Customers often ask about how to choose a suitable drive device for electric ball valves. Let's talk about how to choose the appropriate drive device for electric ball valves.

The electric ball valve is composed of an actuator and a ball valve that have been assembled and debugged to drive the ball valve to move. At the same time, the mechanical position and opening information of the electric ball valve are fed back to the automation system to form an automation control unit. The connection voltages of electric actuators are AC220V, AC380V, and DC24V. When selecting an electric ball valve actuator, different actuators should be selected according to the valve body structure and process conditions to meet control needs. Usually, after determining the valve body structure, torque, and process environment, the following key elements need to be confirmed to determine the final actuator model and function:
1. The driving torque (angular stroke partial rotation and multi rotation) or thrust (straight stroke push-pull action) of the ball valve is increased by 30% of the rated driving torque of the valve to ensure sufficient torque to drive the ball valve action under abnormal conditions or when the driving torque is increased after long-term operation of the valve body structure.
2. Action mode: switch typeElectric Ball ValveOr electrically adjustable ball valve
3. Control signals: switch, 4-20mA, 0-10V and other signals
4. Feedback signals: passive contacts, 4-20mA, 0-10V signals, etc
5. Is it necessary to configure an over torque protector to prevent the valve stem from being broken in the event of valve body blockage.
6. The connection method between the actuator and the valve body (depending on the ambient temperature, whether to increase the bracket or arrange the heat sink)
7. If operating at a low temperature of ≤ -40 ℃, a dehumidification heater needs to be configured.
8. Do you need to configure a handwheel.
The basis for selecting a suitable driving device for electric ball valves is:
1. Select the driving device based on the type, specifications, and structure of the electric ball valve;
2. The opening and closing torque of the electric ball valve;
3. The maximum ambient temperature and fluid temperature for electric ball valves;
4. Determine the usage method and frequency of use;
5. Opening and closing speed and time;
6. Valve stem diameter and rotation direction;
7. Connection method;
8. According to the power source parameters: electric power supply pressure, phase number, and pneumatic air source pressure;
9. Special considerations: low temperature, explosion-proof, waterproof, fireproof, etc.
10. Check the installation space on site
11. On site gas source pressure, etc.