Appendix C. Main Parts to be Replaced
Parts of this actuator can be used for a long period of time, but the following parts should be
replaced at every periodic inspection.
Valve body
Gland packing
Gasket
Actuator
• Diaphragm: Every five years
• Bushing: Every five years
• Cap: Every five years
• Sealing washer: Every five years (and whenever disassembling)
• Dust seal: Every five years (and whenever disassembling)
• Rod seal: Every five years (and whenever disassembling)
C-1