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KEYSTONE SLURRY CONTROL VALVES
FIGURE 2000
Installation and commissioning instructions for Figure 2000 slurry control valves
STORAGE INSTRUCTIONS
To protect disc edges during storage or installation/removal, ensure disc is in the closed position.
The valve faces should be adequately protected against damage and coated with corrosion
inhibitor even when stored under cover.
FLANGE AND PIPE COMPATIBILITY
Em
erson valves are suitable for installation between most international standard flange systems
of AS 2129/ASME 150 rating. Refer valve literature sheet for standard drillings.
Weld neck flanges (flange ID approximates valve bore) are recommended to ensure maximum
valve performance. However, slip-on flanges may be used.
CAUTION
Do not weld near the valve, as this will result in serious damage to the valve.
INSTALLATION
1. Ensure that the flanges are clean, undamaged and compatible with the valve.
2. Spread the flanges to allow sufficient clearance for the valve.
Do not use the valve as a crow bar.
3. Loosely fit two bolts at the bottom of the flanges to bear the weight of the valve.
4. Close the valve so that the disc edge is within the body (about 5° open).
5. Insert the valve between the flanges.
6. Loosely fit the remainder of the flange bolts.
7. Center the valve and ensure the flanges are properly positioned.
8. Hand tighten all the flange bolts.
9. Slowly open the valve fully and check for adequate disc clearance. (The disc is in line with the
parallel flats or keyway in the stem).
10. Cross-tighten all the flange bolts.
SAFETY PRECAUTIONS
Whenever a valve is being installed or removed
from the pipeline, ensure the line is not
pressurized and any hazardous medium is
drained away.
GENERAL
Keystone butterfly valves are bi-directional
and will control flow in either direction of
flow. In most horizontal pipe installations it is
recommended that the valve be installed with
its shaft horizontal and the lower disc edge
opening downstream, particularly on slurry or
sedimentary duties.
Do not use flange gaskets or sealing
compounds. The Keystone butterfly seat-face
design eliminates the need for gaskets.
MAINTENANCE
Routine maintenance or lubrication are not
required.
ACTUATOR MOUNTING INSTRUCTIONS
The F79U pneumatic actuator is mounted directly to the valve top plate with four studs, nuts and
washers. The actuator is normally installed parallel to the pipeline.
1. Ensure that the valve and actuator are in the fully closed position (the drive shaft keyway
perpendicular to the actuator piston-cylinder axis). The valve shaft flats should be parallel to
the disc and the keyway in line with the disc.
2. Check that the actuator mounting studs are tightly installed in the actuator housing. (On
models with two mounting bolt circles, check that the mounting studs correspond to the valve
top plate mounting holes).
3. Install the correct boss (if required) and mount actuator on the valve.
4. Install a lockwasher and nut on each mounting stud and tighten.
5. Connect an appropriate air supply to the actuator, this unit normally requires a 550kPa clean,
dry air supply.
7. The F79U pneumatic actuator is factory lubricated and requires no maintenance.
© 2012 Emerson plc. All Rights Reserved.www.valves.emerson.com
VCIOM-02907-EN 15/10
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© 2017 Emerson. All rights reserved.
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