Chapter 2. Installation
2-1. Installation Location
Please observe the following cautions when selecting the installation site for the control
valve.
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 down-
stream 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 aux-
iliary 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.
2-1
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