Flowserve Logix MD+ ValveSight - Manual (Page 29)

ValveSight™ Diagnostics DTM Manual for Logix MD+ Positioner with HART®
FCD- LGENSF0014-00
© Flowserve Corporation
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Implications: Each cycle represents two reversals of the direction of
valve movement. The cycle counting criterion and count limit are set by
the user to track the usage of the valve.
•
Possible Solutions: Follow routine procedures for maintenance when
the limit is reached such as checking the packing tightness, and
checking linkages for wear, misalignment, and tightness. After
maintenance, reset the cycle accumulator.
Valve Travel
•
Definition: The total accumulated valve travel limit has been
exceeded.
•
Implications: The travel is accumulated in both directions. The travel
counting criterion and limit are set by the user to track the usage of the
valve.
•
Possible Solutions: Follow routine procedures for maintenance when
the limit is reached such as checking the packing tightness, and
checking linkages for wear, misalignment, and tightness. After
maintenance, reset the travel accumulator.
Actuator Cycles
•
Definition: The actuator cycle limit has been exceeded.
•
Implications: Each cycle represents two reversals of the direction of
valve movement. The cycle counting criterion and count limit are set by
the user to track the usage of the valve.
•
Possible Solutions: Follow routine procedures for maintenance when
the limit is reached such as checking the actuator seals and
lubrication. After maintenance, reset the travel accumulator.
Actuator Travel
•
Definition: The total accumulated actuator travel limit has been
exceeded.
•
Implications: The travel is accumulated in both directions. The travel
counting criterion and limit are set by the user to track the usage of the
valve.
•
Possible Solutions: Follow routine procedures for maintenance when
the limit is reached such as checking the actuator seals and
lubrication. After maintenance, reset the travel accumulator.
Bellows Cycles
•
Definition: The bellows cycle limit has been exceeded.
•
Implications: The bellows may be reaching the end of its fatigue
life. Each cycle represents two reversals of the direction of bellows
movement. The cycle counting criterion and count limit are set by the
user to track the usage of the valve.
•
Possible Solutions: Follow routine procedures for maintenance when
the limit is reached such as checking bellows for cracking or
leaking. After maintenance, reset the cycle accumulator.
Bellows Travel
•
Definition: The bellows cycle limit has been exceeded.