Neles PB2 Series, Installation Maintenance And Operating Instructions, Page: 4 / 12

1PB270EN - 10/2020 4
2. TRANSPORTATION AND
STORAGE
Check the valve and the accompanying devices for any damage
that may have occurred during transport.
Store the valve carefully. Store indoors in a cool, dry place.
Do not remove the flow port protectors until installing the valve.
Move the valve to its intended location just before installation.
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 GASKETS AND FASTENERS
COMPATIBLE WITH THE APPLICATION, AND IN
COMPLIANCE WITH APPLICABLE PIPING CODES
AND STANDARDS. CENTER THE VALVE AND FLANGE
GASKETS CAREFULLY BETWEEN FLANGES. DO NOT
ATTEMPT TO CORRECT PIPELINE MISALIGNMENT BY
MEANS OF FLANGE BOLTING!
The valve may be installed in any position and offers tight
shut-off in either flow direction. When in a horizontal line, it is not
recommended to install a valve with the stem on the underneath
side as debris in the pipeline may enter the body cavity and damage
the gland packing.
Refer to Section 4, MAINTENANCE for gland packing adjustment. If
there is seepage past the gland packing 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 MAINTENANCE section.
3.3 VALVE INSULATION
Neles™ ball valves do not require insulation. If desired, the valve
may be insulated; however, the insulation must not continue above
the upper level of the valve. See Figure 2.
Figure 2. Insulation of the valve
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 7 OR IN THE
SEPARATE ACTUATOR INSTRUCTIONS.
The actuator should be installed in a manner that allows plenty of
room for its removal.
The actuator must not touch the pipeline, tanks, walls, or other
equipment because vibration may interfere with its operation.
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(s)
are correctly adjusted. Actuator adjustment is in Section 5. To
adjust any accompanying device(s) refer to the separate control
equipment instruction manuals.
4. MAINTENANCE
4.1 GENERAL
Although Neles™ valves are designed to work under severe
conditions, proper preventative maintenance can significantly help to
prevent unplanned downtime and reduce the total cost of ownership.