What is the difference between active and passive electric hard seal wafer butterfly valve in Yongjia County? Commissioning steps of electric control valve: 1. Power on after check. 2. Set small switch 2 to manual state. 3. Adjust the opening and closing directions of travel. When operating switch 1 is turned on, the light should be on, and the motor should stop after the switch is pushed open. When operating switch 1 is off, the light should be off and on, and the motor should stop after the travel switch is jacked open. If not, switch 9 and 10. If the motor switch direction is inconsistent with the manual operation direction, exchange 13 and 15 of the feedback potentiometer. 4. The manual switch 1 makes the actuator run in the closing direction, and the light turns on. After the closing travel contact is jacked off and stopped, rotate the conductive plastic locator to make the feedback current 4 mA. 5. Manual switch 1 makes the actuator run in the open direction, and the light turns on. After the open travel contact is jacked off and stopped, adjust the 100% potentiometer to make the feedback current 20 mA. Generally, repeat twice. 6. Switch 2 is in automatic state, input 4-20mA at ends 3 and 4, input signals at 4, 8, 12, 16 and 20 respectively, and observe the adjustment accuracy. If oscillation occurs, adjust the dead zone potentiometer to increase the dead zone. (The dead zone increases when rotating clockwise) 7. Observe whether the electric braking function is crisp and free from idling. 8. After the over torque switch acts, the motor shall stop, and the self-locking shall be released after operating in the opposite direction.
、 The pressure loss of the electric butterfly valve in the pipeline is large, so the influence of the pressure loss on the pipeline system should be fully considered, the solidity of the butterfly plate to withstand the pipeline medium pressure when closing and the limit of the elastic seat material to withstand the operating temperature under high temperature. The structure length and overall height of the butterfly valve are relatively small, and the opening and closing speed blocks have good fluid control characteristics.
