AirSep AS-Q, Instruction Manual

Page: 131 / 198

AS-Q—AS-Z Series Instruction Manual 131
AirSep Corporation
WARNING:
WHEN HANDLING THE VALVE OR VALVE/ACTUATOR ASSEMBLY,
TAKE ITS WEIGHT INTO ACCOUNT!
NEVER LIFT THE VALVE OR VALVE/ACTUATOR ASSEMBLY BY THE
ACTUATOR, POSITIONER, LIMIT SWITCH OR THEIR PIPING. PLACE
LIFTING DEVICES SECURELY AROUND THE VALVE BODY. FAILURE
TO FOLLOW THESE INSTRUCTIONS MAY RESULT IN DAMAGE OR
PERSONAL INJURY FROM FALLING PARTS (SEE FIGURE 5).
WARNING:
BEWARE OF NOISE EMISSIONS!
THE VALVE MAY PRODUCE NOISE IN THE PIPELINE. THE NOISE
LEVEL DEPENDS ON THE APPLICATION. OBSERVE THE RELEVANT
WORK ENVIRONMENT REGULATIONS ON NOISE EMISSION.
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 closed 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 disc 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! RECOMMENDED FASTENER LENGTHS ARE
LISTED IN BULLETIN T104-1.
The valve may be installed in any position and offers
tightness in both directions. For lowest operating torque
it is recommended, however, that the valve be installed
with the body insert towards the higher pressure, (shaft
downstream).
1. Read all WARNINGS!
2. IMPORTANT: Only operating handle stops or actuator
stop screws must be used to stop the disc position. DO
NOT use the “positive stop” by itself to limit travel.
3. Visually check the position of the disc when valve is in
the closed position and the insert is fully compressed.
The disc should be parallel to the flanges within 1/32”
(0.79mm).
4. Before installing a closed valve in the pipeline, be
sure that the handle or actuator is attached so that a
counter-clockwise rotation, viewed from above, opens
the valve (See Figure 1). Fully close the valve again
before installing in the pipeline.
5. The Wafer-Sphere butterfly valve must be centered
between flanges to avoid disc-pipe contact which
could damage the disc and shaft. Any flange or
pipeline welding should be done prior to installation
of the valves. If this is impossible, protective covering
or shields must be placed in the pipeline between the
valve and the area being welded prior to welding. Not
only must the valve be protected against weld slag, but
also against any excessive heat, which could cause seat
damage. It is essential that all weld slag, rods, debris,
tools, etc., be removed from the pipeline before valves
are installed or cycled.
6. 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 6).
Lifting the valve
Figure 5
IMO 1/18
IMO-308 EN 5