This series of electric actuators features comprehensive functionality, reliable performance, advanced control systems, compact size, lightweight design, and ease of operation and maintenance. They enable remote, centralized, and automatic control of valves and are widely used in industries such as power generation, metallurgy, petroleum, chemical, papermaking, and wastewater treatment. Multi-turn electric actuators are categorized by protection type: standard, outdoor, and explosion-proof; by control method: conventional, integrated, and smart integrated; and by connection type: torque type, power station type, and thrust type. The integral switch type is equipped with a remote control module, supporting inching or continuous operation remotely, and outputs a 4-20mA current feedback signal. It does not require a matching electric control box/cabinet for centralized control. On-site button control is available, while remote centralized control via DCS or PLC is also supported, with corresponding 4-20mA feedback signals output. Continuous operation via on-site buttons, remote control, centralized control, and automatic control are all possible. The device includes phase sequence identification and phase-loss protection functions.