Jiangsu Lan gate valve produced as a closing action of the valve, which is mainly made up of body, closing member and valve cover three parts. Seat in the body Railway Electrification Bureau Group Co., stem drive valve opening and closing parts (disc) do lifting movement, valves and valve seat of the clutch, the valve opening and closing. The valve opening and closing mechanism (also known as the valve disc, valve), the valve stem and the drive device (handwheel) components. Stem trapezoidal screwing the valve cover, handwheel and valve fixed in the upper and lower ends of the stem, handwheel stem may rise or fall, to drive valve toward or away from the valve seat to close and open, close the valve and valve seat mating electrical engineering and automation, relying on pressure to the valve stem is pressed against the seat, when the valve is in a fully closed state, the valve does not leak tight. One type 江苏兰 valve actuator electric rotary actuator power-driven rotary actuator is the most common and reliable. Single-phase or three-phase motor drive or worm gear final drive stem nut, stem nut produce movement of the valve stem to open or close the valve. Multi-turn electric actuators can quickly drive large valves. In order to protect the valve from damage, installed at the end of valve travel limit switch will cut off electrical power, but when the safety torque is exceeded, the torque sensing device will be cut off electrical power, used to indicate the valve position switch switching state Installation clutch device can be manually operated hand wheel valve during a power failure. The main advantage of this type of actuator is that all components are mounted within a housing, in this waterproof, dust-proof enclosure integrates all the basic and advanced features. The main disadvantage is electric, when the power failure, the valve can remain in place, only the use of standby power systems, the valve can achieve fail-safe position (fail open or fail closed) 江苏兰 valve (FIG), electrical engineering and automation, By 江苏兰 valve General Electric Equipment Co., Ltd..江苏兰 valve General Equipment Co., Ltd. (www.lanfa.cn) strong, credible, in Changzhou, Jiangsu regulating valve industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Jiangsu Lan valve into the brilliant and you work for a better future!