John Crane 5620 Installation, Operation & Maintenance Instructions Manual

Foreword

These instructions are provided to familiarize the user with the seal and its
designated use. The instructions must be read and applied whenever work
is done on the seal, and must be kept available for future reference.

Safety Instructions

1. The following designations are used in the installation instructions to
highlight instructions of particular importance.
NOTE: Refers to special information on how to install or operate
the seal most efficiently.
Refers to special information or instructions directed
ATTENTION
towards the prevention of damage to the seal or its
surroundings.
Refers to mandatory instructions designed to
prevent personal injury or extensive damage to the
!
seal or its surroundings.
2. Installation, removal and maintenance of the seal must be carried out
only by qualified personnel who have read and understood these
installation instructions.
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 must
be operated within the recommended performance limits in accordance
with its designated use set out in these installation instructions.

Before Starting the Equipment

1. Check the pump at the coupling for proper alignment of the driver
or motor.
2. Ensure that the gland plate nuts/bolts are securely tightened according
to the pump manual instructions, and that all screws are securely
fastened.
3. Complete the assembly of the pump, and turn the shaft (by hand if
possible) to ensure free rotation.
4. Consult all available equipment operating instructions to check for
correctness of all piping and connections, particularly regarding seal
recirculation/flush, heating or cooling requirements, and services
external to the seal.
This mechanical seal is designed to operate in a liquid so
ATTENTION
the heat energy it creates is adequately removed.
Therefore, the following check should be carried out not
only after seal installation, but also after any period of
equipment inactivity.
5. Check that the seal chamber fluid lines are open and free of any
obstruction, and ensure that the seal chamber is properly vented
and filled with liquid - refer to the pump instruction manual.
TYPE 5620/5620P
DUAL O-RING CARTRIDGE SEAL
Installation, Operation & Maintenance Instructions
These instructions are for the installation and operation of a
ATTENTION
seal as used in rotating equipment and will help to avoid
danger and increase reliability. The information required may
change with other types of equipment or installation
arrangements. These instructions must be read in conjunction
with the instruction manuals for both the pump 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 manufacturer, as appropriate.
John Crane mechanical seals are precision products and must
ATTENTION
be handled appropriately. Take particular care to avoid damage
to lapped sealing faces and to flexible sealing rings. Do not
excessively compress the seal before or during installation.
5. If the pumped 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 seal installation.
6. Fluorocarbon components should never be burned or incinerated as
the fumes and residues are highly toxic. If fluorocarbons are accidentally
heated above 400˚C/750˚F, they can decompose. Protective gloves
should be worn as hydrofluoric acid may be present.
7. PTFE components should never be burned or incinerated as the
fumes are highly toxic.
Dry-running - often indicated by a squealing noise from
ATTENTION
the seal area - will cause overheating and scoring or other
damage to the sealing surfaces, resulting in excessive
leakage or a much shortened seal life.
!
Before start-up, ensure that all personnel and
assembly equipment have been moved to a safe
distance so there is no contact with rotating parts
on the pump, seal, coupling, or motor.
WARNING: Seal installation should be handled only by qualified
personnel. If questions arise, contact the local
John Crane representative. Improper use and/or
installation of this product could result in injury to the
person and/or harmful emissions to the environment,
and may affect any warranty on the product. Please
contact the company for information as to exclusive
product warranty and limitations of liability.
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