(5) The internal self tightening connection described above is to eliminate the medium pressure with the help of external force to achieve the sealing effect, while the "internal self tightening" connection is to use the medium pressure for self tightening. A knowledgeable friend will surely know that its sealing ring is loaded on the inner cone, and the side facing the medium will form an angle, and then the pressure will be transmitted to the inner cone and the sealing ring. 　　

Precautions for installation of electric ball valve:
1. Remove the protective covers at both ends of the flange end, and flush and clean the flow hole when the ball valve is completely opened. 　　　　
2. The ball valve opened and closed by the actuator shall be tested according to the standard signal (electricity or gas) (to prevent vibration during transportation from affecting the service performance), and the equipment can be put on line only after it is qualified (wiring shall be in accordance with the circuit diagram of the electric actuator). Ball valves for control use
3. Please do not use the actuator part of the valve as the lifting point during the equipment to prevent damage to the actuator and accessories. 　　　　
4. When equipment is used, the ball valve shall be in the horizontal or vertical direction of the pipeline. 　　　　
5. The pipeline adjacent to the equipment point shall not sag or bear external force, and the pipeline support or support can be used to eliminate the violation of the pipeline. 　　　　
6. After connecting with the pipeline, please insert and lock the flange connecting bolts with regular torque to ensure the equipment is safe and correct.