KEYSTONE
Operating and Safety Instructions
PTFE lined Butterfly Valves KeyChem/Figure 24/Figure 26
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.
For end-of-line service, please check the
details in the Maintenance & Installation
Instructions, available via phone number:
+41 (0) 55 254 41 41 or our website:
www.valves.emerson.com
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. Caution must be taken during installation and full responsibility lies with those responsible
for the complete installation. In any case, the local safety regulations must be respected.
3. 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.
4. Only personnel trained in all aspects of manual and mechanical handling techniques must
carry out handling of all valves.
5. Misuse of the valve is not allowed. For example: the valve, handles, actuators or other parts
may not be used as ‘climbing tools’.
6. Pressure and temperature ratings of the valve must be adhered to and need to be checked
with the system specifications. See the Maintenance & Installation Instructions for Pressure/
Temperature diagrams.
7. Ensure that valve materials are compatible with the pipeline fluid.
8. Detailed information for installation and maintenance is available.
Installation
1. Handling and lifting should be performed according the Maintenance & Installation Instructions.
2. For detailed installation instructions refer to the Maintenance & Installation Instructions for the
specific product.
3. Preferred installation position of butterfly valves is the shaft horizontal and the lower disc-edge
opening downstream.
4. Do not use the valve to spread the flanges.
5. 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.
6. Valve operation should be checked for open - close positions.
7. The disc should have enough clearance from the pipeline in all positions.
www.valves.emerson.com
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.
Emerson reserves the right to change the contents without notice NEOJV-0006-EN-1305
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