Flashlight dual hoist QDA-120 / QDA-90: QDA hoist is widely used in various types of drainage works and water conservancy and hydropower projects, mainly used to control various types of gates, weir gates, valves lift, thus achieve gate or valve is opened and closed. Generally divided into two kinds of manual and electric control, when a large aspect ratio of the value of the gate or valve, the need to produce with twin-lift hoist. QDA / S flashlight dual hoist specific models are: Ⅰ: Single Drop QDA-20, QDA-45, QDA-60, QDA-90, QDA-120, QDA-180, QDA-250 Ⅱ: double hanging QDS-2 × 3, QDS-2 × 5, QDS-2 × 8, QDS-2 × 10, QDS-2 × 12, QDS-2 × 15, QDS-20, QDS-2 × 25, QDS-45, QDS-90, QDS-180, QDS-250.QDA hoist uses: Applications and water conservancy and hydropower, thermal power plants, power plants, municipal, landscape and environmental protection, sewage treatment plants, petroleum, chemical, metallurgy, printing and dyeing, paper making factories into exit gates, grilles and screens on and off. Can be used for the next shot gates can also be used in the dark bar gate. QDA hoist features and functions: full-featured, reliable performance, advanced control systems, small size, light weight, easy to use and maintain. Has overload shutdown protection, accident alarm display, upper and lower stroke limit control features. Having a hand, an electric switch mechanism, it is automatically power off. Integrated switching regulator type can be realized and integration site and remote control functions. Outdoor type, explosion-proof protection class: IP55 (special order IP65, IP67) instantaneous torque protection: When turned on or off to the moment when the moment was the top open, the gate will not stop the action, even after instant torque switch to open the top closed, the gate remains Council action, only to reverse the action a bit, can be lifted over torque protection. Lack of protection: a power phase and output phase protection.