13-1
Chapter 13. Recommended Spare Parts
It is most recommendable to replace the following parts when servicing the control valve.
Valve body
Be sure to replace the following parts with fresh ones whenever the valve body is disassembled:
Gland packing
Gaskets
Actuator
Replace the following Parts at every 5 years or thereabout.
• Diaphragm
• Bushing
• Seal washer
Be sure to replace these parts whenever the actuator is disassembly.• 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 other
conditions of use. A typical service longevity of the bellows assembly is 10,000 vertical stroke
cycles.
* 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 those spare parts.
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