ROPAC COMPONENT SEALS
Installation, Operation & Maintenance Instructions
1
TYPE R33/34/50
1. Foreword
This instruction manual contains standard, generic data and should be
used with the seal family installation instructions. These instructions
must be read and applied whenever work is done on the seal and must be
kept available for future reference.
ATTENTION
These instructions are for the installation and operation
of a seal 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 arrangements. This manual
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.
ATTENTION
John Crane mechanical seals are precision products and
must 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.
2. Safety Instructions
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.
ATTENTION
Refers to special information or instructions directed
toward 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.
1. Installation, removal and maintenance of the seal must be carried
out only by qualified personnel who have read and understood these
installation instructions.
2. 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.
3. 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 and the instructions set out in
these instructions.
4. 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.
5. 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.
6. PTFE components should never be burned or incinerated as the fumes
are highly toxic.
3. Hazardous Environments
ATTENTION
Every working practice which compromises safety
must be avoided.
In the event of an operating problem the machine must be switched off
immediately and made safe! Problems must be solved promptly.
Minor emissions will occur during normal seal operation. Depending
on the duty, this emission can appear as a gas, a liquid or a solid. For
emissions that are hazardous or toxic and a safe collection system is
required.
Hot surfaces have to be protected against accidental contact.
In order to avoid unforeseen hazards do not make unauthorized changes to
the sealed fluid, the specific duty or the seal parts.
Some mechanical seals are used in conjunction with an ancillary support
system; this is clarified either by the flush plan description on the seal
arrangement drawing or by contacting John Crane (also see Section 11).
It is important for the safe function of the seal that the support system
is assembled and incorporated into the machine before operation. This
manual should be read in conjunction with the appropriate documentation
for auxiliary systems and rotating machinery.
ATTENTION
Alarm systems are often included in the ancillary
support system and the operator must ensure
appropriate action is taken promptly in the event of
an alarm.
Maintenance with steel tools must be avoided in the presence of
substances classed as explosive group IIC according to
EN 60079-0:2012+A11:2013.
If the machine is being used in a EN 60079-0:2012+A11:2013 Zone 21 or
22, regular cleaning of dust from exterior surfaces is required.
4. Declaration of Incorporation (2006/42/EC)
For each standard product supplied into the EU a Technical File is required
and a Technical Record Sheet, satisfying the needs of 2006/42/EC. When
requested, a Declaration of Incorporation (for which a Technical File
exists) will be raised and signed by a John Crane appointed representative.
