Document No：KE-4032-02 Page：16/19
5. Maintenance/Inspection
Unusual noise may be generated if foreign objects are caught in the valve seat.
Promptly remove foreign objects in the seat. If such objects are left as is, the
seat may be damaged or malfunction.
Leaving unusual piping vibration as is causes malfunction. If unusual vibration is
detected, fix the piping with support or similar to prevent vibration.
① Ball valves and actuators introduced in this manual are all designed
lubrication-free.
② Inspections of all actuated valves must be carried out periodically, and as
frequently as possible to prevent accidental mishaps. Here are the items of
inspections required as a minimum:
１） Check trouble-free opening and closing of valves.
２） Detect any external fluid leakage from valves and piping connections.
３） Check vibration of valves and piping during operation.
４） Inspect loosened bolts and nuts
5-1. Dismantling and Reinstallation
Do not disassemble an energized actuator from a valve, to eliminate concerns of
valve damages and accidental mishaps.
Do not put your fingers or foreign objects such as tools into ports of valves being
fully opened or closed. It may cause injuries or equipment damages.
Before dismantling an actuated valve, ensure to equalize the pressure of the
piping and the valve interior with the ambient pressure. Otherwise, residual
pressure and line fluid may dangerously extrude from the valve bore and cause
accidental mishaps.
