1. Durable, high output efficiency, wide torque range; 2. Small size and light weight; 3. Each component is safe and reliable, and the operation is stable; 4. Protection grade IP67, explosion-proof grade Exd IIB / CT6; 5. Zero leakage and high holding pressure; 6. Emergency self-protection functions such as power on, off, etc. 7. High-precision position control and speed control to achieve the adjustable characteristics of the valve.