
23
3
7
5
6
89
10
12
13, 14
11
16
15
17
18
1920
21
22

3
3.2 Operating Parameters*
Pressure Limits:
1810 Seals can withstand operating pressures from vacuum
(710 mm or 28" Hg) to the maximum pressures.
25 mm – 120 mm (1.000" – 4.750") up to 40 barg (600 psig)
Standard Materials:
All Metal Parts:
316 Stainless Steel/EN 1.4401
Bronze
Springs: Alloy C-276/EN 2.4819
Rotary Face: CB; SSC; TC
Stationary Face: SSC; TC
Elastomers*: FKM, EPDM, FEPM, or FFKM
*Other materials available upon request.
Speed Limits:
25 mm – 120 mm (1.000" – 4.750") up to 25 mps (5000 FPM)
Temperature Limits:
Elastomers
To 150°C (300°F) EPDM
To 205°C (400°F) FEPM, FKM
To 260°C (500°F) FFKM
*Environmental controls may be required for the specific
application.
Limits can change depending on operating conditions, size
and seal ring material.
Consult Chesterton Mechanical Seal Application Engineering
for operating conditions outside of these published
parameters.
3.3 Intended Use
The mechanical seal is to be operated within the operating
parameters as specified. For use beyond the intended
application and/or outside the operating parameters, consult
Chesterton Mechanical Seal Application Engineering to
confirm the suitability of the mechanical seal prior to putting
the mechanical seal in operation.
3.0 DESCRIPTION cont.

44
G MIN
B MAX
P
P
P
3.0 DESCRIPTION cont.
3.4 Dimensional Data (Drawings)
Figure 2
E MIN
J
F
AC D
VW XY
G MIN
B MAX
P
P
P
FLUSH
QUENCH/
DRAIN
QUENCH/
DRAIN

5
3.0 DESCRIPTION cont.
3.4.1 Dimensional Data
METRIC - Millimeters
SHAFT
SIZE
GLAND
OD
STUFFING
BOX BORE
IB
SEAL
DIA
SB
DEPTH
OB
LENGTH
BOLT CIRCLE
BY BOLT SIZE
STUFFING
BOX TO BOLT
SURFACE
NPT SIZE
AB
MAX
C
MIN
C
MAX
D
MAX
E
MIN
F
MAX
G MIN J
MAX P
10 mm 12 mm 16 mm 20 mm
25 104 44.5 51.1 42.9 18.5 50 73.2 – – – 30.5 1/4 – 18
28 104 47.8 51.8 46.0 18.5 50 73.2 – – – 30.5 1/4 – 18
30 104 51.0 56.6 49.5 18.5 50 78.0 – – – 30.5 1/4 – 18
30 OS 127 59.4 68.1 49.5 18.5 50 90.0 – – – 30.5 1/4 – 18
32 104 49.0 58.8 47.4 18.5 50 80.1 – – – 30.5 1/4 – 18
33 111 49.0 58.8 47.4 18.5 50 80.1 81.6 – – 30.5 1/4 – 18
35 111 53.9 59.2 52.4 18.5 50 83.2 85.2 – – 30.5 1/4 – 18
38 114 57.1 62.0 55.5 18.5 50 85.8 88.6 – – 30.5 3/8 – 18
40 127 59.0 68.3 57.5 18.5 50 90.0 92.0 – – 30.5 3/8 – 18
40 OS 127 69.1 74.2 57.5 18.5 50 96.5 – – – 30.5 3/8 – 18
42 127 61.0 66.0 59.5 18.5 50 90.2 92.0 – – 30.5 3/8 – 18
43 127 62.0 68.8 60.5 18.5 50 94.0 96.0 – – 30.5 3/8 – 18
45 139 64.0 73.4 62.5 18.5 50 94.8 96.8 – – 30.5 3/8 – 18
48 139 67.0 73.8 65.5 18.5 50 95.3 97.3 – – 30.5 3/8 – 18
50 139 69.0 78.5 67.5 18.5 50 100.0 102.0 – – 30.5 3/8 – 18
50 OS 152 84.9 96.3 67.5 18.5 50 118.6 120.6 – – 30.5 3/8 – 18
53 152 73.0 87.4 71.4 18.5 50 108.3 110.3 114.3 – 30.5 3/8 – 18
55 152 74.0 83.6 72.4 18.5 50 104.5 106.5 110.5 – 30.5 3/8 – 18
58 152 79.3 91.2 77.8 18.5 50 116.2 118.2 122.2 – 30.5 3/8 – 18
60 152 79.3 91.2 77.8 18.5 50 116.2 118.2 122.2 – 30.5 3/8 – 18
60 OS 165 96.1 107.4 77.8 18.5 50 129.8 131.8 – – 30.5 3/8 – 18
65 164 85.7 100.3 84.1 18.5 50 127.4 129.4 133.4 – 30.5 3/8 – 18
70 196 95.0 111 93.0 24.0 63 – 137.0 141.0 – 41.0 1/2 – 14
75 202 101.0 119 99.0 24.0 63 – 143.0 147.0 – 41.0 1/2 – 14
80 203 106.0 122 103.0 24.0 63 – 150.0 154.0 – 41.0 1/2 – 14
85 211 111.0 128 109.0 24.0 63 – 156.5 160.5 164.0 41.0 1/2 – 14
90 215 116.0 132 114.0 24.0 63 – 160.0 164.0 168.0 41.0 1/2 – 14
95 222 121.0 137 118.0 24.0 63 – 161.0 165.0 170.0 41.0 1/2 – 14
100 228 127.0 145 125.0 24.0 63 – 168.0 172.0 177.0 41.0 1/2 – 14
110 237 137.0 154 134.0 24.0 63 – 178.0 182.0 186.0 41.0 1/2 – 14
120 267 146.0 164 144.0 24.0 63 – 191.0 195.0 198.5 41.0 1/2 – 14

6
3.0 DESCRIPTION cont.
3.4.2 Dimensional Data
INCH
SHAFT
SIZE
GLAND
OD
STUFFING
BOX BORE
IB
SEAL DIA
SB
DEPTH
OB
LENGTH
BOLT CIRCLE
BY BOLT SIZE
STUFFING
BOX TO BOLT
SURFACE
NPT SIZE
AB
MAX
C
MIN
C
MAX
D
MAX
E
MIN
F
MAX
G MIN J
MAX P
3/8" 1/2" 5/8" 3/4"
1.000 4.11 1.75 2.01 1.69 0.73 1.95 2.88 – – – 1.20 1/4 – 18
1.125 4.11 1.88 2.04 1.81 0.73 1.95 2.88 – – – 1.20 1/4 – 18
1.125 OS 4.49 2.24 2.79 1.81 0.73 1.95 3.65 – – – 1.20 1/4 – 18
1.250 4.11 2.00 2.27 1.94 0.73 1.95 3.14 – – – 1.20 1/4 – 18
1.375 4.45 2.13 2.33 2.06 0.73 1.95 3.27 3.40 – – 1.20 1/4 – 18
1.375 OS 5.39 2.72 2.92 2.06 0.73 1.95 3.78 – – – 1.20 1/4 – 18
1.500 4.50 2.25 2.44 2.19 0.73 1.95 3.40 3.53 – – 1.20 3/8 – 18
1.625 5.00 2.38 2.69 2.31 0.73 1.95 3.52 3.64 – – 1.20 3/8 – 18
1.750 5.50 2.50 2.81 2.44 0.73 1.95 3.62 3.75 – – 1.20 3/8 – 18
1.750 OS 6.65 3.20 3.73 2.44 0.73 1.95 4.59 4.72 – – 1.20 3/8 – 18
1.875 5.50 2.63 2.94 2.56 0.73 1.95 3.75 3.88 – – 1.20 3/8 – 18
1.875 OS 5.99 3.41 3.79 2.56 0.73 1.95 4.65 4.78 – – 1.20 3/8 – 18
2.000 5.50 2.75 3.19 2.69 0.73 1.95 4.13 4.27 – – 1.20 3/8 – 18
2.125 6.00 2.88 3.44 2.81 0.73 1.95 4.25 4.38 4.50 – 1.20 3/8 – 18
2.125 OS 6.99 3.70 4.23 2.81 0.73 1.95 5.09 5.22 5.34 – 1.20 3/8 – 18
2.250 6.00 3.00 3.56 2.94 0.73 1.95 4.37 4.50 4.62 – 1.20 3/8 – 18
2.375 6.00 3.13 3.59 3.06 0.73 1.95 4.56 4.75 4.82 – 1.20 3/8 – 18
2.375 OS 8.39 3.93 4.48 3.06 0.73 1.95 5.34 5.47 5.59 – 1.20 3/8 – 18
2.500 6.50 3.25 3.81 3.19 0.73 1.95 4.62 4.75 4.87 – 1.20 3/8 – 18
2.500 OS 7.76 3.93 5.23 3.19 0.73 1.95 6.09 6.22 6.34 – 1.20 3/8 – 18
2.625 6.50 3.38 3.95 3.31 0.73 1.95 5.00 5.13 5.26 – 1.20 3/8 – 18
2.625 OS 6.98 4.30 4.76 3.31 0.73 1.95 5.62 5.75 5.87 – 1.20 3/8 – 18
2.750 7.70 3.76 4.38 3.67 0.94 2.48 – 5.42 5.54 – 1.63 1/2 – 14
2.750 OS 7.89 4.45 4.76 3.67 0.94 2.48 – 5.75 5.87 6.00 1.63 1/2 – 14
2.875 7.83 3.88 4.50 3.79 0.94 2.48 – 5.61 5.73 – 1.63 1/2 – 14
3.000 7.94 4.00 4.69 3.91 0.94 2.48 – 5.65 5.77 – 1.63 1/2 – 14
3.000 OS 8.64 4.92 5.37 3.91 0.94 2.48 – 6.36 6.48 6.61 1.63 1/2 – 14
3.125 7.99 4.13 4.80 4.04 0.94 2.48 – 5.80 5.92 – 1.63 1/2 – 14
3.250 8.19 4.25 4.94 4.16 0.94 2.48 – 6.07 6.19 – 1.63 1/2 – 14
3.375 8.30 4.38 5.05 4.29 0.94 2.48 – 6.19 6.32 6.44 1.63 1/2 – 14
3.375 OS 8.39 4.95 5.26 4.29 0.94 2.48 – 6.23 6.35 6.48 1.63 1/2 – 14
3.500 8.44 4.50 5.19 4.41 0.94 2.48 – 6.18 6.31 6.43 1.63 1/2 – 14
3.625 8.49 4.63 5.25 4.54 0.94 2.48 – 6.42 6.54 6.67 1.63 1/2 – 14
3.750 8.71 4.75 5.39 4.66 0.94 2.48 – 6.38 6.51 6.63 1.63 1/2 – 14
3.750 OS 9.76 5.95 6.38 4.66 0.94 2.48 – 7.37 7.49 7.61 1.63 1/2 – 14
3.875 8.84 4.88 5.51 4.79 0.94 2.48 – 6.62 6.74 6.87 1.63 1/2 – 14
4.000 8.96 5.00 5.69 4.91 0.94 2.48 – 6.65 6.78 6.90 1.63 1/2 – 14
4.125 8.99 5.13 5.80 5.04 0.94 2.48 – 6.77 6.90 7.02 1.63 1/2 – 14
4.125 OS 9.76 5.95 6.26 5.04 0.94 2.48 – 7.23 7.35 7.48 1.63 1/2 – 14
4.250 8.99 5.25 5.94 5.16 0.94 2.48 – 7.06 7.19 7.31 1.63 1/2 – 14
4.375 9.33 5.38 6.06 5.29 0.94 2.48 – 7.02 7.15 7.27 1.63 1/2 – 14
4.500 9.49 5.50 6.19 5.41 0.94 2.48 – 7.17 7.30 7.42 1.63 1/2 – 14
4.500 OS 12.49 6.73 7.49 5.41 0.94 2.48 – 8.46 8.58 8.71 1.63 1/2 – 14
4.625 9.49 5.63 6.31 5.54 0.94 2.48 – 7.45 7.57 7.70 1.63 1/2 – 14
4.750 10.49 5.75 6.47 5.66 0.94 2.48 – 7.55 7.68 7.80 1.63 1/2 – 14
4.750 OS 11.39 7.20 7.63 5.66 0.94 2.48 – 8.62 8.74 8.87 1.63 1/2 – 14

7
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 1,1 micron (45 microinch) Ra finish.
Make sure the shaft or sleeve diameter is within 0,05 mm
(.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 mm (.001 in 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
(.005 in 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 1,1 micron (45
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 its entire length.
4.0 PREPARATION FOR INSTALLATION
4.1 Equipment
2
ø
200
≤
ø
125 µ"
3,2 µm
≤0.005"
0,13 mm
1
32 µ"
0,8 µmRa
≤
0.002"
0,05 mm
±
ø
3
ø
1000
≤
ø
4

88
3. Centering clips have been preset at the factory. If for any
reason you loosen or remove the centering clip flat head
screws, retighten as follows prior to installing the seal on
the equipment: Tighten the flat head screw finger tight,
ensuring the centering clips are properly engaged. Then
using a hex key, tighten flat head screw an additional 1/8
turn. This will approximate the 4,5 Nm (40 inch-pounds) of
torque for sizes 25 mm – 65 mm (1.000" – 2.650"), 7,8 Nm
(70 inch-pounds) of torque for 70 mm – 120 mm (2.750" –
4.750") set at the factory.
4. IMPORTANT: When seal is purchased without the bushing
option the quench and drain ports will be plugged.
DO NOT remove these plugs or attempt to use the quench/
drain environmental controls without the bushing option.
5. With Injector option (distributed flush) seals require
environmental controls (API Plan 11 or equivalent) connected
to “F” port.
4.2 Mechanical Seal
1. Check to ensure that the O-Rings installed in this seal are
compatible with the fluid being sealed.
2. The 1/4 dog set screws go into the smaller holes in the
sleeve. The dimples on the outside diameter of the lock
ring indicate the position of the 1/4 dog set screws. Do not
disengage these screws from the sleeve when positioning
the seal. The cup point set screws go through the larger
holes in the sleeve. Make sure all screws are engaged in the
sleeve but do not protrude into the inside diameter bore.
Also, when repositioning or removing the seal, make sure the
centering clips and flat head screws are engaged.
4.0 PREPARATION FOR INSTALLATION cont.

9
5.0 SEAL INSTALLATION
1 2 3
Apply a thin film of white grease to the
shaft/O-Ring (V) and slide seal onto the shaft
by pushing on the gland. CAUTION: Ensure
that all set screws are engaged through the
sleeve but do not protrude into the sleeve
inside diameter bore.
Tighten three 1/4 dog set screws
1
(see inset
image, marked with a dimple) evenly with the hex
key provided.
6
5
IMPORTANT: 1/4 dog set screws
1
must be
tightened FIRST and cup point set screws
2
must be tightened last. 1/4 dog set screw
locations are marked with a dimple on the
outside diameter of the lock ring, next to the
screw holes.
7
Tighten cup point set screws
2
evenly with
the hex key provided. IMPORTANT: After all
sets screws have been tightened by hand,
retighten with a torque wrench:
Sizes 25 mm – 65 mm (1.000" – 2.625")
to 5,5 – 6,5 Nm (50 – 60 in-lbs.)
Sizes 70 mm – 120 mm (2.750" – 4.750")
to 12 – 13 Nm (105 – 115 in-lbs.)
Remove all flat head screws and centering clips
and retain for future use when making impeller
adjustments and/or seal removal.
8 9
IMPORTANT: To ensure that the gland is
properly centered over the sleeve turn the
shaft by hand and make sure the seal turns
freely. If you hear/feel metal to metal contact
within the seal, it was improperly centered.
Re-install the centering clips finger tight.
Remove any piping connections. Loosen
the gland bolts. Fully tighten clips. Loosen
the set screws. Re-tighten the gland bolts.
Re-tighten the set screws. Remove the clips.
If metal to metal contact still exists check the
centering of the stuffing box.
4
Tighten the gland bolts evenly. IMPORTANT:
The gland bolts must be tightened before
tightening the set screws onto the shaft.
Gland bolt torque is dependent on
application. IMPORTANT: Piping connections
should not be made prior to tightening the
gland bolts.
Tools required for installation: Hex key and white
grease (supplied with seal); open end or socket
wrench (size dependent on mounting bolt size;
supplied by customer). IMPORTANT: Seal
data can be accessed from the installed RFID
tag; you may also choose to fill in seal data
reference from the box label on the cover
page of these instructions.
Reassemble the pump and make necessary
shaft alignments and impeller adjustments.
The impeller can be reset at any time, as long
as the centering clips are in place and the
seal set screws are loosened while the shaft
is being moved. (see Figures 4 and 5) for port
orientation. CAUTION: See (4.2.3 Preparation
for Installation – Mechanical Seal step 3.)
2
1
1
2
2

10
6.0 COMMISSIONING / EQUIPMENT START-UP
6.1 Attach appropriate environmental controls to the seal. (see Figure 3 and 4)
6.2 Take all necessary precautions and follow normal safety procedures before starting
the equipment
*Please contact Chesterton Mechanical Seal Application Engineering for assistance regarding cartridge seals.
Figure 3
No Bushing Option
Preferred Orientation for Flush Only
Port “F” Connect Here
Ports are Plugged
DO NOT remove pipe plugs
Figure 4
Bushing Option Included
Preferred Orientation for Quench/Drain and Flush
Quench “Q/D” Port Only
Drain “Q/D” Port Only
7.0 DECOMMISSIONING / EQUIPMENT SHUT DOWN
8.0 SPARE PARTS
pressure is fully released. IMPORTANT: Replace centering
clips prior to seal removal from equipment! Remove the
seal from equipment in the reverse order from installation
instructions. In case of disposal, ensure the local regulations
and requirements for disposal or recycling of the different
components in the seal are adhered to.
Spare Parts Kit can be purchased from Chesterton,
referencing the (as manufactured) seal data from the installed
RFID tag or from recorded data on the cover page of these
instructions.
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
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.
Flush
Port
“F”
Connect
Here if
Required

11
9.1.1 Seal Disas sembly
9.0 SEAL REBUILD
9.1 Seal Rebuild
1 2
Tools required for disassembly of seal: Hex key
(supplied with seal); tweezers and a curved
pick (supplied by customer; for removal of
O-Rings and drive tube).
Remove the centering clips and discard.
Remove the lock ring from sleeve and set aside.
45
Separate the sleeve from the gland and set the
sleeve aside.
8
Remove the follower assembly from the gland
and set it aside.
9
Remove all springs from the gland spring holes
and discard.
6
Remove the stationary seal ring from the gland
and discard.
Remove the O-Ring (X) from the gland O-Ring
groove and discard.
7
3
Remove all cup point and 1/4 dog set screws
from the lock ring and discard.
A correctly installed and operated mechanical seal requires little
maintenance. It is recommended to periodically check the seal
for leakage. Some components of a mechanical seal such as seal
faces, O-Rings, 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 / bushing
kit be held in stock to allow quick repair.
1. 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.
2. Clean all elastomer and gasket surfaces with an approved
cleaning solvent that complies with local and site regulations.

12
9.0 SEAL REBUILD cont.
9.1.1 Seal Disassembly cont.
11
For seals with Bushing kit: Remove the snap
ring from the gland and discard.
For seals with Bushing kit: Remove the
bushing and bushing O-Ring (Y) from the gland
bore and discard.
12
Remove the stuffing box face gasket from the
gland and discard.
13
Remove the shaft O-Ring (V) from the sleeve
and discard.
16
14
Remove rotary seal ring from sleeve and discard.
13
15
Remove drive from drive lugs in the sleeve
and discard.
10
For seals with Injector option: Carefully remove
the injector, and set it aside.

9.0 SEAL REBUILD cont.
9.1.2 Seal Assembly
13
1
Tools required for assembly of seal: Hex key
and two types of grease (supplied with seal);
lint-free cloth, tweezers or a thin pick (supplied
by customer; for installation of O-Rings and
drive tube). Clean all metal components with
an approved solvent, including all gasket and
O-Ring surfaces. Place metal components
and all spare seal components on a clean dry
surface.
3
Apply a thin film of white grease to the rotary
O-Ring (W) and install into the groove on
the outer diameter of the rotary face. Ensure
cushions are on the back of the rotary face.
Align the mark on the rotary face with the notch
on the sleeve. Slide the rotary face down to the
sleeve and gently compress until it is seated.
The sleeve drive lugs should engage the slots on
the rotary face. CAUTION: Do not compress
drive tube.
46
For seals with Bushing kit: Apply a thin film of
white grease to the O-Ring (Y) and install into
the groove on the bronze bushing. IMPORTANT:
Ensure the O-Ring is completely seated and
fully captured within the O-Ring groove.
The O-Ring may appear to be oversize when
installing and will need to be worked in.
8
For seals with Bushing kit: Install the snap ring
on top of the bushing and into the groove in the
gland to secure the bushing into the gland.
For seals with Bushing kit: Install the bushing
into the counter bore of the gland with the
bushing O-Ring (Y) facing downward.
7
5
Clean the rotary face with an approved solvent
and a lint-free cloth.
2
Pick up the drive tube (use tweezers if
necessary) and install onto each of the lugs in
the follower assembly. Ensure the drive tube are
fully seated on the lugs.
9
For seals with Injector option: Invert the gland.
Compress and overlap the ends of the injector,
position the splits opposite the F (flush) port and
install in the gland groove. IMPORTANT: The
injector should snap into place. Ensure the
split ends do not overlap when fully installed;
make adjustments until the ends meet.

14
18
Lift up on the gland and hold the bottom of the
sleeve to invert and gently set down to initiate
contact between the stationary and rotary faces.
Install the ¼ dog set screws
1
into the screw
holes marked with a dimple on the outside
diameter of the lock ring. Install the cup point
set screws
2
into the remaining holes in the
lock ring. IMPORTANT: The screws should not
protrude into the inner diameter of the lock
ring prior to installing onto the seal sleeve.
17
16
2
1
1
2
2
11
Dip the ends of the springs into white grease
and insert into each spring hole. IMPORTANT:
DO NOT insert springs into the four (two)
evenly spaced holes marked by dimples and
previously filled with 635 SXC grease.
12
Align the pins on the follower plate with the
marked, 635 SXC grease filled holes in the
gland and press down the plate into the gland
until the follower plate rests on the springs.
17
Invert the sleeve assembly and insert it into the
gland bore.
15
Align the slots on the stationary face with the
lugs on the follower plate and gently compress
the stationary face down until it is fully seated.
CAUTION: Improper alignment will result in
chipping at the slot edges of the face. Clean
the stationary face with a lint-free cloth and an
approved cleaning solvent that complies with
local and site regulations.
Apply a thin film of white grease to the stationary
face O-Ring (X) and install into the groove in the
gland above the follower plate assembly.
13
9.0 SEAL REBUILD cont.
9.1.2 Seal Assembly cont.
Fill the four (or two, based on the seal size)
evenly spaced holes, marked by dimples, with
the 635 SXC grease supplied with the seal.
Wipe off excess grease. Helpful Hint: Use
the follower plate as a guide to confirm that
grease will be applied to the correct holes.
10
14
Ensure the stationary cushions are properly
installed, with the overhanging section at the
break-edges folded onto the sides of the slots.
Correct Incorrect

9.0 SEAL REBUILD cont.
9.1.2 Seal Assembly cont.
15
24
Place the lock ring on top of the sleeve and align
the three vertical dimples on the outer diameter
of the lock ring with the notch on the top edge of
the sleeve.
19
23
Apply a thin film of white grease to the shaft
O-Ring (V) and install on the sleeve inside
diameter O-Ring groove.
Peel off the adhesive backing from the gland
gasket and install in the gland gasket recess.
Press down on the top of the gland to compress
the assembly and turn each centering clip to
engage the groove on the top of the gland and
hand-tight the centering clip flat head screw.
Repeat this step for all centering clips. Retighten
with a torque wrench:
Sizes 25 mm – 65 mm (1.000" – 2.625")
to 5,5 – 6,5 Nm (50 – 60 in-lbs.),
4,5 Nm (40 in-lbs.)
Sizes 70 mm – 120 mm (2.750" – 4.750")
to 12 – 13 Nm (105 – 115 in-lbs.),
7,8 Nm (70 in-lbs.).
22
21
Install the centering clips on the outer diameter
of the lock ring with the centering clip flat head
screws.
20
Gently press down on the top of the lock ring and
tighten the 1/4 dog set screws and then the cup
point screws with the hex key supplied with the
seal. IMPORTANT: The set screws should be
tightened just enough to ensure that they are
secure but should not protrude into the inner
diameter of the sleeve.
The seal is ready for installation.

FORM NO. EN393586 REV 1 06/19
860 Salem Street
Groveland, MA 01834 USA
Telephone: [phone] Fax: [phone]
chesterton.com
© 2019 A.W. Chesterton Company.
® Registered trademark owned by A.W. Chesterton Company
in USA and other countries.
Chesterton ISO certificates available on chesterton.com/corporate/iso
DISTRIBUTED BY:
Any mechanical seal returned to Chesterton that has
been in operation, must comply with our Hazard
Communication requirements. Please go to our web page at
chesterton.com/Mechanical_Seal_Returns
to obtain information required for returning seals for repair
or seal analysis.
10.0 MECHANICAL SEAL RETURNS AND HAZARD COMMUNICATION REQUIREMENTS