John crane 32 Guide

TYPE 32

Installation, Operation & Maintenance Instructions

PAGE 1

Foreword

This instruction manual is provided to familiarise the user with the seal and its designated use. The instruc-

tions must be read and applied whenever work is done on the seal, and must be kept available for future ref-

erence.

These instructions are for the installation and operation of a single seal running against a

seat/mating ring of appropriate material and design as used in rotating equipment: the

instructions will help to avoid danger and increase reliability. The information required

may change with other types of equipment or installation arrangement, and this manual

must be read in conjunction with the instruction manual supplied with the seat/mating ring

and the instruction manuals for both the vessel and any ancillary equipment.

If the seal is to be used for an application other than that originally intended or outside the recommended

performance limits, ohn Crane must be contacted before its installation and use.

Any warranty may be affected by improper handling, installation, or use of this seal: contact ohn Crane for

information as to exclusive product warranty and limitations of liability.

If questions or problems arise, contact your local ohn Crane representative or the original equipment manu-

facturer, as appropriate.

ohn Crane mechanical seals and seats/mating rings are precision products and must be

handled appropriately. Take particular care to avoid damage to lapped sealing faces and

flexible sealing rings. Do not excessively compress the seal before or during installation.

ATTENTION

Safety Instructions

1. The following designations are used in this instruction manual to highlight instructions of particular importance:

Refers to special information on how to install or operate the seal

most efficiently.

Refers to special information or instructions directed towards the

prevention of damage to the seal or its surroundings.

efers to mandatory instructions designed to prevent personal injury or extensive dam-

age to the seal or its surroundings.

2. Installation and removal of the seal must be carried out only by qualified personnel who have read and understood

this instruction manual.

3. The seal is designed exclusively for sealing rotating shafts. The manufacturer cannot be held liable for use of the

seal for purposes other than this.

4. The seal must only be used in technically perfect condition and in conjunction with a suitable seat/mating ring, and

must be operated within the recommended performance limits in accordance with its designated use and the

instructions set out in this manual.

5. If the vessel fluid is hazardous or toxic, appropriate precautions must be taken to ensure that any seal leakage is

adequately contained. Further information on sealing hazardous or toxic fluids should be obtained from ohn Crane

prior to installation.

6. PTFE and fluorocarbon components should never be burned or incinerated as the fumes are highly toxic. If fluoro-

carbons are accidentally heated above 400°C they can decompose, and protective gloves must be worn when han-

dling as hydrofluoric acid may be present.

Storage and Transport

Instructions for the handling, packaging, storage and transport of seal units and seats/mating rings are given in -

Storage-E, available on request.

ATTENTION

NOTE:

Type 32 Pressure/Velocity (PV) Limits

250

200

150

100

0025 50 75 100 125 150 175 (mm)

01234567 (inches)

50 rpm

Pressure (bar g) Pressure (psig)

Seal Size

Maximum

Operating

Pressures

400 rpm 200 rpm

100 rpm

The maximum operating pressures shown apply under the following conditions: carbon graphite

face/primary ring running against a silicon carbide or tungsten carbide seat/mating ring, with the

sealed fluid at 80°C / 175°F.

Maximum static/test pressures should be taken as the relevant maximum operating pressure multi-

plied by a factor of 1.5.

Operating Conditions

The Type 32 is an elastomer O-ring, multiple spring, hydraulically balanced, dry running seal supplied in metric

and inch sizes for outside mounting.

These instructions apply to the seal as installed in a top entry mixer, agitator,

or reactor vessel, in accordance with the application information contained in

the ohn Crane technical document S-32-E, and any ohn Crane seal selection literature or process. Typical

operating limits are shown below.

The selection of materials used in the construction of a seal should be made with regard to their temperature

and chemical resistance/compatibility with the product.

Temperature Limits: _45°C to +150°C / _50°F to +300°F

(Depending on the materials used.)

Pressure Limits: Full vacuum to 15 bar g / 225 psig (refer to PV graph)

Speed Limits: Up to 2 m/s / 400 fpm

Type 32 Seal Installation Dimensions

L39

52.4±0.25

WORKING

HEIGHT

ÿD3

ÿD±0.05

SHAFT DIA.

Typical Type 32 Seal Arrangement

Part Name

1Face/Primary Ring

2O-Ring

3Retainer

4Thrust Ring

5Spring

6 T-Bar

7Cap Head Screw

8Set Screw

9O-Ring

10 Seat/Mating Ring

and Gaskets*

11 Gland Plate

*Refer to seat/mating

ring instruction manual

TYPE 32

Installation, Operation & Maintenance Instructions

PAGE2

Take particular care to

The manufacturer

Seal Seal

Size Size D D3 L39

(mm) Code

25 0250 25 63.5 †

28 0280 28 66.7 †

30 0300 30 69.9 †

32 0320 32 69.9 †

33 0330 33 73.0 †

35 0350 35 73.0 †

38 0380 38 76.2 †

40 0400 40 79.4 72.9

43 0430 43 82.6 73.0

45 0450 45 85.7 73.0

50 0500 50 88.9 77.8

53 0530 53 92.1 77.8

55 0550 55 95.3 78.4

58 0580 58 98.4 77.8

60 0600 60 98.4 77.8

63 0630 63 101.6 77.8

65 0650 65 104.8 78.4

68 0680 68 108.0 77.8

70 0700 70 108.0 77.8

75 0750 75 114.3 77.8

Seal Seal

Size Size D D3 L39

(mm) Code

80 0800 80 120.7 77.8

85 0850 85 123.8 77.8

90 0900 90 130.2 78.4

95 0950 95 133.4 77.8

100 1000 100 139.7 80.4

105 1050 105 142.9 77.8

110 1100 110 149.2 77.8

115 1150 115 155.6 79.4

120 1200 120 158.8 79.4

125 1250 125 165.1 79.4

130 1300 130 168.3 79.4

135 1350 135 174.6 79.4

140 1400 140 181.0 79.4

145 1450 145 184.2 79.4

150 1500 150 190.5 79.4

155 1550 155 193.7 79.4

160 1600 160 200.0 79.4

165 1650 165 203.2 79.4

170 1700 170 209.6 79.4

175 1750 175 215.9 †

Seal Seal

Size Size D D3 L39

(inches) Code

1.000 0254 25.40 63.5 †

1.125 0285 28.58 66.7 †

1.250 0317 31.75 69.9 †

1.375 0349 34.93 73.0 †

1.500 0381 38.10 76.2 †

1.625 0412 41.28 79.4 72.9

1.750 0444 44.45 82.6 73.0

1.875 0476 47.63 85.7 73.0

2.000 0508 50.80 88.9 77.8

2.125 0539 53.98 92.1 77.8

2.250 0571 57.15 95.3 78.4

2.375 0603 60.33 98.4 77.8

2.500 0635 63.50 101.6 77.8

2.625 0666 66.68 104.8 78.4

2.750 0698 69.85 108.0 77.8

2.875 0730 73.03 111.1 77.8

3.000 0762 76.20 114.3 77.8

3.125 0793 79.38 117.5 77.8

3.250 0825 82.55 120.7 77.8

3.375 0857 85.73 123.8 77.8

Seal Seal

Size Size D D3 L39

(inches) Code

3.500 0889 88.90 127.0 77.8

3.625 0920 92.08 130.2 78.4

3.750 0952 95.25 133.4 77.8

3.875 0984 98.43 136.5 77.8

4.000 1016 101.60 139.7 80.4

4.125 1047 104.78 142.9 77.8

4.250 1079 107.95 146.1 77.8

4.375 1111 111.13 149.2 77.8

4.500 1143 114.30 152.4 79.4

4.625 1174 117.48 155.6 79.4

4.750 1206 120.65 158.8 79.4

4.875 1238 123.83 161.9 79.4

5.000 1270 127.00 165.1 79.4

5.125 1301 130.18 168.3 79.4

5.250 1333 133.35 171.5 79.4

5.375 1365 136.53 174.6 79.4

5.500 1397 139.70 177.8 79.4

5.625 1428 142.88 181.0 79.4

5.750 1460 146.05 184.2 79.4

5.875 1492 149.23 187.3 79.4

C S S C Sales/Service Engineer

Metric ange Dimensional Data (mm) (Cont.)

Metric ange Dimensional Data (mm) Inch ange Dimensional Data (mm)

† For these dimensions contact your ohn Crane. † For these dimensions contact your ohn Crane Representative

Seal Seal

Size Size D D3 L39

(inches) Code

1.000 0254 25.40 63.5 †

1.125 0285 28.58 66.7 †

1.250 0317 31.75 69.9 †

1.375 0349 34.93 73.0 †

1.500 0381 38.10 76.2 †

1.625 0412 41.28 79.4 72.9

1.750 0444 44.45 82.6 73.0

1.875 0476 47.63 85.7 73.0

2.000 0508 50.80 88.9 77.8

2.125 0539 53.98 92.1 77.8

2.250 0571 57.15 95.3 78.4

2.375 0603 60.33 98.4 77.8

2.500 0635 63.50 101.6 77.8

2.625 0666 66.68 104.8 78.4

2.750 0698 69.85 108.0 77.8

2.875 0730 73.03 111.1 77.8

3.000 0762 76.20 114.3 77.8

3.125 0793 79.38 117.5 77.8

3.250 0825 82.55 120.7 77.8

3.375 0857 85.73 123.8 77.8

Seal Seal

Size Size D D3 L39

(inches) Code

3.500 0889 88.90 127.0 77.8

3.625 0920 92.08 130.2 78.4

3.750 0952 95.25 133.4 77.8

3.875 0984 98.43 136.5 77.8

4.000 1016 101.60 139.7 80.4

4.125 1047 104.78 142.9 77.8

4.250 1079 107.95 146.1 77.8

4.375 1111 111.13 149.2 77.8

4.500 1143 114.30 152.4 79.4

4.625 1174 117.48 155.6 79.4

4.750 1206 120.65 158.8 79.4

4.875 1238 123.83 161.9 79.4

5.000 1270 127.00 165.1 79.4

5.125 1301 130.18 168.3 79.4

5.250 1333 133.35 171.5 79.4

5.375 1365 136.53 174.6 79.4

5.500 1397 139.70 177.8 79.4

5.625 1428 142.88 181.0 79.4

5.750 1460 146.05 184.2 79.4

5.875 1492 149.23 187.3 79.4

Seal Seal

Size Size D D3 L39

(inches) Code

6.000 1524 152.40 190.5 79.4

6.125 1555 155.58 193.7 79.4

6.250 1587 158.75 196.9 79.4

6.375 1619 161.93 200.0 79.4

6.500 1651 165.10 203.2 79.4

6.625 1682 168.28 206.4 79.4

6.750 1714 171.45 209.6 79.4

6.875 1746 174.63 212.7 †

7.000 1778 177.80 215.9 †

† F h di i J h C S l /S i E i

Inch ange Dimensional Data (in) Inch ange Dimensional Data (i) (Cont.) Inch ange Dimensional Data (in) (Cont.)

† For these dimensions contact your ohn Crane Representative

Lead-On Chamfer

For ease of installation, the lead-on edge of the shaft or sleeve should be

chamfered as shown.

BREAK

EDGE

P 2.5 mm

Q10°

1mm RADIUS

Checking the Equipment

Successful operation and life of this seal is dependent on acceptable equipment

dimensions, alignments, and finishes. Before installation of the seal, the following

checks should be made with respect to the seal housing and the shaft, especially

(where marked †) at the seal position. The usual equipment to measure these fea-

tures would include a micrometer and dial indicator.

Shaft/Sleeve Outside Diameter † Refer to Dimension Tables

Shaft/Sleeve Finish † 0.2 to 1.2 µm Ra

Shaft/Sleeve Ovality/Out-of-Roundness † < 0.05 mm / 0.002 in.

Shaft End Play/Axial Float ± 1.60 mm / 0.063 in.

Shaft/Sleeve Run-Out † < 3.81 mm / 0.150 in. F.I.M.

Shaft/Sleeve Lead-On Refer to Lead-On Chamfer

Seal Housing End Face Squareness < 0.80 mm / 0.031 in. F.I.M.

to Shaft/Sleeve

NOTE: If the measured dimensions exceed the values given, correct the equipment

to meet the specifications before installing the seal. If the seal is installed on

a sleeve, the sleeve must be liquid- and pressure-tight through its bore. The

thickness of the gland plate must be sufficient to retain the service pressure

without distortion.

Operating Conditions

The Type 32 is an elastomer O-ring, multiple spring, hydraulically balanced, dry running

seal supplied in metric and inch sizes for outside mounting.

These instructions apply to the seal as installed in a top entry mixer, agitator,

or reactor vessel, in accordance with the application information contained in

the ohn Crane technical document S-32-E, and any ohn Crane seal selection litera-

ture or process. Typical operating limits are shown below.

The selection of materials used in the construction of a seal should be made with

regard to their temperature and chemical resistance/compatibility with the product.

Temperature Limits: _45°C to +150°C / _50°F to +300°F

(Depending on the materials used.)

Pressure Limits: Full vacuum to 15 bar g / 225 psig (refer to PV graph)

Speed Limits: Up to 2 m/s / 400 fpm

TYPE 32

Installation, Operation & Maintenance Instructions

PAGE 3

Setting the Seal

The seal must be installed to its correct working height within the tolerance allowed - refer to the installation dimen-

sion diagram. The procedure is the same for a shaft and a fitted sleeve.

If the working height is exceeded, the seal will be undercompressed and may leak: If the working

height is reduced, the seal will be overcompressed and this may cause high wear of the seal

faces.

1. Find the true seal position as follows:

a) Before the installation of the seat/mating ring. From the dimension tables find the dimension L39 for the size

of seal being fitted, and measure this distance from the seal housing/vessel face and mark the shaft; or,

b) After installation of the seat/mating ring. Using the standard working height dimension, measure this dis-

tance from the face of the seat/mating ring and mark the shaft.

The marked position is the point on the shaft where the back of the seal is to be located.

ATTENTION

Installing the Seal

Before starting the installation, read the following instructions carefully, both to be aware of special information, and because

the fitting sequence may be different depending on the construction of the vessel.

1. Remove the protective packaging from the seal; check for damage, and wipe clean.

2. Fit the seat/mating ring and the gland plate as described in the seat instruction manual. Incorporate the debris well at this

stage, if required.

NOTE: Use a suitable lubricant when fitting the seal. The recommended lubricants for an elastomer O-ring are soft hand soap

and water, glycerine, or silicone grease: do not use washing-up liquid, liquid soaps, or hand cleaning gels. Light min-

eral oil may be used with most elastomers.

Do not use hydrocarbon-based liquids on ethylene propylene elastomers.

3. Clean and sparingly lubricate the shaft.

4. Wipe the lapped surfaces of the seal and seat/mating ring perfectly clean.

Particular care should be taken when passing the seal over shaft shoulders to avoid impact and conse-

quent damage to the stepped bore of the seal face/primary ring.

5. Adjust the set screws until clear of the retainer bore. Slide the seal unit onto the shaft until the seal face rests on the

seat/mating ring; then compress the seal until the back of the retainer is in line with the seal setting mark, and, using the

Allen key provided, tighten the set screws sufficently to hold the seal in the setting position. Check that the seal is accu-

rately positioned, then continue to tighten the screws evenly and progressively to the torque recommended in the torque

table.

Accurate torque settings will avoid set screw damage and eliminate seal movement in operation.

ATTENTION

SEAT/

MATING

RING

DEBRIS

WELL

(OPTIONAL)

GLAND

PLATE

FLUSH/

PURGE

CONNECTIONS

Debris Well Option

Where the process liquid or gas must be protected from contamination by face wear particles, a debris well is available as

an option. In conjunction with the gland plate and seat/mating ring, the debris well forms a cavity to isolate and contain

face debris: tapped connections allow flushing of the cavity during the cleaning cycle.

The debris well is secured by the gland plate, and is therefore installed as part of the seat/mating ring installation

sequence - refer to the equipment and seat instruction manuals. Note that the inclusion of a debris well will affect seal

setting procedure 1a.

Before Commissioning the Equipment

1. Check the unit at the coupling for correct alignment of the motor or driver.

2. Complete the assembly of the equipment, and turn the shaft (by hand, if possible) to ensure free rotation.

The torque values given above are for stainless steel (001)

cup point set screws.

Set Torque

Seal Size Code Screw

Size Nm lbf ft

0250 to 0857 1/4 - 20 UNC 6 4.5

0889 to 1778 5/16 - 24 UNC 12 9.0

ecommended Torques for Set Screws

Maintenance

During operation, periodic inspection of the seal should be carried out. A measure of seal condition is the level of leakage,

and as no maintenance is possible while installed, the seal should be replaced when leakage becomes unacceptable. It is

recommended that a spare seal unit and seat/mating ring are held in stock to allow immediate replacement of a removed

seal.

Decommissioning the Equipment

1. Ensure that the vessel 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. emember that fluid is often trapped during

draining and may be present inside the seal unit. The equipment instruction manual should be consulted

to check for any special precautions.

2. Ensure that the vessel is isolated by the appropriate valves. Check that the product is drained and pressure fully

released.

emoving the Seal

1. Referring to the vessel instruction manual, dismantle the equipment sufficiently to expose the seal.

2. Remove the seal, and then, if necessary, complete the removal of the gland plate and seat/mating ring in the

reverse order to installation.

NOTE: Although the original seal position may be marked on the shaft or sleeve as a reference point before seal

removal, the location must be checked even if the same seal and seat/mating ring specification is intended

as a replacement.

A seal unit should always be serviced after removal from duty. It is recommended that used seals are returned to a

ohn Crane service location, since rebuilding to as-new specification must be carried out by qualified personnel.

It is the responsibility of the equipment user to ensure that any parts being sent to a third party

have appropriate safe-handling instructions externally attached to the package.

If the products featured will be used in a potentially dangerous and/or hazardous process, your John Crane representative should be consulted prior to

their selection and use. In the interest of continuous development, John Crane Companies reserve the right to alter designs and specifications without

prior notice. It is dangerous to smoke while handling products made from PTFE. Old and new PTFE products must not be incinerated. ISO 9001 and

ISO14001 Certified, details available on request.

North America

nited States of America

Tel: 1-847-967-2400

Fax: 1-847-967-3915

Europe

nited Kingdom

Tel: 44-1753-224000

Fax: 44-1753-224224

Latin America

Brazil