Installation, Operation & Maintenance Instructions
1
API PLAN 74 STEAM
SEAL SYSTEMS - STEAM
1. General
1.1 Introduction
Plan 74 Steam control panel may only be installed, commissioned and
maintained by an authorized plant machinery specialist, paying close
attention to these instructions and all other relevant regulations. Failure
to do this relieves the manufactures from any liability or warranties.
This Instruction Manual is provided to familiarize the user with the Plan
74 Steam control panel arrangement and its use. The instructions must
be read and applied whenever work is done on the Plan 74 Steam control
panel and must be available to the operating and maintenance personnel.
These instructions will help to avoid danger and increase reliability. They
should be used with the appropriate mechanical seal Instruction Manual.
The following important terms and definitions are used in this document.
1.2 European and/or UK Declaration of Incorporation
(Machinery Directive 2006/42/EC, and UK SI 2008 No. 1597)
If appropriate this is attached.
1.3 European Declaration of Conformity
(Pressure Equipment Directive, 2014/68/EU)
This directive is not applicable to Plan 74 Steam control panel.
1.4 European and/or UK Declaration of Conformity
(ATEX 2014/34/EU, and Equipment and UK SI 2016 No. 1107)
These instructions are intended for use with system operating in
Equipment Group II, category 2GD.
The Declaration covers the complete seal and system and the Maximum
Surface temperature is recorded in the Mechanical Seal Instruction Manual.
If appropriate this is attached.
2. Safety and Environment
The safety notes refer to the system supplied. They can never be exclusive,
and must be used in connection with the relevant safety regulations for the
machine, auxiliary equipment, plant and sealed product.
2.1 Warning symbols
The following symbols are used in this instruction manual to highlight
information of particular importance:
Danger
Mandatory instructions designed to prevent personal
injury or extensive damage.
Warning of electric current
ATTENTION
Special instructions or information to avoid damage to
the system or its surroundings.
NOTE
Information for easy installation and efficient operation.
Environmental note
Compliance is required with any additional warning signs affixed to the system.
2.2 Safety instructions
ATTENTION
Every working practice that compromises personal safety is to be
avoided. All safety requirements in this document must be strictly
adhered to.
In the event of an operating problem, the machinery must be switched off
immediately and made safe! Problems must be solved promptly.
Ensure suitable protective clothing is used when maintaining the system.
Plan 74 Steam control panel systems are commonly used with dual
mechanical seal configurations to reduce the hazard potential from
flammable, explosive, toxic or lethal process fluids. The intermediate,
protective steam barrier, in certain failure modes, may risk being
contaminated by the process fluid. During any maintenance operation
operators must thus assume they will be exposed to the liquid or
gaseous properties of the process fluid and have suitable protective
gloves, clothing, respirators and equipment.
Particular note must be taken of the relevant guidelines for the electrical
installations.
A slight leakage will occur during normal seal operation. Depending on
the duty, this leakage can appear as a gas, a liquid or a solid. In case of
a worn or defective seal the leakage will increase. The leakage may be
hazardous or toxic, and a safe collection system is required.
Surface temperatures above 60°C/140°F should be protected against
accidental contact. The panels may be mounted in a protective enclosure
for this purpose.
The equipment sealed by this seal system must be operated within its
recommended design limits.
Compounds containing PTFE, fluorocarbons and perfluoroelastomers
should never be burnt as the fumes and residues are highly toxic. If this
accidentally occurs protective equipment should be worn as hydrofluoric
acid may be present
Additional equipment/flanges/joint seals used within the system are to
be rated for the appropriate electrical and pressure requirements and are
to be chemically compatible with the buffer gas and process fluid.
•
During venting or draining of the buffer region it should be piped to a
vent or reservoir where it can be safely contained or disposed.
•
All above according to the local legislation.
•
For further information and safe operating limits contact John Crane
•
All periodical maintenance checks have to be in accordance with local
legislation and rules.
All welding or cutting operations are forbidden without permission from
John Crane.
If you are in any doubt please contact your local John Crane office for
further information before proceeding
2.3 Environmental aspects
2.3.1 Company policy extract
“It is the policy of John Crane to manage its business activities in an
environmentally responsible manner, comply with all relevant laws and
regulations, prevent pollution, and continually improve its environmental
performance, certification to the latest issue of ISO 14001 ensures compliance.”
