KEYSTONE PED - OPERATING AND SAFETY INSTRUCTIONS
RESILIENT SEATED BUTTERFLY VALVES
Before installation, these instructions must be fully read and understood
HAZARD POTENTIALS
• Disregarding of instructions
• Improper use of product
• Insufficiently qualified personnel
Ensure that valve materials are compatible with
the pipeline fluid.
Valve application to be within the pressure/
temperature limits indicated in the P/T diagram
of the Product Manual.
If in doubt contact factory.
Check the valve’s functionality on a regular
basis.
When the valve is used in an end-of-line
function, PED Cat-I applications are allowed
only. For other categories, contact factory.
Tagplate
Nominal
diameter
designation
model code
Min.& max.
temperature
Max. permissible
working pressure
Product
Trim
designation
Flange
compatibilty
(drilling)
Body material
of construction
Serial
number
Year of
construction
Identification
number of
notified body
PRECAUTIONS
WARNING
For safety reasons, it is important to take the
following precautions before you start work on
the valve:
1. Personnel making any adjustments to the
valves should utilize suitable equipment.
All required personal protection means should
be worn.
2. The line must be depressurized before
installing the valve. In case of dangerous
pipeline fluids, the pipeline should be drained
and flushed properly with an appropriate
cleaning fluid.
3. Personnel trained in all aspects of manual and
mechanical handling techniques must carry
out handling of all valves.
4. Misuse of the valve is not allowed.
For example: the valve, handles, actuators or
other parts may not be used as ‘climbing tools’.
5. Ensure the valve pressure/temperature
specification as indicated on the identification
label, is within the pressure/temperature
limits of the application. A full pressure/
temperature diagram can be obtained from
the Product Manual. With the use of the figure
and trim number on the valve’s identification
label, the correct diagram can be found.
6. Ensure that valve materials are compatible
with the pipeline fluid.
INSTALLATION
1. Handling and lifting should be performed
according the Maintenance and Installation
Instructions.
2. Keystone valves are bi-directional unless
fitted with a flow direction arrow. If a
directional arrow is fitted then the valve
must be installed with the arrow pointing in
the direction of the flow.
3. For detailed installation instructions
refer to the Maintenance and Installation
Instructions for the specific product.
4. Preferred installation position of butterfly
valves is the shaft horizontal and the lower
disc-edge opening downstream.
5. Do not use the valve to spread the flanges.
6. Instructions whether to use or to omit flange
gaskets are stated in the Maintenance and
Installation Instructions.
7. In case the valve is used as spool piece
during erection of piping, do not finish weld
the flanges to the pipes with the valve bolted
between the flanges as this will result in
serious heat-damage to the seat.
8. Valve operation should be checked for
open - close positions. The disc should have
enough clearance from the pipeline in all
positions.
9. In case of CompoSeal valves:
a. Do not overtighten the flange screws.
See the specific Installation and
Maintenance Instructions for maximum
allowable bolting torque.
b. Do not use CompoSeal valves in area’s
sensitive to earthquakes.
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VCOSI-00754-EN 20/01
KEYSTONE PED - OPERATING AND SAFETY INSTRUCTIONS
RESILIENT SEATED BUTTERFLY VALVES
MAINTENANCE
!! Read all warning labels fitted to the valve
before operation or maintenance !!
Check the valve’s functionality on a regular
basis.
No additional routine maintenance is required.
REPAIR
WARNING
The line must be depressurized before carrying
out any repairs to the valve. In case of dangerous
pipeline fluids, the pipeline should be drained
and flushed with an appropriate cleaning fluid.
Failure to do so may cause serious personal
injury and/or equipment damage. Before
disassembling the valve ensure the valve has
been decontaminated correctly from any harmful
gasses or liquids and that it is within a safe
temperature range for handling. Personnel
making any adjustments to the valves should
utilize suitable equipment. All required personal
protection means should be worn. Only qualified
personnel trained in all aspects of manual and
mechanical handling techniques must carry
out lifting and handling of valves. Use Keystone
original spare parts only. For detailed information
on valve (dis)assembly and part replacement, refer
to the Maintenance and Installation Instructions.
© 2009, 2020 Emerson Electric Co. All rights reserved 11/20. Keystone is a mark owned by one of the companies in the Emerson Automation Solutions business unit of
Emerson Electric Co. The Emerson logo is a trademark and service mark of Emerson Electric Co. All other marks are the property of their prospective 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.
Emerson Electric Co. does not assume responsibility for the selection, use or maintenance of any product. Responsibility for proper selection, use and maintenance of
any Emerson Electric Co. product remains solely with the purchaser.
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