The AVA series is Greatork's (the export brand of Tefulong Group) multi-turn intelligent actuator for gate valves, globe valves and similar multi-turn duties; the same platform offers AVAT/AVAR quarter-turn and AVAMD linear variants. The 3D cutaway animation on our homepage shows this series (below is the same animation — please update your browser if it does not play).

AVA series 3D cutaway animation (image source: Greatork official website)

Product Overview

• High-precision large-scale digital integrated chips as the control core — precise, stable torque and thrust control
• Non-intrusive infrared setting: all parameters settable via IR tool without removing the electrical cover, greatly simplifying commissioning
• Historical data recording: torque, status and alarms recorded in real time on a timeline for tracing and analysis
• Precision valve-position measurement with 0.5% accuracy
• Accurate torque measurement via pressure sensors measuring the reaction force on the motor worm thrust
• HD OLED digital/identifier display window with unique backlight for clear night observation and setting
• Dynamic braking: irreversible worm-gear transmission provides reliable braking against motor coasting
• Compact worm-gear reducer with large ratio; motor shaft and worm independent for quick replacement
• Multiple protections: motor over-heat, over-current, phase loss, valve jamming, torque protection & measurement, ESD and automatic inspection
• Fieldbus: seamless interface with any main control system and protocol

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

AVAMD linear actuator (image source: Greatork official website)

Technical Specifications (official)

Track Record

105 AVA/AVAT units serve the China-Russia East-Route pipeline (Power of Siberia, PipeChina); 103 units serve PSO terminals in Pakistan — the series is proven at scale in pipeline and storage service.