Good work card QDA-250 type screw hoist hoist ductile force 25T is a? Kind of comprehensive multi-functional hoist, widely used in water conservancy and hydropower projects, river training works, all kinds of water supply and drainage and urban sewage Governance project gate, weir gate, promoted valve, mud valve lift adjustment and maintenance. Second, the constitution QDA Hoist: ??? good work card QDA-250 type screw hoist hoist ductile force 25T structure consists of housing, cover, bracket, nuts, screws, pressure bearing, screw, worm, the worm hand cranks, electrical, electronics and other components. Flashlight dual hoist using worm and worm gear nut rotates, the screw up and down motion, high safety performance, flashlight dual hoist with a travel limit torque protection and double protection measures;? Easy to operate, enabling remote control and field operations , a single centralized control and more control in the form of control; flashlight with two hoist has opening instructions, accurate and reliable, opening and closing the light signal indication;? can first use an ordinary type, outdoor type, explosion-proof and other forms QDA electric hoist is widely used in various types of drainage works and water conservancy, hydropower projects, mainly used to control all types of gate, weir gate, lift valves, enabling the gate or valve opening and closing. Generally divided into two kinds of manual and electric control, or when a large gate valve when the aspect ratio, the main technical parameters model requires the use of twin-lift hoist QDA type screw hoist of ductile iron? Parameter operating torque (Kgf / m) Hoisting force (T) Motor Power (KW) screw diameter (mm) AB QDA-20 20 2 0.37 32 478-513 346 QDA-45 45 4.5 0.75 44 882-598 293 QDA-60 60 6 1.1 44 882-895 293 QDA-90 90 9 1.5 55 882-960 323 QDA-120 120 12 2.2 55 882-960 323 QDA-180 180 18 3 60 946-1011 371 QDA-250 250 25 4 80 946-1011 371 QAD ( Advantages S) flashlight dual hoist: 1, high safety performance, with torque protection and travel limit dual protection measures; 2, easy to operate, enabling remote control and field operations, a variety of control a single control and centralized control form; 3, opening instructions, accurate and reliable, opening and closing the light signal indication; 4, to use ordinary type, outdoor type, explosion-proof and other forms, can be adapted to the various needs of different environments.