Azbil VDD Series, User Manual

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vii
WARNING
Before starting work, clean the inside of the valve, replace any residual gas, etc. Otherwise,
the residual fluid may cause an injury.
Do not disassemble the pneumatic actuator while supply air pressure is being applied. The
compressed air may cause an injury.
Because damaged or corroded bolts and nuts may damage the valve and cause injury,
replace them with new ones.
CAUTION
Observe the tightening torques indicated in the user’s manual when tightening bolts and
nuts.
For an actuator that incorporates springs, follow the disassembly procedure when removing
bolts, nuts, etc.
Otherwise, the springs may jump out, causing injury.
When removing the valve from the piping, 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. Otherwise, the valve may fall.
Before removing or attaching the trim (internal valve), check whether a dedicated tool is
necessary. If it is needed, be sure to use it. Otherwise, parts may be damaged.
Assemble the valve using the parts, bolts, nuts, etc., in the order stated in the assembly
procedure. Otherwise, malfunction may result.
When reassembling the valve body, always use new packing and gaskets. The reuse of old
parts will cause fluid leakage.
Hoist
Special tool
Eyebolt
Max. weight
Spring
Precautions for Assembly and Disassembly