Key Specifications/Special Features: 1. Non-intrusive design2. Non-intrusive debugging3. Double sealed structure4. Torque protection5. Valve location limit protection6. Power phase loss protection7. Electronic gate latching protection8. Motor over temperature protection9. Input and output channels with photo electricity insulation10. Detect valve position by Hoare switches11. Automatically phase order adjustment12. Display valve position real time by LCD13. Self diagnosis function14. Manipulation by hand-wheel15. Explosion-proof structure with Exd II CT416. Protection degree: IP6817. Low inertia and high torque motor with F degree18. Worm and turbine operates in an oil bath19. Standard drive interface20. Non-thrust bearing configuration21. Accept voltage, current and pulse signals