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KEYSTONE FIGURE 627PQ BUTTERFLY VALVE
INSTALLATION, MAINTENANCE AND ADJUSTMENT INSTRUCTIONS
Before installation these instructions must be read fully and understood
1 STORAGE AND HANDLING
1.1 Protection
HP butterfly valves are delivered with
protection in accordance with the Engineering
Instructions, to protect the valve seats and disc
from damage. Wrapping and/or covers should
be left in place until immediately before fitting
to the pipe.
1.2 Storage
When valves are to be stored for some time
before being fitted, storage should be in the
original delivery crates or cases. Storage
should be off the ground in a clean, dry indoor
area.
1.3 Handling
1.3.1 Packed valves
The lifting and the handling of the packed
valves in crates should be carried out by
appropriate lifting equipment. If a fork lift truck
is used, appropriate fork hitches are required.
The lifting and handling of packed valves in
cases will be carried out in the lifting points.
The transportation of all packed material
should be carried out safely and according to
the local safety regulation.
1.3.2 Unpacked valves
The lifting and the handling of these valves have
to be carried out by using appropriate means
and by respecting the carrying limits. The
handling must, preferably, be carried out on
pallets, protecting the machined surfaces and
seat to avoid damage.
When lifting the large dimension valves, the
sling and the hooking of the load must be
carried out by using the appropriate tools
(brackets, hook, fasteners) and load balancing
tools in order to prevent the valves from falling
or moving during the lifting and handling.
The valve may be lifted only by slings attached
to the flange holes or valve body; never to the
actuator or the valve opening.
2 INSTALLATION
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.
3. Personnel trained in all aspects of manual and
mechanical handling techniques may carry out
handling of the 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 that valve pressure /temperature
limitations marked on the identification tag are
within the service conditions.
6. Ensure that valve materials are compatible
with the pipeline fluid
2.1 Valve inspection
1. Carefully remove the valve from the
shipping package (box or pallet) avoiding any
damage to the valve or, in case of automated
valves, to the electric or pneumatic/
hydraulic actuator or instrumentation.
2. Confirm that the materials of construction
listed on the valve nameplate are
appropriate for the service intended and are
as specified.
3. It is not allowed to use third party spare
parts. In case of third party spare parts, safe
operation is not guaranteed.
2.2 Flange and pipe compatibility
Check matching of flange drilling pattern of
valve and pipe before assembly.
Flanges have to meet the following
requirements:
-The face inside diameter should be:
D min.: The valve J-dimension plus adequate
disc clearance.
D max.: The inside diameter (ID) of standard
pipe before assembly.
Pipline
J
D max/ min
Valve application to be within the pressure/
temperature limits indicated in the P/T diagram.
Essential points and functions of the valve
should be inspected on a regular basis.
Disc
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VCIOM-14782-EN 19/11
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KEYSTONE FIGURE 627PQ BUTTERFLY VALVE
INSTALLATION, MAINTENANCE AND ADJUSTMENT INSTRUCTIONS
2.3 Valve Installation
1. Handling and lifting of the valves during
installation must be performed following
the same instructions described in previous
paragraph “1.3 Handling”.
2. Valve is not a support stand. Do not use it as
a support part of the pipe line construction.
3. While butterfly valves are not used, valve
disc shall be opened slightly (4° - 5°)
to guarantee that the sealing surfaces
will not be damage during storage and
transportation.
4. When welding connecting flanges onto pipe,
butterfly valve shall not be put between
these being weld parts in case the principal
and auxiliary sealing rings are burnt.
5. Before butterfly valve is installed, foreign
materials shall be rinsed out of pipeline.
6. For optimum valve control and smooth
performance, it is recommended to have
a straight pipe with 10 to 20 times of valve
DN for running inlet flow and a straight pipe
with 3 to 5 times of valve DN for running
outlet flow.
7. While installing butterfly valve, make sure
the centerline of the valve coincides with
that of the pipeline in case that the disc can
not be opened and will touch pipeline wall
and damage sealing surfaces.
8. Valve shall be installed according to the
water flow direction. On special occasions,
please contact factory technology
department.
9. After the valve installing is finished and
before it is open to water, the valve shall be
opened and pipeline shall be rinsed with
maximum flow repeatedly in case weld slag
or other foreign things are left in pipeline
and damage the sealing surfaces.
10. It is not permitted to let hot weld slag drop
to sealing parts of valve. While installing
a butterfly valve crosswise (the valve
centerline is perpendicular to horizontal
plane), the valve shall be completely opened.
11. Because dry friction can cause quality
variation of rubber seal, to prolong the life
span of valve, if there is no water in pipeline,
please do not close the valve.
12. For valves from DN 350 through DN 1400,
worm gear box and driving shaft of valve
are linked by key. While mounting worm
gear box to valve, take care to guarantee its
correct mounting position.
13. Adjacent piping must be positioned so that
minimal piping stresses are transmitted to
the flanges during or after installation.
NOTES
The valve can be installed in the pipe-line either with
or without the actuator mounted on top of the valve.
Make sure that you can turn the disc cautiously so you
can feel a mismatch resulting from a disc touching of
the adjacent piping.
Handling and lifting of the valve during installation
MUST be performed following the same instructions
described in previous paragraph “1.3 Handling”.
IMPORTANT
Mating flange faces should be in good condition
and free of dirt and/or inclusions. Both pipe
insides shall be well cleaned.
2.3.1 Installation
1. Check whether the distance of facing
pipe flanges meets the valve face-to-face
dimensions. Spread with adequate tooling
the flanges for easy insertion of the valve.
2. Insert some flange bolts in the pipe flanges,
to help you bear the valve after insertion.
3. Close the valve so far, that the disc-edge is
at least 10mm within the body.
4. Insert the valve between the flanges, center
the valve body and insert all flange bolts.
Tighten the flange-bolts tight by hand.
5. Slowly open the valve completely. (The disc
is in line with keyway in stem head.)
6. Maintain the valve flange alignment while
gradually removing the flange-spreads and
tighten the flange-bolts tight by hand.
7. Slowly close and open the valve to check for
adequate disc clearance.
8. Cross-tighten all bolting to the proper
torque. Do not over tighten.
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KEYSTONE FIGURE 627PQ BUTTERFLY VALVE
INSTALLATION, MAINTENANCE AND ADJUSTMENT INSTRUCTIONS
2.4 Valve verification
Check the operation of the valve by operating it
to “full open” and “full close”. To verify the valve
operation, the disc position indicator on the
actuator or the handle should rotate between
the “full open” and “full close” indicators on
the actuator or orientation plate. Generally, the
valve disc travels clockwise to close.
2.5 Sources of possible danger
This section contains some examples of
possible foreseen danger sources.
2.5.1. Mechanical
When manual operators are used, available
space should be checked in order to avoid being
clamped of hands.
2.5.2. Electrical
If static charges can initiate explosions, the
valve should be grounded.
2.5.3 Thermal
If the valve is used in applications with a fluid
temperature above 40°, the outside of the body
might be hot. Sufficient measurements should
be taken to avoid burning.
A manual operated valve should be opened
and closed with sufficient protection for the
personnel operating the valve. For example:
protecting gloves.
3 MAINTENANCE
WARNING
Depressurize and, if necessary in case of
dangerous fluid, drain the line and flush with
appropriate cleaning fluid before starting any
maintenance. 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 personnel trained in all aspects of manual
and mechanical handling techniques may carry
out valve handling.
3.1 Routine maintenance
Routine maintenance or lubrication is not
required other than periodic inspection to
ensure satisfactory operation and sealing.
3.2 Removing the valve
1. Turn the disc to nearly closed position. (The
disc is in line with the keyway in the stem).
2. Loosen all flange bolts and remove the
bolts, which prevent removing of the valve.
3. Spread the flanges with adequate tooling,
and remove the valve.
2.5.4 Operational
Closing a valve too fast may result in water
hammer in the upstream part of the pipeline.
Water hammer results in excessive stresses in
the valve and will cause severe damage.
Water hammer should be avoided in all
circumstances.
Due to differential pressure across the valve
disc, butterfly valves have the tendency to be
closed by the flow. Take care when unlatching
the valve operating mechanism.
2.6 TROUBLESHOOTING GUIDE
Symptom Possible cause Resolution
Gearbox select size improper and cannot drive the disc rotating Renew to select type
Actuator has failed Replace or repair
Valve would not rotate
Valve leaking
Jerky operation
Valve disc connection pins are broken Replace new pins
Valve packed with debris Flush or clean valve to remove debris
Gearbox and main shaft connective key is cut off which is due to over torque Disassemble the gearbox, then replace key
Valve not fully closed Close valve
Debris trapped in valve Cycle and flush(with valve open )to remove debris
Seat is damaged Replace seal
Extreme dry application Put some silicon oil on seat or increase size of actuator
Air supply actuator inadequate Increase air supply pressure and/or volume
The F627 butterfly valves are designed to require a minimum of maintenance.
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KEYSTONE FIGURE 627PQ BUTTERFLY VALVE
INSTALLATION, MAINTENANCE AND ADJUSTMENT INSTRUCTIONS
3.3 Valve disassembly (See figure 1 and 2)
1. Turn actuator hand wheel counterclockwise
to let disc be at 3° (The intersection angle of
disc and body end face) open position.
2. Unscrew and remove hexagonal bolts
connecting actuator to valve body, and then
remove actuator.
3. Unscrew and remove internal-hexagon set
screws connecting cover plate to valve body,
then remove cover plate.
4. Unscrew and remove hexagonal-head bolts
connecting lower end cover to valve body,
then remove lower end cover.
5. Remove back up ring and o ring of main
shaft dead end.
6. Remove thrust bearing, adjust washer,
washer and o ring of assistant shaft dead
end.
7. Remove with-internal-screw cylindrical pins
connecting main and assistant stems to
disc.
8. Pull out main and assistant stems by using
a twisting motion.
9. Disc removal:
There is interference between disc and ring
seat, to remove disc out of body, operate to
following procedure:
Fix body first, lift disc slowly by two eyebolts,
then move disc away.
10. There is a self-lubrication bushing and
sealing components in upper body bore and
lower body bore respectively. Generally, no
need of removing them in conducting above
operations.
3.4 Valve assembly (See figure 1 and 2)
1. Clean all components and parts.
2. Apply silicon grease on disc sealing surface
and on outsides of main stem and assistant
stem to facilitate assembly.
3. Insert main shaft and assistant stem into
the corresponding body bore respectively,
using a twisting motion.
4. Using two eyebolts lift disc and put it into
the inside of valve body, meanwhile, make
the disc’s axial hole in line with main and
assistant shaft, and then fit it together.
5. Assemble cylindrical pin with internal
thread to connect stem and disc tightly,
at the same time, to drop some certain
quantity Loctite in disc’s pin hole.
6. Assemble o ring, back up ring and cover
plate of main shaft end side to body, then
tighten this retaining plate by using set
screw.
7. Assemble o ring, back up ring, adjust
washer, thrust bearing and lower end cover
of assistant shaft end side to body, and then
tighten this lower end cover by using bolt
and set screw with flat point.
8. Assemble actuator by connecting it to body
upper end flange with bolts.
9. In actuator operating, make certain: If turn
hand wheel clockwise, valve is dosed; If
turn hand wheel counterclockwise, valve
is opened. If valve is fully closed, indicator
points to word “Fully closed”; if valve is
fully opened, indicator points word “Fully
Opened”.
FIGURE 1
4
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KEYSTONE FIGURE 627PQ BUTTERFLY VALVE
INSTALLATION, MAINTENANCE AND ADJUSTMENT INSTRUCTIONS
Parts and parts name drawing
Gear box with handle
Set screw
Cover plate
Back up ring
O-ring
Main shaft
Spring washer
Bolt
Body
Assitant shaft
Key
Bearing
Plain washer
Plug
Locking washer
Formed pin retainer
Pin
Seat
FIGURE 2
Adjust washer
Nut
Plain washer
End cover bolt
Set screw with flat point O-ring Lower end cover Thrust bearing
Disc
Fasteners
Pin retainer
Spacer
O-ring
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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
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