Handling Precautions
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 passersby, 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.
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