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, John Crane must be contacted before its installation and use.
Any warranty may be affected by improper handling, installation, or use of this seal: contact John Crane for
information as to exclusive product warranty and limitations of liability.
If questions or problems arise, contact your local John Crane representative or the original equipment manu-
facturer, as appropriate.
John 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
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.
Refers 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 John 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
50
0
20
15
10
5
0
0
25
50
75
100
125
150
175 (mm)
0
1
2
3
4
5
6
7 (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 John Crane
technical document
S-32-E, and any John 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
10
9
2
3
8
6
11
1
4
5
7
L39
52.4±0.25
WORKING
HEIGHT
ÿD3
ÿD±0.05
SHAFT DIA.
Typical Type 32 Seal Arrangement
Part Name
1
Face/Primary Ring
2
O-Ring
3
Retainer
4
Thrust Ring
5
Spring
6
T-Bar
7
Cap Head Screw
8
Set Screw
9
O-Ring
10
Seat/Mating Ring
and Gaskets*
11
Gland Plate
*Refer to seat/mating
ring instruction manual
