Azbil VDD Series, Руководство пользователя

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Installation Precautions
WARNING
If the rated pressure or standards for connection are ignored when this device is used,
damage to the product or leakage may cause a serious accident.
When connecting the valve to the piping, do not put your hand or foot under the valve or
between flanges. You may lose your fingers or your foot may be injured.
Before reinstalling the valve after maintenance or modification, wash out any residual fluid in
the pipes or replace it with a safe fluid. Otherwise, the residual fluid may cause an injury.
CAUTION
Make sure that there is a straight pipe section at least 10 times the pipe diameter on the
upstream side and 6 times the pipe diameter on the downstream side (D: nominal diameter).
If the straight pipe sections are not long enough, insufficient valve capacity or unusual noise
or vibration could result.
Install the valve in the correct direction, leaving clearance around the valve as much as
possible for easy maintenance (piping, wiring, adjustment, etc.).
Provide appropriate support for the valve itself and for connected pipes to prevent an
excessive load from the weight and operation of the valve. (Care is needed especially for large
valves and valves for low-temperature fluid.)
If the valve is installed along a passageway used by outsiders, install a fence or cover as a
protective measure.
Do not install the valve where it may be submerged by rainwater, covered with snow, or
subject to freezing. Otherwise the valve might be damaged.
If the valve is exposed to radiant heat, provide a shielding plate or the like. Failure to do so
may result in damage to the actuator or auxiliary equipment.
If the valve is exposed to salt or a corrosive atmosphere, take measures against corrosion.
Otherwise the valve might be damaged.
Check that there is no damage to the valve (including the actuator and auxiliary equipment).
Check that there is no damage to the flanges or welded piping.
Otherwise fluid leakage could result.
If pipe flanges connected to the valve are being welded, the valve surface may also heat up.
Do not touch the valve unnecessarily.
Chamfer the edges of the pipe flanges. Sharp edges can cause an injury.
Check that the pipes on both sides of the valve are firmly supported. Insufficient support may
cause leakage from pipe connections.
After installation, check that the pipes are still properly aligned. Misalignment may cause
fluid leakage from pipe connections.
Install the butterfly valve with the valve (blade or disk) fully closed. Otherwise the valve
might be damaged.
If the eyebolts (eyenuts) attached to the actuator are used to hoist the valve, make sure that
the weight does not exceed the limit specified in the user’s manual. An excessive load may
damage the actuator or cause air leakage.
Handling Precautions