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RT inspection is radiographic flaw detection, used to discover cast steel valve internal porosity, shrinkage and other defects. According to...

In export projects, forged valve body strength is high (tensile strength ≥450MPa), suitable for high pressure (>PN100) European and American...

Cast valve body cost is lower by about 20%-30%, suitable for complex structures, but easy to have blowholes, strength slightly...

Engineering inside often uses two single ball valves replace double ball valve is because maintenance more flexible, single valve failure...

Double ball valve suitable for needs double isolation’s working conditions, like oil gas conveying pressure ≥4MPa or toxic medium pipeline,...

Ball valve leaving factory qualified but on-site leakage often due to installation stress leads to valve body deformation >0.3mm, actuator...

Installation actuator after valve leakage mostly due to torque setting error (deviation >10%), valve stem coaxiality offset >0.5mm or not...

Installing ball valve when need guarantee pipeline coaxiality deviation ≤ 1mm, flange parallelism error ≤ 0.2°, avoid forced alignment produce...

Ball valve before installation should check specification and pressure grade, perform appearance and sealing face inspection and use 0.5MPa air...