25
© 2015 Flowrox Oy. All rights reserved.
Contents are subject to change without notice.
SKW/ SKF-2015-09-ENG
6.3
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.
Do not disconnect a pressurized valve from the
pipeline in any case!
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.
Lifting equipment must be used for valves weighing
over 25kg.
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).
Do not use hydrocarbon based grease. Use 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.
DANGER
DANGER
WARNING
