CHESTERTON 2810 Heavy Duty Modular Double Cartridge Seal Instruction Manual

INSTALLATION, OPERATION
and REBUILD INSTRUCTIONS
2810 Heavy-Duty Modular
Double Cartridge Seal
Installation, Operation and Rebuild Instructions

Seal Data Reference
(from Box Label)
ITEM #
SEAL
(Example: 2810 1.875 SA CB/SSC S FKM)
INSTALLATION DATE_____

CAUTIONS

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 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.

TRANSPORT AND STORAGE

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.

DESCRIPTION

3.1 Parts Identification

KEY

**3.2 Operating Parameters***
Pressure Limits:
2810 Seals can withstand operating pressures from vacuum (710 mm or 28″ Hg) to the maximum pressures.
Process Pressure:
25 mm – 120 mm (1.000″ – 4.750″) up to 40 barg (600 psig)
Barrier Pressure:
25 mm – 65 mm (1.000″ – 2.625″) up to 17 barg (250 psig)
70 mm – 120 mm (2.750″ – 4.750″) up to 14 barg (200 psig)
Maintain process pressure at no more than 4 barg (50psig) below barrier pressure
2 barg (30psig) minimum barrier pressure

Standard Materials:
All Metal Parts:
316 Stainless Steel/EN 1.4401
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 are 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.

3.4 Dimensional Data (Drawings)

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

---|---|---|---|---|---|---|---|---
A| B MAX| C MIN| C MAX| D MAX| E MIN| F MAX| G MIN| J MAX| P
10 mm| 12 mm| 16 mm| 20 mm
25mm| 104.0| 44.2| 51.3| 42.7| 40.1| 54.1| 72.7| –| –| –| 28.7| 1/4 – 18
28mm| 104.0| 47.2| 52.1| 45.7| 40.1| 54.1| 72.7| –| –| –| 28.7| 1/4 – 18
30mm| 104.0| 49.3| 56.9| 47.8| 40.1| 54.1| 77.6| –| –| –| 28.7| 1/4 – 18
30mm OS| 126.6| 59.4| 68.1| 47.6| 40.1| 53.8| 90.0| –| –| –| 28.7| 1/4 – 18
32mm| 110.7| 51.1| 57.9| 49.8| 40.1| 54.1| 79.8| –| –| –| 28.7| 1/4 – 18
33mm| 110.7| 52.1| 58.9| 50.8| 40.1| 54.1| 79.3| 81.3| –| –| 28.7| 1/4 – 18
35mm| 110.7| 54.1| 59.4| 52.6| 40.1| 54.1| 82.9| 84.9| –| –| 28.7| 1/4 – 18
38mm| 113.9| 57.2| 62.2| 55.9| 40.1| 54.1| 86.3| 88.3| –| –| 28.7| 3/8 – 18
40mm| 126.6| 59.2| 68.6| 57.7| 40.1| 54.1| 89.7| 91.7| –| –| 28.7| 3/8 – 18
40mm OS| 126.6| 69.3| 74.3| 57.6| 40.1| 53.8| 96.5| –| –| –| 28.7| 3/8 – 18
42mm| 126.6| 61.2| 68.6| 59.7| 40.1| 54.1| 89.7| 91.7| –| –| 28.7| 3/8 – 18
43mm| 126.6| 62.2| 69.1| 60.7| 40.1| 54.1| 93.7| 95.7| –| –| 28.7| 3/8 – 18
45mm| 139.0| 64.3| 73.7| 62.7| 40.1| 54.1| 94.5| 96.5| –| –| 28.7| 3/8 – 18
48mm| 139.0| 67.1| 74.2| 65.8| 40.1| 54.1| 95.0| 97.0| –| –| 28.7| 3/8 – 18
50mm| 139.0| 69.1| 78.7| 67.8| 40.1| 54.1| 99.7| 101.7| –| –| 28.7| 3/8 – 18
50mm OS| 152.0| 85.2| 94.1| 67.6| 40.1| 53.8| 118.6| 120.6| –| –| 28.7| 3/8 – 18
53mm| 152.0| 72.1| 87.6| 71.6| 40.1| 54.1| 108.0| 110.0| 114.0| –| 28.7| 3/8 – 18
55mm| 152.0| 74.2| 81.3| 72.6| 40.1| 54.1| 104.2| 106.2| 110.2| –| 28.7| 3/8 – 18
58mm| 152.0| 77.2| 92.2| 78.0| 40.1| 54.1| 115.9| 117.9| 121.9| –| 28.7| 3/8 – 18
60mm| 152.0| 79.2| 92.2| 78.0| 40.1| 54.1| 115.9| 117.9| 121.9| –| 28.7| 3/8 – 18
60mm OS| 164.7| 96.2| 107.5| 77.9| 40.1| 53.8| 129.8| 131.8| –| –| 28.7| 3/8 – 18
65mm| 163.8| 84.1| 100.3| 84.3| 40.1| 54.1| 127.1| 129.1| 133.1| –| 28.7| 3/8 – 18
70mm| 195.8| 95.5| 113.0| 93.5| 52.1| 63.5| –| 136.9| 140.9| –| 34.0| 1/2 – 14
75mm| 201.7| 100.6| 119.4| 99.6| 52.1| 63.5| –| 142.7| 146.7| –| 34.0| 1/2 – 14
80mm| 202.9| 105.4| 122.4| 103.4| 52.1| 63.5| –| 149.8| 153.8| –| 34.0| 1/2 – 14
85mm| 211.1| 110.5| 128.8| 109.0| 52.1| 63.5| –| 152.1| 156.1| 160.1| 34.0| 1/2 – 14
90mm| 214.4| 115.6| 132.1| 113.3| 52.1| 63.5| –| 159.6| 163.6| 167.6| 34.0| 1/2 – 14
95mm| 221.5| 120.4| 138.4| 118.6| 52.1| 63.5| –| 161.4| 165.4| 169.4| 34.0| 1/2 – 14
100mm| 227.6| 125.5| 144.8| 125.0| 52.1| 63.5| –| 168.3| 172.3| 176.3| 34.0| 1/2 – 14
110mm| 237.2| 135.6| 154.2| 134.4| 52.1| 63.5| –| 177.7| 181.7| 185.7| 34.0| 1/2 – 14
120mm| 266.4| 145.5| 163.8| 144.0| 52.1| 63.5| –| 187.3| 191.3| 195.3| 34.0| 1/2 – 14
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

---|---|---|---|---|---|---|---|---
A| B 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| 4.09| 1.75| 2.02| 1.70| 1.58| 2.13| 2.87| –| –| –| 1.13| 1/4 – 18
1.125| 4.09| 1.88| 2.05| 1.82| 1.58| 2.13| 2.87| –| –| –| 1.13| 1/4 – 18
1.125 OS| 4.49| 2.61| 2.92| 1.82| 1.58| 2.12| 3.77| –| –| –| 1.13| 1/4 – 18
1.250| 4.09| 2.00| 2.28| 1.95| 1.58| 2.13| 3.14| –| –| –| 1.13| 1/4 – 18
1.375| 4.36| 2.13| 2.34| 2.07| 1.58| 2.12| 3.26| 3.38| –| –| 1.13| 1/4 – 18
1.375 OS| 5.39| 2.73| 2.92| 2.06| 1.58| 2.12| 3.78| –| –| –| 1.13| 1/4 – 18
1.500| 4.49| 2.25| 2.45| 2.20| 1.58| 2.13| 3.39| 3.52| –| –| 1.13| 1/4 – 18
1.625| 4.99| 2.38| 2.70| 2.32| 1.58| 2.13| 3.50| 3.63| –| –| 1.13| 3/8 – 18
1.750| 5.47| 2.50| 2.82| 2.45| 1.58| 2.13| 3.62| 3.74| –| –| 1.13| 3/8 – 18
1.750 OS| 6.65| 3.48| 3.73| 2.44| 1.58| 2.12| 4.59| 4.72| –| –| 1.13| 3/8 – 18
1.875| 5.47| 2.63| 2.95| 2.57| 1.58| 2.13| 3.74| 3.87| –| –| 1.13| 3/8 – 18
1.875 OS| 5.99| 3.53| 3.79| 2.56| 1.58| 2.12| 4.65| 4.78| –| –| 1.13| 3/8 – 18
2.000| 5.47| 2.75| 3.20| 2.70| 1.58| 2.13| 4.13| 4.25| –| –| 1.13| 3/8 – 18
2.125| 5.99| 2.88| 3.45| 2.82| 1.58| 2.13| 4.25| 4.37| 4.50| –| 1.13| 3/8 – 18
2.125 OS| 6.99| 3.86| 4.23| 2.81| 1.58| 2.12| 5.09| 5.22| 5.34| –| 1.13| 3/8 – 18
2.250| 5.99| 3.00| 3.47| 2.95| 1.58| 2.13| 4.37| 4.49| 4.62| –| 1.13| 3/8 – 18
2.375| 5.99| 3.13| 3.63| 3.07| 1.58| 2.13| 4.56| 4.68| 4.81| –| 1.13| 3/8 – 18
2.375 OS| 8.39| 4.11| 4.48| 3.06| 1.58| 2.12| 5.34| 5.47| 5.59| –| 1.13| 3/8 – 18
2.500| 6.45| 3.25| 3.82| 3.20| 1.58| 2.13| 4.62| 4.74| 4.87| –| 1.13| 3/8 – 18
2.500 OS| 7.76| 4.48| 5.23| 3.19| 1.58| 2.12| 6.09| 6.22| 6.34| –| 1.13| 3/8 – 18
2.625| 6.45| 3.38| 3.95| 3.32| 1.58| 2.13| 5.00| 5.12| 5.25| –| 1.13| 3/8 – 18
2.625 OS| 6.98| 4.55| 4.76| 3.31| 1.58| 2.12| 5.62| 5.75| 5.87| –| 1.13| 3/8 – 18
2.750| 7.71| 3.75| 4.45| 3.68| 2.05| 2.50| –| 5.42| 5.55| –| 1.35| 1/2 – 14
2.750 OS| 7.89| 4.45| 4.76| 3.67| 2.05| 2.50| –| 5.84| 5.97| 6.09| 1.35| 1/2 – 14
2.875| 7.83| 3.88| 4.57| 3.79| 2.05| 2.50| –| 5.50| 5.63| –| 1.35| 1/2 – 14
3.000| 7.94| 4.00| 4.70| 3.92| 2.05| 2.50| –| 5.65| 5.78| –| 1.35| 1/2 – 14
3.000 OS| 8.64| 4.92| 5.37| 3.92| 2.05| 2.50| –| 6.45| 6.58| 6.70| 1.35| 1/2 – 14
3.125| 7.99| 4.13| 4.82| 4.04| 2.05| 2.50| –| 5.80| 5.93| –| 1.35| 1/2 – 14
3.250| 8.19| 4.25| 4.95| 4.17| 2.05| 2.50| –| 5.93| 6.06| –| 1.35| 1/2 – 14
3.375| 8.31| 4.38| 5.07| 4.29| 2.05| 2.50| –| 6.02| 6.14| 6.27| 1.35| 1/2 – 14
3.375 OS| 8.39| 4.95| 5.26| 4.29| 2.05| 2.50| –| 6.33| 6.45| 6.58| 1.35| 1/2 – 14
3.500| 8.44| 4.50| 5.20| 4.42| 2.05| 2.50| –| 6.18| 6.31| 6.43| 1.35| 1/2 – 14
3.625| 8.49| 4.63| 5.32| 4.54| 2.05| 2.50| –| 6.31| 6.44| 6.56| 1.35| 1/2 – 14
3.750| 8.72| 4.75| 5.45| 4.67| 2.05| 2.50| –| 6.38| 6.51| 6.63| 1.35| 1/2 – 14
3.750 OS| 9.76| 5.95| 6.38| 4.67| 2.05| 2.50| –| 7.46| 7.59| –| 1.35| 1/2 – 14
3.875| 8.84| 4.88| 5.57| 4.79| 2.05| 2.50| –| 6.52| 6.64| 6.77| 1.35| 1/2 – 14
4.000| 8.96| 5.00| 5.70| 4.92| 2.05| 2.50| –| 6.66| 6.78| 6.91| 1.35| 1/2 – 14
4.125| 8.99| 5.13| 5.82| 5.04| 2.05| 2.50| –| 6.78| 6.90| 7.03| 1.35| 1/2 – 14
4.125 OS| 9.76| 5.95| 6.26| 5.04| 2.05| 2.50| –| 7.33| 7.45| 7.58| 1.35| 1/2 – 14
4.250| 8.99| 5.25| 5.95| 5.17| 2.05| 2.50| –| 6.91| 7.04| 7.16| 1.35| 1/2 – 14
4.375| 9.34| 5.38| 6.07| 5.29| 2.05| 2.50| –| 7.03| 7.15| 7.28| 1.35| 1/2 – 14
4.500| 9.49| 5.50| 6.20| 5.42| 2.05| 2.50| –| 7.18| 7.30| 7.43| 1.35| 1/2 – 14
4.500 OS| 12.49| 6.73| 7.49| 5.42| 2.05| 2.50| –| 8.56| 8.68| 8.81| 1.35| 1/2 – 14
4.625| 9.49| 5.63| 6.32| 5.54| 2.05| 2.50| –| 7.28| 7.40| 7.53| 1.35| 1/2 – 14
4.750| 10.49| 5.75| 6.45| 5.67| 2.05| 2.50| –| 7.40| 7.53| 7.65| 1.35| 1/2 – 14
4.750 OS| 11.39| 7.20| 7.63| 5.67| 2.05| 2.50| –| 8.71| 8.84| 8.96| 1.35| 1/2 – 14

PREPARATION FOR INSTALLATION

4.1 Equipment

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″).| 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.

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.

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.

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.

SEAL INSTALLATION

Tools required for installation: Hex key and
grease (supplied with seal). Open end or
socket/torque wrench (size dependent on
mounting bolt size; supplied by customer).
IMPORTANT: As manufactured 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. Remove plastic from fluid ports
(not shown).| Apply a thin film of 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.| 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 Figure 4) for port orientation.
CAUTION: See (4.2.3 Preparation for
Installation – Mechanical Seal step 3.)

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.| 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.| Tighten three 1/4 dog set screws 1 (see inset
image, marked with a dimple) evenly with the hex
key provided.

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.| 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.

COMMISSIONING/EQUIPMENT START-UP

6.1 Attach appropriate environmental controls to the seal. (see Figure 3)
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.

DECOMMISSIONING/EQUIPMENT SHUT DOWN

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. 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

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 (as manufactured) seal data from the installed RFID tag or from recorded data on the cover page of these instructions.

SEAL REBUILD

9.1 Seal Rebuild
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 rings, 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 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.

9.1.1 Seal Disassembly

Tools required for disassembly o
f 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 all cup point and 1/4 dog set  screws from the lock  ring and discard.

Remove the lock ring from sleeve and set aside.| Remove the follower assembly. Remove the  drivetube and discard. Set aside  follower assembly.| Remove outboard rotary seal ring and discard.

Separate gland assembly from sleeve assemblyand set aside.| Remove the inboard stationary seal  ring from the sleeve and discard.| Remove the inboard rotary seal ring from the
sleeve and discard.

Remove the lock ring from sleeve and set aside| Remove the follower assembly. Remove the drive tube and discard. Set aside follower assembly.| Remove outboard rotary seal ring and discard.

Separate gland assembly from sleeve assemblyand set aside.| Remove the inboard stationary seal ring from the
sleeve and discard.| Remove the inboard rotary seal  ring from the sleeve and discard.

Remove the shaft O-Ring (V) from sleeve and discard.| Remove the drive tube from the sleeve drive lugs
and discard.| Remove all springs from the lock ring and discard.

Remove the drive channel from gland; remove the channel clips and the flow deflector from the channel and discard.| Remove the drive assembly from the gland and discard.|

9.1.2 Seal Assembly

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.| Pick up the drive tubes with tweezers or a thin
pick and install onto each of the lugs in the
sleeve counter bore. Ensure the drive tube is fully
seated on the lug (it will bottom out).| 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.
IMPORTANT: rotary seal ring in the bag
marked ROTARY INBOARD MUST be installed
on the sleeve (see step 4).

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.| Insert the drive assembly  into the gland pin hole. Ensure all surfaces are clean  and free of debris.| Apply a thin film of grease to the drive channel clip and drive channel flow  deflector. Install the drive channel flow  deflector in the slot between the two cutaways. Install the drive  channel clip(s) in the  remaining slot(s). NOTE: Seal sizes
25 mm – 65 mm (1.000″ – 2.625″) use 1 clip;
70 mm – 120 mm (2.750″ – 4.750″) use 3 clips.

Insert the drive channel assembly into the gland,
with open drive slots facing down, engaging
the flow deflector into the drive assembly antirotation lug, the dimple on the gland will align with the mark on the outside of the drive channel.| Apply a thin film of grease  to the adapter O-ring (Z) and install on  outside diameter of adapter plate.| Align the adapter slots with the slots in the drive channel, engaging  assembly and seat the adapter plate. IMPORTANT: Adapter surface
must be below gland surface to be fully seated  and installed.

Apply a thin film of grease to the stationary
O-Ring (X) and install in the inside diameter
groove in the adapter.| Align the slots in one stationary seal ring with the anti-rotation  channel clips and flow deflector,  and  carefully press into place.  Ensure that the seal ring is fully  seated.| Carefully invert the gland and place on a clean
cloth to protect the inboard sealing surface.
Apply a thin film of grease to the remaining
stationary O-Ring (X) and install in the inside
diameter groove in the gland.

Align the slots in the remaining stationary seal ring with the anti-rotation channel clips  and flow deflector and carefully press into  place. Ensure that the seal ring is fully seated.| 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 set screws should not
protrude into the inner diameter of the lock ring prior to installing onto the seal sleeve.

Apply a thin film of grease to the lock ring O-Ring (Y) and insert it into the inside diameter lock ring groove.| Apply a small amount of grease to  one end of each spring and insert  into the unmarked holesin the lock  ring. CAUTION: DO NOT install  springs into the marked holes intended for the follower plate pins.| 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.

Align the pins in the follower assembly with themarked holes in the lock ring and press to seatinto position.| Apply a thin film of grease to the rotary O-Ring (W) and install it into  the groove on the outside diameter of  the outboard rotary seal ring.| Align the drive slots in the rotary seal ring with the follower lugs; press gently on the  rotary seal ring to seat into position in the  lock ring. CAUTION: Do not compress drive tube.

Clean all seal face surfaces with a clean cloth
and approved solvent prior to final assembly
of components.| Place the gland over the lock ring assembly, Chesterton marking facing  down, aligning the stationary seal  ring face with the rotary seal ring face.| Invert the sleeve assembly, holding around the outside diameter of the rotary seal ring,  and slide it into the gland and lock ring assemblies.
IMPORTANT: The notch on the end of the sleeve should be aligned with the three vertical dots on the lock ring outside iameter
when properly installed.

Hold the entire seal assembly and carefully invert it, and place on a clean work surface. Press firmly on the top of the lock  ring and engage the 1/4 dog set screws  into the small holes in the sleeve. Tighten  1/4 dog screws evenly to keep lock ring centered properly  with the sleeve. CAUTION: DO NOT deflect sleeve by overtightening the 1/4 dog point screws. The
1/4 dog set screws must not protrude into the
sleeve inside diameter.| Install the centering clips by engaging the slot in the clips with the  lip. 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-tighten 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 4,5 Nm (40 in-lbs.)
Sizes 70 mm – 120 mm (2.750″ – 4.750″)
to 7,8 Nm (70 in-lbs.)| Install the stuffing box gasket in the gland recess.

Apply a thin film of grease to the shaft O-Ring
(V) and insert into the groove in the sleeve
inside diameter.| The seal is ready for installation.|

MECHANICAL SEAL RETURNS AND HAZARD COMMUNICATION REQUIREMENTS

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.

860 Salem Street
Groveland, MA 01834 USA
Telephone: +1 781-438-7000 Fax: 978-469-6528
chesterton.com
© 2023 A.W. Chesterton Company.
® Registered trademark owned by A.W. Chesterton Company
in USA and other countries.

References

• Sealing Solutions & Equipment Reliability | A.W. Chesterton Company
• AW Chesterton Company | ISO Approvals / Compliance
• Mechanical Seal Returns

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