Special Maintenance List
Defects which haveoccurred on the stellite part of the valve seat such as wear, cracks, and erosion can cause leakage.
How to Repair
Repair with cutting and welding machines on site.
Scope
Globe Valve,Gate Valve,Check Valve
Work Period
9 days (Standard number of days)
< Examples >
Before
After
For emergency, perform a local repair. (Emergency Treatment)
How to Repair
Perform a local repair by manual welding method.
Scope
Globe Valve,Gate Valve,Check Valve [ Valve Seat,Valve Disc ]
Work Period
3 days (Standard number of days)
* The valve disc or body will be replaced at the next inspection as it is an emergency treatment.
< Examples (Valve Disc) >
Overlay Welding
Grind the
welded partPT
(Liquid Penetrant Testing)
after grinding