2.
TRANSPORTATION AND STORAGE
Check the valve and the accompanying devices for any
damage that may have occurred during transport.
Store the valve carefully. Storage indoors in a dry place is
recommended.
Do not remove the flow port protectors until installing the
valve.
Move the valve to its intended location just before
installation.
The valve is usually delivered in the open position.
If the valve(s) are to be stored for a long duration, follow
the recommendations of IMO-S1.
3.
INSTALLATION
3.1
General
Remove the flow port protectors and check that the valve is
clean inside. Clean valve if necessary.
Flush the pipeline carefully before installing the valve.
Foreign objects, such as sand or pieces of welding
electrodes, will damage the ball and seats.
3.2
Installing in the pipeline
WARNING:
THE VALVE SHOULD BE TIGHTENED BETWEEN FLANGES USING
APPROPRIATE GASKETS AND FASTENERS COMPATIBLE WITH
THE APPLICATION, AND IN COMPLIANCE WITH APPLICABLE
PIPING CODES AND STANDARDS. CENTER THE FLANGE GASKETS
CAREFULLY WHEN FITTING THE VALVE BETWEEN FLANGES. DO
NOT ATTEMPT TO CORRECT PIPELINE MISALIGNMENT BY MEANS
OF FLANGE BOLTING!
The valve may be installed in any position and offers
tightness in both directions. It is recommended, however,
that the valve be installed with the insert facing upstream.
It is not recommended to install the valve with the stem on
the underneath side because dirt in the pipeline may then
enter the body cavity and potentially damage the stem
packing (see Figure 3).
Refer to the Section 4, MAINTENANCE for stem seal
adjustment. If there is weepage past the stem seals upon
installation, it means the valve may have been subject
to wide temperature variations in shipment. Leak-tight
performance will be restored by a simple stem seal
adjustment described in the MAINTENACE section.
3.3
Valve Insulation
If necessary, the valve may be insulated. Insulation must not
continue above the upper level of the valve (see Figure 4).
3.4
Actuator
WARNING:
WHEN INSTALLING THE ACTUATOR ON THE VALVE, MAKE SURE
THAT THE VALVE ASSEMBLY FUNCTIONS PROPERLY. INFORMATION
ON ACTUATOR INSTALLATION IS GIVEN IN SECTION 6 OR IN THE
SEPARATE ACTUATOR INSTRUCTIONS.
The actuator should be installed in a manner that allows
plenty of room for its removal.
The upright position is recommended for the actuator.
The actuator must not touch the pipeline, because pipeline
vibration may interfere with its operation.
In certain cases it may be considered advantageous to provide
additional support to the actuator. These cases will normally
be associated with large actuators, extended stems, or where
severe vibration is present. Please contact Metso for advice.
3.5
Commissioning
Ensure that there is no dirt or foreign objects left inside the
valve or pipeline. Flush the pipeline carefully. Make sure
that the valve is fully open when flushing.
Ensure that all nuts, fittings, and cables are properly
fastened.
If so equipped, check that the actuator positioner and/or
switch are correctly adjusted. To adjust any accompanying
device(s) refer to the separate control equipment
instruction manuals.
Figure 3 Avoid this mounting position
Figure 4 Insulation of the valve
IMO 4/18
4
IMO-50 EN
