ANDERSON GREENWOOD OPERATING AND SAFETY INSTRUCTIONS
HIGH CAPACITY CONSERVATION VENTS (PED)
INSTALLATION
WARNING
• Read these safety precautions first.
• Read and understand this instruction manual
before installing, operating or performing
maintenance on a pressure/vacuum relief valve.
Follow all precautions and warnings noted
herein when installing, operating or performing
maintenance on this equipment.
Before installation these instructions must be read fully and understood
1. Pressure/vacuum relief valves are NOT
bi-directional and therefore are required to
be installed in cohesion with the direction
of the flow. See individual product type for
detailed installation instructions.
2. Remove protective covers from the valve
and end faces and any protection applied to
the valve stem (if applicable).
3. Valves are only suitable for fitting to
horizontal or vertical pipelines.
4. For flanged valves ensure mating flanges
and gaskets are clean and undamaged.
SAFETY PRECAUTION DEFINITIONS
CAUTION
Damage to equipment may result if this
precaution is disregarded. Please see
individual product type for detailed installation
instructions before proceeding.
WARNING
Direct injury to personnel or damage to
equipment may result if this precaution is not
followed.
NOTE
This manual is issued for guidance only and does not
affect our standard terms and conditions and our
product limited warranty, all of which are available
upon request
Maintenance
The relief valve must be isolated from tank
pressure before servicing. All gases must be
blocked and pressure vented safely. Wear
appropriate gloves and /or breathing apparatus
if hazardous vapors are present.
Emerson.com/FinalControl VCOSI-02723-EN 18/03© 2017 Emerson. All Rights Reserved.
Scope
These instructions relate to manual and spring
loaded valves. For individual product designs
see separate instructions.
Operation
See individual operating instructions.
Discharge of process gas must be to a safe
area, which cannot cause damage or injury to
plant or personnel.
All process gases which are hazardous
must either be piped away or, if open to the
atmosphere, the gas must be directed through
an ignition preventative device or some form
of gas modification system, to prevent the
potential ignition of gas within the system.
OPERATION AND ROUTINE MAINTENANCE
Read all warning labels fitted to the valve
before operation or maintenance
Spare parts
When spare parts are required, the customer
should quote the valve size, serial number,
the item number and the material of the parts
required. The valve size and serial number can
be obtained from the identification label. The
item number and description can be obtained
from the general arrangement drawing. Care
should be taken to quote the correct material,
as materials quoted are for non-hazardous
conditions.
5. Should there be any possibility of abrasive
particles (weld, slag, sand etc) within the
piping system this could damage the valve's
seating areas. The system will need to be
flushed clean.
6. Ensure mating pipe flanges are aligned
correctly; bolting should be inserted easily
through mating flange holes. Tighten the
flange bolts in a diagonal pattern.
Routine maintenance
Where routine maintenance is required, other
than periodic inspection to ensure satisfactory
operation and sealing, please see individual
product type. Any sign of leakage from the
flange joint should be addressed immediately
by depressurizing the valve and tightening the
flange bolts gradually and evenly. If no further
adjustment is possible or hazardous leakage
is suspected, thevalve will require a complete
overhaul. This should be carried out after
depressurization and in accordance with the
relevant Maintenance instruction. Only original
spares should be used.
2
ANDERSON GREENWOOD OPERATING AND SAFETY INSTRUCTIONS
HIGH CAPACITY CONSERVATION VENTS (PED)
STORAGE / PROTECTION / SELECTION
Storage
When valves are to be stored for some time
before being fitted, storage should be in the
original delivery crate with any waterproof
lining and/or desiccant remaining in place.
Storage should be off the ground in a clean,
dry indoor area. If the storage is for a period
exceeding six months, the desiccant bags
(ifsupplied) should be changed at this interval.
Protection
Valves are delivered with protection according
to customer’s specification, or with the Quality
Assurance manual, to protect the valve
seats and closure member from damage.
Wrappingand/or covers should be left in place
until immediately before fitting to the pipe.
Selection
Ensure the valve’s materials of construction
and pressure/temperature limits shown on the
identification plate are suitable for the process
fluid and conditions. If in doubt contact the
manufacturer.
Neither Emerson, Emerson Automation Solutions, nor any of their affiliated entities assumes responsibility for the selection, use or maintenance of any product.
Responsibility for proper selection, use, and maintenance of any product remains solely with the purchaser and end user.
Anderson Greenwood is a mark owned by one of the companies in the Emerson Automation Solutions business unit of Emerson Electric Co. Emerson Automation
Solutions, Emerson and the Emerson logo are trademarks and service marks of Emerson Electric Co. All other marks are the property of their respective owners.
The contents of this publication are presented for informational purposes only, and while every effort has been made to ensure their accuracy, they are not to be construed
as warranties or guarantees, express or implied, regarding the products or services described herein or their use or applicability. All sales are governed by our terms and
conditions, which are available upon request. We reserve the right to modify or improve the designs or specifications of such products at any time without notice.
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