4499_243_A.pdf

TP: 4499

HULL, MECHANICAL &

ELECTRICAL

Department of Homeland Security

UNITED STATES

COAST GUARD

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PUBLISHED UNDER AUTHORITY OF THE U.S. COAST GUARD

SWBS: 243 DATE: 12 JUN 2018

TECHNICAL PUBLICATION

STERN TUBE SEAL - MODEL 442C

87' WPB CLASS CUTTERS

United States Coast Guard Surface Forces Logistics Center

2401 Hawkins Point Road Baltimore, MD 21226 Phone: (410) 582-4725 Fax: (410) 762-6898

12 JUN 2018

MEMORANDUM

From: Mitch Frid, Branch Chief

SFLC-ESD-TIMB

Reply to Attn of:

SFLC-ESD-TIMB-PPDS

R. Infantino

To: Distribution

Subj: Coast Guard Technical Publication 4499

Ref: (a) SFLC Central Activity 27372, dated 11 APR 2018

(b) Authorization Document: Casefile WPB-087-12-013, TCTO TA4020.0

1. PURPOSE. IAW ref (a) and (b), this memorandum promulgates Technical Publication 4499 for the Stern Tube Seal – Model 442C onboard the 87’ WPB Class Cutters.

2. PUBLICATION AFFECTED. Technical Publication 4499

3. ACTION. Technical Publication 4499 is available in the Coast Guard Logistics Information Management System – Surface Technical Information Portal (CGLIMS-STIP) data repository and is ready for viewing. If you require a hardcopy and are unable to print the document yourself, please order using the Document Ordering System within CGLIMS-STIP.

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RECORD OF CHANGES

TP NO. ______

DATE AMEND. NO. NAME SIGNATURE EFFECTIVE DATE

INDIVIDUAL MANUAL APPLICATION SHEET

Technical Publications Number

SWBS Number 243

SWBS Element Title PROPULSION SHAFTING

Section Identifier A

Section Title STERN TUBE SEAL – MODEL 442C

Remarks

Section Applicability

Asset Subclass Hulls Notes

87-WPB 87A-WPB

87301, 87302, 87303, 87304, 87605, 87306, 87307, 87308, 87309, 87310, 87311, 87312, 87313, 87314, 87315, 87316, 87317, 87318, 87319, 87320, 87321, 87322, 87323, 87324, 87325, 87326, 87327, 87328, 87329, 87330, 87331, 87332, 87333, 87334, 87335, 87336, 87337, 87338, 87339, 87340, 87341, 87342, 87343, 87344, 87345, 87346, 87347, 87348, 87349, 87350, 87351, 87352, 87353, 87354, 87355, 87356, 87357, 87358, 87359, 87360, 87361, 87362, 87363, 87364, 87365, 87366, 87367, 87368, 87369, 87370, 87371, 87372, 87373, 87374

901-WMEC

A.W. Chesterton Company, 860 Salem Street, Groveland, Massachusetts 01834 USA · Tel: (978) 469-6446 Fax: (978) 469-6528 · www.chesterton.com

Table of Contents Page

Section 1 2 442C Installation, Operation and Maintenance Instructions

Section 2 19 442C Installation Troubleshooting Guide

Section 3 21 Inflatable Safety Seal General Installation Instructions

Section 4 26 Chesterton 442C/ISS Split Stern Tube Drawing with Table of Contents

A.W. Chesterton Company, 860 Salem Street, Groveland, Massachusetts 01834 USA · Tel: (978) 469-6446 Fax: (978) 469-6528 · www.chesterton.com

Section 1

442C Installation, Operation and Maintenance Instructions

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)

ITEM #

SEAL

(Example: 442C – 50 mm SSC/CB)

INSTALLATION DATE

1.0 Cautions

2.0 Transport and Storage

3.0 Description

3.1 Parts Identification .............................................................2 - 3

3.2 Operating Parameters

3.3 Intended Use

3.4 Dimensional Data ...............................................................4 - 5

4.0 Preparation for Installation .................................6 - 8

4.1 Equipment

4.2 442C Cartridge Split Mechanical Seal

5.0 Seal Installation ..................................................... 9 - 11

5.1 442C Installation Video

6.0 Commissioning/Equipment Start-up

7.0 Decommissioning/Equipment Shut Down

8.0 Spare Parts

9.0 Seal Maintenance and Repair ......................12 - 16

9.1 442C Seal Repair Instruction Video

9.2 Returning Seals for Repair;

Hazard Communication Requirements

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:

• Dust free environment

• Moderately ventilated at room temperature

• Avoid exposure to direct sunlight and heat

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.

• For elastomers, storage conditions should conform to ISO 2230; particularly storage temperatures between 15°C (59°F) and 25°C (77°F). If stored outside these ranges, the seal assembly or spare parts should be unboxed in a clean environment, with ambient temperature within the previously stated ranges, and allowed to recover for at least 1 hour prior to installation. Failure to follow this step can impact the performance of the seal.

1.0 CAUTIONS

2.0 TRANSPORT AND STORAGE

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)

3.0 DESCRIPTION

3.1 Parts Identification

Figure 1

B

L

G

P NPT

P NPT

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.

3.0 DESCRIPTION cont.

3.1 Parts Identification

Figure 2

KEY

NOT SHOWN AS PART OF INSTALLED SEAL

20 – Rotary Holder Installation Spacer 21 – Rotary Holder Shipping Spacer 22 – Gland Shipping Spacer 23 – Gland Installation Tool

2320 21 22

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 Outside Diameter L – Gland Hub Outside Diameter M – Holder End from Box N – Installation Dimension P – NPT Size Q – Shaft O-Ring from Box R – Set Screw from Box S – Min. Sleeve Length from Box

E N

D

G

H

C B

L

P NPT

P NPT

M A

F

Q

R

Table 1 – Dimensional Data (Metric and Inch)

SHAFT SIZE

M

HOLDER

INSIDE

DIAMETER

FROM BOX

N

INSTALLATION

DIM

P

NPT

SIZE

Q

SHAFT

O-Ring

FROM BOX

R

SET SCREW

FROM BOX

S

SLEEVE

LENGTH

FROM BOX

25 mm to 38 mm (1.000" to 1.500")

24,4 mm (0.96")

2,4 mm (0.09") 1/4" 12,7 mm

(0.50") 5,8 mm (0.23")

15,2 mm (0.60")

40 mm to 60 mm (1.625" to 2.500")

24,4 mm (0.96")

2,4 mm (0.09") 3/8" 12,7 mm

(0.50") 5,8 mm (0.23")

15,2 mm (0.60")

65 mm to 120 mm (2.625" to 4.750")

27,1 mm (1.07")

2,4 mm (0.09") 3/8" 12,4 mm

(0.49") 5,8 mm (0.23")

15,7 mm (0.62")

2 BOLTS 3 BOLTS 4 BOLTS

Figure 4 – Mounting Configurations with Bolt Tabs

3.0 DESCRIPTION cont.

3.4 Dimensional Data (Drawings)

Figure 3

3.0 DESCRIPTION cont.

Table 2 – Dimensional Data

METRIC - Millimeters

A B

MAX

C D E

MIN F

G 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 70,0 196,1 85,1 108,0 48,0 8,1 57,7 - - 140,6 142,6 144,6 146,6* 148,6* 120,7 126,6 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

A B

MAX

C D E

MIN F

G MIN H

MIN

L

MAXMIN 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

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 0,05 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 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 (.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 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

3 4

.005" 0,13 mm

32 µ" 0,8 µm Ra ø ø 200< ø

< ø ø

.002" 0,05 mm±

125 µ" 3,2 µm

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 and 2 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.

4.0 PREPARATION FOR INSTALLATION cont.

Remove seal from packaging and place on clean work surface. Ensure installation spacers are seated on outside diameter of rotary holder halves. Important: DO NOT glue any O-Rings, holder or gland half gaskets!

2 3

2X

2X

Disengage rotary holder screws and separate rotary holder halves.

Important! Remove entire shipping spacer assembly from each holder half by pulling on tab;

retain for future use. Caution: Do not push on the rotary faces. Re-install shipping spacers if this occurs.

Shipping Spacer Assembly

Remove gland split shipping spacers from each gland half.

2X

Disengage gland cap screws and separate gland halves.

2X

Ensure that the gland gaskets are lubricated and seated in their grooves.

Ensure that the rotary holder shaft O-Ring is properly seated in its groove with both ends protruding evenly. Apply grease to shaft O-Ring only where it contacts the shaft.

Ensure that gland spring lifter is extended prior to starting installation of gland assembly.

If spring lifter is not in its proper position, review rebuild instructions.

Spring Lifter

To prevent seal leakage, ensure that the stationary face O-Ring ends are flush with but not below the stationary face splits. Carefully push on O-Ring ends if they protrude past the face splits. Preparation complete; go to Seal Installation

To prevent seal leakage, ensure that the rotary face O-Ring ends are flush with but not below the face splits. Push on O-Ring ends if they protrude past the face splits.

Ensure the rotary face O-Rings are positioned in holder O-Ring detent. If rotary face O-Rings are not in the holder detent, review rebuild instructions.

Rotary holder O-Ring detent

Shaft O-Ring

Ensure that the holder gaskets are lubricated and seated in their grooves. Important: Set screws protruding past the inside diameter may cause the holder to deform resulting in shaft leakage and/or damage to the rotary faces.

Holder Gasket

Set Screw

5.0 SEAL INSTALLATION

Gaps at holder splits should be equal on both sides.

Use hex wrench and alternately tighten holder cap screws to finger-tightness to allow holder to slide along the shaft. Caution: Care should be taken not to rotate the rotary holder on the shaft.

2X

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). Ensure gaps at holder splits are equal on both sides (see Figure 5).

Caution: DO NOT push directly on seal face.

2X

Alternately tighten 2 holder set screws (1 per holder half) (refer to Table 4 – Holder Set Screw Torque Values).

2X

Table 3 Holder Cap Screw Torque Values

SEAL SIZE

HOLDER

CAP

SCREW* (X)

HEX

WRENCH

SIZE

25 mm to 60 mm (1" to 2.5")

4,8 Nm (43 in-lbf) 5/32

65 mm to 120 mm (2.625" to 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

25 mm to 120 mm (1" to 4.75") 4,3 Nm

(38 in-lbf) 1/8

* Recommended maximum

Remove installation spacers; retain for future use.

2X

Clean rotary face with supplied cleaning wipe, ensuring there is no debris at splits. Caution: Do not push on seal face - it may cause the seal face to misalign resulting in seal leakage.

Bring rotary holder assembly halves together over shaft, engaging the pins. Caution: DO NOT use holder installation spacers as handles. Note:

If shaft cannot be rotated manually, the holder split line should not align with the gland split line (refer to steps 12 and 17).

Equipment shaft should be cleaned and greased prior to rotary holder installation. Apply supplied grease only to face splits. Do not apply grease to o-ring ends. Caution: Dirt particles on seal face splits may cause leakage. The rotary holder should not be rotated on the shaft during Steps 2 through 4 as it may lead to shaft leakage and/ or face damage.

Apply supplied grease only to face splits. Do not apply grease to O-Ring ends. Caution: Dirt particles on seal face splits may cause leakage.

Install gland installation tool between holder assembly and stuffing box face.

5.0 SEAL INSTALLATION cont.

Seal installation complete (refer to EQUIPMENT STARTUP). Note: Four bolt configuration is shown. (refer to Figure 4 - Mounting Configurations for other bolt quantities).

If possible rotate gland together with shaft when aligning gland bolt slots with the stuffing box bolt holes (refer to step 12 ).

Alternately tighten gland cap screws to specified torque (refer to Table 5 – Gland Cap Screw and Stuffing Box Bolt Torque Values). Note: The spring lifter will automatically move into its final position once the gland cap screws are tightened.

2X

2X

Carefully remove the gland installation tool, taking care not to dislodge the gland stuffing box gasket. Retain the gland installation tool for future use.

Bring the second gland half squarely into position against the gland installation tool, ensuring the pins and gland bolts are engaged.

Clean stationary face with cleaning wipe, ensuring that there is no debris at splits.

Position the gland splits approximately 90 degrees from the rotary holder splits.

90°

Bring the first gland half squarely into position by sliding the gland gasket face against the gland installation tool, ensuring the stationary face does not make contact with the rotary face.

Install and alternately tighten stuffing box bolts to recommended torque (refer to Table 5 – Gland Cap Screw and Stuffing Box Bolt Torque Values).

2X or 4X

Table 5 – Gland Cap Screws and Stuffing Box Bolt Torque Values

SEAL SIZE GLAND

CAP SCREWS* (Y)

HEX WRENCH

SIZE

STUFFING BOX

BOLTS** (Z)

25 mm to 60 mm (1" to 2.5")

14-20 Nm (125 – 175 in-lbf) 5/16 13,5-27 Nm

(15 – 20 ft-lbf)

65 mm to 120 mm (2.625" to 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.

Installation Tool

5.0 SEAL INSTALLATION cont.

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.

http://www.chesterton.com/442C_Videos

9.0 SEAL MAINTENANCE AND REPAIR

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 outside diameter of rotary holder.

Remove used rotary holder gaskets.

Remove used holder set screws (2 places) from rotary holder.

Remove used shaft O-Ring halves.

2X

2X

Remove used gland gaskets from gland grooves.

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 pliers (remove centering buttons)

• Small, flat-head screwdriver (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.

Remove all spare parts kit components from packaging and place on the clean work surface.

Remove used gland cap screws.

2X2X

9.0 SEAL MAINTENANCE AND REPAIR cont.

Remove used stationary face O-Ring.

Lubricate threads with a recommended anti-seize compound and 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 diameter of the rotary holder.

2X

Lubricate threads with a recommended anti seize compound and install holder cap screws in rotary holder half.

2X2X

Install new centering buttons on outside diameter of rotary holder. Important: Make sure buttons are fully seated without deforming the exposed heads

2X6X

Remove used stuffing box gasket from gland recess and all adhesive residue with cleaning solvent.

Remove used springs from gland halves by tapping them from the gland half inside diameter with a small hammer

Remove spring lifter halves from gland halves.

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.

(Refer to step 9 on page 8).

Remove used spring retainers from gland halves. Note: When last retainer is removed the stationary seal ring can be removed

Install rotary holder shipping spacers in rotary holder halves to hold the rotary face O-Ring in place.

Clean rotary face halves with cleaning wipe.

9.0 SEAL MAINTENANCE AND REPAIR cont.

Install installation spacers on outside diameter of holder halves.

2X

Apply a thin film of grease and install holder half gaskets (1 per holder half).

2X2X

Install spring lifter clips in gland halves.

Apply a thin film of grease and install rotary face O-Ring halves in rotary holder halves.

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 ends of first half.

Gasket Guide

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 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.

2X

Install springs into spring slots on gland. Use a plastic tipped mallet to ensure springs are seated into place.

6X, 8X or 10X

Spring lifter clips installed in gland halves.

30a

Ensure that the rotary face O-Ring ends are flush, not below, with the face splits. Push on O-Ring ends if they protrude past the face splits.

Install rotary face halves in rotary holder halves.

Press on face to seat rotary in holder halves, Align flat on outside diameter of rotary face with flat on inside diameter surface of rotary holder.

Clean stationary face halves with cleaning wipe to ensure there is no debris on face and at splits.

Stationary face half installed in gland half.

Important: Ensure that O-Ring splits are still protruding evenly at both sides.

35a

Spring retainer installed.

36a

Seal components are ready for installation.

Proceed to Seal Installation Instructions.

9.0 SEAL MAINTENANCE AND REPAIR cont.

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.

Install stationary face halves into gland halves.

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.

2X 2X2X

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.

2X

Install spring retainers in gland halves, holding the stationary seal ring half in the gland.

Ensure that the stationary face O-Ring ends are flush with and not below the stationary face splits. Push on O-Ring ends if they protrude past the stationary face splits.

FORM NO. EN14068 REV 7 10/17

860 Salem Street Groveland, MA 01834 USA Telephone: 781-438-7000 Fax: 978-469-6528 www.chesterton.com

© 2017 A.W. Chesterton Company.

® Registered trademark owned by A.W.Chesterton Company in USA and other countries.

Chesterton ISO certificates available on www.chesterton.com/corporate/isoDISTRIBUTED 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.

http://www.chesterton.com/442C_Videos http://www.chesterton.com/Mechanical_Seal_Returns

A.W. Chesterton Company, 860 Salem Street, Groveland, Massachusetts 01834 USA · Tel: (978) 469-6446 Fax: (978) 469-6528 · www.chesterton.com

Section 2

442C Installation Troubleshooting Guide

The 442C Cartridge Split Mechanical Seal incorporates technical advancements that significantly increase seal performance and reliability; and simplify seal installation. When installing the 442C, as with any sealing device, familiarity with the proper installation procedure optimizes reliable sealing at equipment start-up. Installation videos are available at: www.chesterton.com/442C_Videos.

Chesterton split seals are designed to be leak free. However, due to variable equipment and operating conditions, some leakage may occur during the startup period. Typically, the leakage diminishes or stops as the seal faces and elastomers conform to their matting surfaces.

If leakage is greater than 60 drops per minute, confirm that the equipment and operating installation conditions are within recommended specification (pump sleeves sealed properly, etc.). If seal installation is the probable cause, then this guide can be used to correct the source of the seal leakage. This guide references sections from the 442C Cartridge Split Seal Installation, Operating and Maintenance Instructions, Rev. 6.

NOTE: Make sure the equipment and the operating conditions are within the established seal operating parameters. Record the source of the leakage as this may be helpful in determining the corrective action required. Record if the leakage follows the shaft rotation.

442C™ Cartridge Split Mechanical Seal Installation Troubleshooting Guide

PROBLEM CHECK SOLUTION

Seal leakage at the gland splits Adjustment of the gland socket head cap screws and stuffing box bolts can affect the gland split leakage.

Make adjustments and if leakage continues, remove gland assembly from equipment and perform the following inspections.

Ensure gland split gaskets are seated properly in their grooves.

Inspect gaskets/O-Rings for cuts or nicks.

If gaskets can still be used, re-install gaskets or replace with new per Section 9.0, Step 38.

Seal leakage from stuffing box gasket area

Ensure the gland is properly seated against the stuffing box face surface. Ensure the stuffing box bolts are torqued to the proper values per Section 5.0 Step 18, Table 5.

Ensure the stuffing box face surface has no steps or potential leak paths on the stuffing box face surface. Refer to Section 4.0 for stuffing box condition requirements.

Rework stuffing box gasket surface to ensure its condition is adequate to seal.

Refer to Section 4.0 for stuffing box condition requirements.

Ensure the stuffing box gasket is in its proper position. Refer to Section 9.0, image in Step 28.

Reposition or replace gasket per Section 9.0, Step 28.

Seal leakage from shaft area which does not follow shaft rotation

Remove gland assembly only (do not remove rotary holder from equipment) and perform the following inspections:

Inspect the stationary seal ring split lines, focusing on possible chips at the O-Ring area.

Any chips in the O-Ring area could affect seal leakage. Replace seal ring per Section 9.0, Steps 34 through 37.

Ensure that the stationary seal ring splits are greased. Clean carefully and apply a thin film of grease to both split surfaces per Section 5.0, Step 10.

Ensure stationary O-Ring splits are flush with stationary seal ring splits. Reposition the O-Ring per Section 9.0, Steps 34 through 37.

Check rotary seal ring for scratches or chips on the sealing surface. If scratches and chips on the seal ring exceed 20% of the sealing surface cross-section install a new rotary seal ring per Section 9.0, Steps 22 and 24.

Ensure the gap between the rotary holder splits are equal on both sides (Reference Section 5.0, Step 5).

If splits are not equal on both sides, adjust the holder socket head cap screws per Section 5.0, Steps 3 through 4. Caution: During this procedure the set screws must be loosened and then retightened after holder socket head cap screws are adjusted; reference Section 5.0, Step 7.

Inspect rotary seal ring splits for misalignment or a step. To correct a step on the splits of the rotary seal ring perform the following steps:

Install the installation P-spacer on the holder. Loosen up the holder socket head cap screws half a turn. Loosen up the set screws half a turn. Press on the high side of the face split until it is level with the lower side. Re-tighten the socket head cap screws (make sure the gap between the holder splits is even on both sides). Re-tighten the set screws. Remove the installation spacers. Clean the faces. Reinstall the gland assembly per installation instructions, Section 5.0, Step 9 through 19.

Inspect the rotary seal ring to make sure it is properly seated in the holder (even protrusion).

If rotary seal ring is not seated in the holder, reinstall per Section 9.0, Steps 22 through 24.

Seal leakage from shaft area which follows shaft rotation

Once holder is removed from equipment:

Check the condition of the shaft at the O-Ring location. Reference Section 4.0 for shaft condition requirements.

Repair/replace shaft per equipment manufacturers requirements.

Ensure rotary seal ring O-Rings are flush with rotary seal ring splits. Reposition O-Rings per Section 4.0, Step 12, and Section 9.0, Steps 21 through 24.

Ensure rotary holder split gaskets are seated properly in their grooves.

Inspect gaskets for cuts or nicks.

If gaskets are in good condition, re-install gaskets or replace with new per Section 9.0, Step 25.

Check O-Ring condition. Replace damaged O-Rings per Section 9.0, Steps 21 through 24.

Please contact Chesterton Mechanical Seal Application Engineering if you have any questions.

A.W. Chesterton Company 860 Salem Street Groveland, MA 01834 USA

Telephone: 781-438-7000 Fax: 978-469-6528 www.chesterton.com

FORM NO. EN36463 REV. 2

4/16

MECHANICAL SEAL

TROUBLESHOOTING GUIDE

© 2016 A.W. Chesterton Company. ® Registered trademark owned and licensed by A.W.Chesterton Company in USA and other countries.

A.W. Chesterton Company, 860 Salem Street, Groveland, Massachusetts 01834 USA · Tel: (978) 469-6446 Fax: (978) 469-6528 · www.chesterton.com

Section 3

Inflatable Safety Seal General Installation Instructions

Description

The Chesterton Inflatable Safety Seal is an on-demand static shaft sealing device. This contained pneumatic inflatable bladder assembly is used in conjunction with a mechanical seal.

The ISS plate firmly affixes to the process equipment, and the mechanical seal is then bolted to it. The ISS is designed to act as a static seal in the event of unacceptable mechanical seal leakage. It can also function as an interim static seal during mechanical seal rebuild. The robust system adds an element of security and flexibility to any sealing application.

Typical uses: Side and bottom entry mixers and agitators, stern tubes, and larger pumps.

CAUTION: The ISS is NOT to be inflated on a rotating shaft!

Preparation

1. Read these instructions completely prior to installing equipment.

2. Installing personnel should be familiar with equipment operation and pressure swings of the particular stuffing box involved.

3. Air connections to the ISS plate are 1/4" NPT. An optional Schradder (tire-style) valve is include in the packaging. This valve can also be used for inflation via a manual pump if a compressed air source is not available.

4. Two pressure gauges and a stop valve are required to properly monitor the ISS during operation/inflation.

Follow this schematic:

5. To inflate the bladder to the proper differential pressure, the following must be known:

PBL = bladder inflation pressure PSB= live stuffing box pressure exposed to the ISS.

Do not rely on the bladder inflation port gauge to read stuffing box pressure!

6. CAUTION: When the plastic shipping plug is removed, ensure that dirt, liquid, or other contamination does not enter the inflation port.

7. Inspect the visible area of the bladder for any nicks or other obvious damage that may inhibit proper sealing. While handling, it is important that the user not expose the bladder to sharp debris that may get caught in between the bladder and plate housing.

Check the stuffing box.

1. The stuffing box face surface finish must be a maximum of 125 micro-inches RMS (3,2 microns) for the ISS plate gasket to seal.

2. Split case pumps will sometimes cause a step (misalignment) to occur on the stuffing box face. This step must be machined flat within 0.001 in (0,03 mm).

3. Make sure the stuffing box is clean and clear along it’s entire length.

4. 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 (.002) (0,06 mm) TIR per inch of shaft diameter.

Installation

1. The ISS is to be placed in between the stuffing box and the mechanical seal.

2. Bolt the ISS to the equipment stuffing box using the provided counter bore through-holes or slots. Insert plastic shim centering gauges between the shaft and plate ID. Tighten the bolts evenly. Remove the gauges.

(Note that the through-holes or slots and their bolt circle is customized to each application.)

3. The ISS will now act as the new surface for mounting the mechanical seal. The ISS has tapped holes on a specific bolt circle that will fit a Chesterton mechanical seal. Unless ordered otherwise, the standard ISS plate has tapped holes to fit a Chesterton 442 or 442M Split Seal.

4. Install the mechanical seal by following the seal installation instructions.

INFLATABLE

SAFETY SEAL (ISS)

SEAL INSTALLATION

CAUTION!

Non-conformance with the stated chemical compatibility or operating parameters for the Inflatable Safety Seal may result in damage to equipment and/or personal injury.

ISS

P

P

BL

SB PRESSURE

GAUGES

VALVE

DIS-

CONNECT

INFLATION

SOURCE

Differential = PBL- PSB

15 psig < Differential < 30 psig

MECHANICAL SEAL

INSTALLATION INSTRUCTIONS

Inflation / Operation

1. CAUTION: The ISS is to be inflated while the shaft is at rest! The ISS is not designed to operate on a rotating shaft. Failure will occur if the shaft is rotating while the bladder is inflated.

2. It is critical that the user know the process pressure inside the equipment stuffing box.

3. A properly installed ISS requires inflation prior to seal disassembly.

Normal inflation pressure is recommended to be approximately 15 psi above the pressure in the stuffing box. As the bladder inflates, it will seal between the plate, shaft, and stuffing box. This action isolates the mechanical seal from the process fluid pressure.

When sealing very low pressure fluids, note that the first 25-30 psig of inflation is necessary to overcome the initial bladder stretch and establish sealing contact to the shaft.

To determine whether the ISS bladder is holding pressure, close the valve as seen in the above schematic. Disconnect the source of inflation at the disconnect shown. To ensure bladder sealing stability, the pressure should hold steady without change for approximately 10 minutes.

4. As a safety precaution to verify that the ISS is sealing, the following procedure is required:

Before removal of the attached mechanical seal, remove the mechanical seal’s flush port plug (or piping connection) to drain any remaining process fluid left in the cavity between the ISS and mechanical seal. This procedure also verifies that the inflated ISS bladder is properly sealing and not bypassing fluid. If in doubt, wait for a period of several minutes to verify that the inflated ISS is sealing.

Non-conformance with the stated chemical compatibility or operating parameters for the Inflatable Safety Seal may result in damage to equipment and/or personal injury.

5. The maximum stuffing box pressure is 100 psig. The maximum bladder inflation pressure is 115 psig.

Contact Chesterton Applications Engineering if using higher process pressures or vacuum.

6. Once assured that the bladder is sealing, the attached mechanical seal can be removed. Take care not to puncture the seal bladder while using tools to disassemble the mechanical seal. Do not attempt to rotate the shaft while the bladder is inflated.

Maintenance & Troubleshooting

1. When in use, the ISS bladder is exposed to the pressure swings from both the process fluid and inflation.

Should the bladder become damaged in any way, replace it with a new Chesterton ISS bladder.

2. If the bladder does not hold inflation pressure, look for the following:

A. a leaking air supply connection, fitting, or valve, B. physical damage to the bladder, C. damage to the small o-ring (-011) around the brass stem attached to the bladder.

3. If the inflated bladder is holding pressure but bypassing process fluid, it is possible that debris could be pinched between the shaft and bladder. If no debris is found consider increasing the bladder inflation pressure. Do not exceed an inflation-stuffing box differential of 30 psi/2 bar, and do not exceed the rated 115 psig inflation pressure.

If sealing is not effected at this point, contact Chesterton Applications Engineering.

4. When the ISS is removed from the process equipment, the bladder should be inspected for any damage.

The bladder can be removed from the plate for inspection. Also inspect the stem o-ring for any damage.

5. Upon bladder re-installation, make sure that no debris or sharp burrs have entered inside the plate housing. Also make sure that the bladder stem is seated all the way into the socket.

6. When installing a new bladder use a silicone based grease (non-petroleum based) to assist proper seating into the ISS plate.

Specifications Components

See attached pages.

Spare Parts Purchase

Individual components may be purchased by contacting A.W. CHESTERTON with the part number and description of the desired components. You can also find Chesterton on the internet:

www.Chesterton.com

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, 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 chemical listing is intended as a general reference for this seal only.

The decision to use this seal or any other CHESTERTON seal or system in a particular service is the customer's responsibility.

SEAL INSTALLATION

SHAFT PLATE STUFFING PLATE EQUIPMENT MOUNT BOLT CIRCLE TAP

SIZE OD BOX BORE THICKNESS BY BOLT SIZE SIZE

A B C D E MIN* G

MAX MIN 12 mm 14 mm 16 mm 18 mm 70 203 114 32 148 151 154 157 5/8 - 11

80 216 127 32 160 163 166 169 3/4 - 10

90 229 133 32 167 170 173 176 3/4 - 10

100 241 146 32 180 183 186 189 3/4 - 10

110 254 159 32 192 195 198 201 3/4 - 10

120 254 165 32 192 195 198 201 3/4 - 10

130 292 191 39 226 229 232 3/4 - 10

140 305 197 39 233 236 239 3/4 - 10

150 318 210 39 245 248 251 3/4 - 10

160 318 216 39 252 255 258 3/4 - 10

170 330 229 39 264 267 270 3/4 - 10

180 343 235 39 277 280 283 3/4 - 10

190 356 248 39 283 286 289 3/4 - 10

DIMENSIONAL DATA (METRIC)

SHAFT PLATE STUFFING PLATE EQUIPMENT MOUNT BOLT CIRCLE TAP

SIZE OD BOX BORE THICKNESS BY BOLT SIZE SIZE

A B C D E MIN* (UNC)

MAX MIN 1/2" 5/8" 3/4" 7/8" G

2.750 8.00 4.50 1.27 5.85 6.04 5/8 - 11

2.875 / 3.000 8.50 4.75 1.27 6.10 6.29 5/8 - 11

3.125 / 3.250 8.50 5.00 1.27 6.35 6.54 6.73 3/4 - 10

3.375 / 3.500 9.00 5.25 1.27 6.60 6.79 6.98 3/4 - 10

3.625 / 3.750 9.00 5.50 1.27 6.85 7.04 7.23 3/4 - 10

3.875 / 4.000 9.50 5.75 1.27 7.10 7.29 7.48 3/4 - 10

4.125 / 4.250 9.50 6.00 1.27 7.35 7.54 7.73 3/4 - 10

4.375 / 4.500 10.00 6.25 1.27 7.60 7.79 7.98 3/4 - 10

4.625 / 4.750 10.00 6.50 1.27 7.60 7.79 7.98 3/4 - 10

4.875 / 5.000 11.50 7.25 1.53 8.76 8.95 9.14 3/4 - 10

5.125 / 5.250 11.50 7.50 1.53 9.01 9.20 9.39 3/4 - 10

5.375 / 5.500 12.00 7.75 1.53 9.26 9.45 9.64 3/4 - 10

5.625 / 5.750 12.00 8.00 1.53 9.51 9.70 9.89 3/4 - 10

5.875 / 6.000 12.50 8.25 1.53 9.76 9.95 10.14 3/4 - 10

6.125 / 6.250 12.50 8.50 1.53 10.01 10.20 10.39 3/4 - 10

6.375 / 6.500 13.00 8.75 1.53 10.26 10.45 10.64 3/4 - 10

6.625 / 6.750 13.00 9.00 1.53 10.51 10.70 10.89 3/4 - 10

6.875 / 7.000 13.50 9.25 1.53 10.76 10.95 11.14 3/4 - 10

7.125 / 7.250 13.50 9.50 1.53 11.01 11.20 11.39 3/4 - 10

7.375 / 7.500 14.00 9.75…