Greatork is the international-market actuator brand of Tefulong Group (greatork.com), sister brand of the group's domestic AUTORK line (see our AUTORK column). By Greatork's official introduction: an intelligent valve actuator manufacturer founded in 1987, with a 53,000㎡ manufacturing base and annual capacity over 50,000 units; electric, pneumatic and hydraulic actuators spanning 5Nm~6,000Nm; SIL3 functional-safety and IP68 certified; serving six industries — oil & gas, power, port & terminal, water & infrastructure, metals & smelting, general process — across 40+ countries.

Greatork AVA intelligent actuator cutaway (image source: Greatork official website)

Product Map

• AVA multi-turn intelligent actuators (plus AVAMD linear, AVAT/AVAR quarter-turn)
• Intelligent electro-hydraulic actuators
• Gas-over-oil actuators (pipeline-gas driven)
• BA multi-turn and ZJ part-turn gearboxes

Milestone Projects

The East Route is among the world's longest and most strategically significant energy corridors with the highest reliability demands; Greatork also cites major pipelines and storage terminals in 15+ countries including Rosneft and South Pars, meeting SIL3 fail-safe control from -50°C to high-pressure gas fields.

AVAT quarter-turn intelligent actuator (image source: Greatork official website)

Quality and Certification

• 53,000㎡ campus with robotic lines, precision CNC and real-time quality monitoring
• SIL3 functional safety (SIL2/SIL3 electric; SIL2 electro-hydraulic)
• IP68 submersible protection — tested against simulated subsea, corrosive atmospheres and -40°C~+85°C cycling
• 100,000+ operation endurance, vibration, EMC and explosion-proof testing
• Certificates: ISO 9001, ISO 14001, ATEX, CE, SIL, PROFIBUS, LR class

The hero animation on our homepage is the 3D cutaway of the Greatork AVA series. See the AVA/AVAT article and the electro-hydraulic/gas-over-oil article in this column.