Valmet Flowrox SKW DN50-600, Инструкция по установке, обслуживанию и эксплуатации

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4SK70EN - 5/2023
6.4 Changing the secondary seal
Follow these instructions if you are to change the secondary
seal while the valve is installed to a pipeline. The actuator,
tower, and gate are removed as one package to get more work
space. Refer to Changing the ring sleeves or Valve dismantling
if further service is required as well.
Part numbers refer to Mechanical structure .
WARNING!
Crushing hazard.
Keep your hands and feet clear of moving parts.
De-energize actuators before maintenance.
1. Depressurize and drain the pipeline.
2. Stroke the valve to fully OPEN position and put the
locking pins (13) on place.
3. Disconnect automatic (electric, pneumatic or hydraulic)
actuator from power supply to prevent injuries.
4. Remove the bolts (5) that attach the tower (3) to the body
(1). Lift the actuator, tower (3) and gate (2) off as one
package. The secondary seal (7) might come up with the
gate (2).
5. Remove the secondary seal (7).
6. Clean the space for the secondary seal (7).
7. Apply recommended silicon lubricant to any inner
contours and outside of the new secondary seal (7) and
push it in the sealing slot. If the secondary seal has a
sealing lip, place it towards valve bore.
Use only silicone based lubricants such as DOW#
111, DOW 4, DOW 44, GENERAL ELECTRIC
COMPOUND G661, AND RHONE - POULENE
RHODORSIL III.
8. Apply recommended silicon lubricant on the chamfered
edge of the gate (2).
9. Lower the actuator, tower and gate package on the body
and fasten with bolts (5).
10. Lubricate valve grease nipples (8) as instructed in
Lubrication .
11. Reconnect automatic actuator to power supply and
remove locking pins (13).
12. Run a few test strokes before the pipeline is pressurized.
6.5 Changing the ring sleeves
To change the ring sleeves, the valve needs to be removed
from the pipeline. Refer to Valve dismantling if further
service is required as well. Part numbers refer to
Mechanical
structure.
WARNING!
Multiple hazards.
Pressurized medium in the pipeline can cause
high pressure injection, scalding, corrosion and
irritation.
Do not disconnect a pressurized valve from a
pipeline.
1. Depressurize and drain the pipeline.
2. Stroke the valve to fully OPEN position and put the
locking pins (13) on place.
3. Disconnect automatic (electric, pneumatic or hydraulic)
actuator from power supply to prevent injuries.
4. Disconnect flushing pipelines from the valve if flushing
is installed.
Use lifting equipment on valves weighing over 25
kg (55 lbs).
5. Remove the flange connection bolts and lift the valve to a
suitable working surface.
6. Lift the ring sleeves (4) out from the valve body and
inspect for visible damage such as cuts, slits or erosion
grooves. Depressions and evident flat spots are also to be
taken as signs of damage.
7. Check if the gate (2) is damaged and needs to be
replaced.
8. Clean the valve body (1).
Use only silicone based lubricants such as DOW#
111, DOW 4, DOW 44, GENERAL ELECTRIC
COMPOUND G661, AND RHONE - POULENE
RHODORSIL III.
9. Apply a thin layer of recommended silicone based
lubricant to the sealing lip and to the outer face of the
new ring sleeves. Insert the sleeves into the valve body -
centering the ring sleeve within the bore.
10. Leave the valve to OPEN position until it is installed and
follow the storage instructions if the valve is placed in
stock.