CAUTION
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.
Use bolts and nuts that conform to the standards for the pipe flange. Otherwise fluid leakage could
result.
Use new flange gaskets that are appropriate for the properties of the fluid, the operating
temperature, and the pressure. Damaged gaskets may cause fluid leakage.
Open the valve fully before flushing the inside of the piping, and do not change the valve travel
while the pipes are being flushed.
Otherwise, the valve may be damaged by welding spatter or other foreign matter.
When keeping the valve warm or cold, also keep the stud bolts and nuts that connect the valve and
the bonnet warm or cold. Otherwise, fluid leakage due to thermal deformation may occur.
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