Emerson KEYSTONE 60 Series, Инструкция по установке и эксплуатации, Страница: 5 / 9

5
KEYSTONE SERIES 60 BUTTERFLY VALVES
INSTALLATION AND OPERATION MANUAL
4 MAINTENANCE FOR SERIES 60
RESILIENT SEATED BUTTERFLY VALVES
SIZES DN 50 - 300 (NPS 2 -12)
WARNING!
Depressurize and, if necessary in case of
dangerous fluids, 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.
We recommend that personnel should be trained
in all aspects of these instructions before carrying
out handling of any valve.
4.1 Routine maintenance
The Keystone Series 60 butterfly valves
are designed to require a minimum of
maintenance.
Routine maintenance or lubrication is not
required, we recommend periodic (visual)
inspection to ensure satisfactory operation and
sealing to the environment.
4.2 Removing the valve from the pipe system
1. Turn the disc to nearly closed position.
(The disc is in line with the parallel flats in
the shaft).
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.
4.3 Valve disassembly (see Figure 3)
1. After removal of valve from the piping
system, open the valve fully.
2. Remove the handle or actuator.
3. On sizes 50 mm - 300 mm (2” - 12”), remove
the stem retaining pins (7).
4. Pull out the upper shaft (4).
5. Pull out the lower shaft (5).
6. Remove the disc (3) from the liner (2). Do not
damage the disc edge.
4.4 Valve assembly (see Figure 3)
1. Clean all reusable parts.
2. If valve has bearings (6), tap one in from top
of valve neck flange until it is about 6 mm
(¼”) from top surface. Tap the other in from
inside the body seat bore into the bottom
of the valve neck flange - about 6 mm (¼")
from the bottom surface.
3. Apply a lubricant or soapy solution
compatible with the elastomer to facilitate
assembly.
4. Insert liner (2) into body by pressing it into
the body evenly. Be certain to line up the
shaft holes and to place the elastomer free
phenolic side of the liner so that it contacts
the retention lip in the body when inserted
on lug style bodies.
5. Insert disc (3) in open position into liner.
Make certain broached end of the disc with
internal drive flats, is at the upper stem end
of the body.
6. Coat the upper shaft (4) with a general
purpose elastomer compatible lubricant and
install into body.
7. Install lower shaft (5).
8. Install retaining pins (7) to both shafts.
9. Install the operator.
10. Check assembly by opening and closing the
valve several times.
11. Follow installation instruction for
reinstalling the valve in the piping system.
4.5 Re-installing the valve
See section 3.3.1
7. Remove the liner (2).
Note: Liner can only be removed in the
direction away from the retention lip in the
body (1)
8. If valve has bearings (6), remove by tapping
with blunt instrument.
9. Inspect all components for wear and replace
as required.
3.6 TROUBLESHOOTING GUIDE
Symptom Possible cause Resolution
Valve would not rotate 1. Actuator has failed 1. Replace or repair
2. Valve packed with debris 2. Flush or clean valve to remove debris
Valve leaking 1. Valve not fully closed 1. Close valve, check actuator stop settings
2. Debris trapped in valve 2. Cycle and flush (with valve open) to remove debris
3. Seat is damaged 3. Replace seat
Jerky operation 1. Extreme dry application 1. Put some silicone oil on seat or increase size
of actuator
2. Air supply actuator inadequate 2. Increase air supply pressure and/or volume