ANDERSON GREENWOOD
TYPE 9300H PILOT OPERATED PRESSURE RELIEF VALVE
INSTALLATION AND MAINTENANCE INSTRUCTIONS
Emerson.com/FinalControl
© 2018 Emerson. All rights reserved.
VCIOM-04545-EN 18/05
Before installation these instructions must be fully read and understood
GENERAL DESCRIPTION
WARNING
Failure to follow the installation, operation or
maintenance instructions for a Emerson product
could lead to serious injury or death from explosion
or exposure to dangerous substances.
To reduce the risk:
• Comply with all information on the product, in
this manual, and in any local and national codes
that apply to this product.
• Do not allow untrained personnel to work with
this product.
• Use Emerson parts and work procedures
specified in this manual.
The protection and safety of equipment, property
and personnel depends on the proper operation
of the pressure relief valves described in this
manual. All Emerson pressure relief valves
should be kept in proper working condition in
accordance with the manufacturer’s written
instructions. Periodic testing and maintenance
by the user of this equipment is essential for
reliable and safe valve operation.
All installation, maintenance, adjustment, repair
and testing performed on pressure relief valves
should be done by qualified technicians having
the necessary skills and training adequate to
perform such work. All applicable Codes and
Standards, governing regulations and authorities
should be adhered to when performing pressure
relief valve repair. No repair, assembly,
adjustment or testing performed by other than
Emerson or its authorized assemblers and
representatives shall be covered by the warranty
extended by Emerson to its customers. The
user should use only original, factory supplied
OEM parts in any maintenance or repair activity
involving this product.
WARNING
Personal injury or equipment damage caused by
sudden release of pressure may result if the valve
assembly is installed
where service conditions could exceed the limits
on the appropriate nameplates.
Never use this equipment for any purpose other
than its intended use.
This Manual is provided as a general guide for
the repair and maintenance of the pressure
relief valves described herein. It is not possible
to describe all configurations or variations with
such equipment. The user is advised to contact
Emerson or its authorized assemblers and
representatives for assistance in situations that
are not adequately covered or described in this
manual.
WARNING
Avoid personal injury from sudden release
of process pressure. Before performing any
maintenance operations:
•
Do not remove any component from the valve
while the valve is still pressurized.
•
Always wear protective gloves, clothing, and
eyewear when performing any maintenance
operations to avoid personal injury.
•
Adhere to all safety standards and best
practices for operating the equipment.
•
Disconnect any operating lines providing a
control signal to the pilot.
•
Use bypass valves or completely shut off the
process to isolate the valve from process
pressure. Relieve process pressure on both
sides of the valve. Drain the process media from
both sides of the valve.
•
Use lock-out procedures to be sure that the
above measures stay in effect while you work on
the equipment.
•
The valve may contain process media that are
pressurized, even when the valve has been
removed from the process.
•
Check with your process or safety engineer for
any additional measures that must be taken to
protect against process media.
Before disassembling the pressure relief valve
ensure that the valve has been decontaminated
from any harmful gasses or fluids and that it
is at a safe temperature range for handling.
STORAGE AND HANDLING
Pressure/vacuum relief valve performance may
be adversely affected if the valve is stored for
an extended period without proper protection.
Rough handling and dirt may damage, deform,
or cause misalignment of valve parts and may
alter the pressure setting and adversely affect
valve performance and seat tightness. It is
recommended that the valve be stored in the
original shipping container in a warehouse or
at a minimum on a dry surface with a protective
covering until installation. Sealed inlet and
outlet protectors should remain in place until
the valve is ready to be installed in the system
Fluids can be trapped in the dome space of pilot
operated pressure relief valves.
Before installation, the Installation and
Operational Safety Instructions should be fully
read and understood. These Instructions may
be requested from the factory or are available
at Emerson.com.
