Azbil ACN Series, Руководство пользователя

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14-1
Chapter 14. Recommended spare parts
It is recommended to replace the following parts when servicing the control valve.
Valve Body
Be sure to replace the following parts with new ones whenever the valve body is disassembled:
• Gland packing
• Gaskets
The frequency of replacement of seal ring or scraper ring differs drastically depending upon
such conditions as type of flow fluid, fluid temperature or pressure. As a general rule, replace
them once every 100,000 full stroke cycles or once every three years.
The frequency of replacement of carbon ring differs drastically depending upon such
conditions as type of flow fluid, fluid temperature or pressure. As a general rule, replace them
once every totalized stroke of 2.5 km or once every three years.
Actuator
Replace the following parts at every 5 years or thereabouts:
Diaphragm
Bushing
Seal washer
Be sure to replace these parts whenever the actuator is dissembled
Dust seal
Rod seal
Of the bellows sealed type of control valves, the bellows seal assembly* must be replaced
periodically. The period of replacement depends on temperature, pressure and order
conditions of use. A typical service longevity of the bellows assembly is 10,000 vertical stroke
cycles.
Note: *The bellows seal assembly has the seal bellows and valve stem (including the bellows
seat) assembled together.
Please mention the parts name and the product number indicated on the name plate when
ordering spare parts.