Most of modern production control systems choose electric valve actuator. Compared with traditional valve actuator, electric valve actuator is safer, having simpler structure and longer services. Electric valve can be divided into two parts: the upper part is electric actuator and the lower part is the main body of valve.
Electric valve actuator has wide application and high adaptation. Nevertheless, electric valve actuator is welcomed by users and it is used as control device for intelligent valve.
During application of
electric valve actuator, users should pass through three periods rationally. The first period is run-in period. The obstacles are mainly caused by model selection, design, installation and environment. For example, if the torque is too small, it may directly regulating speed of electric valve actuator. If power lines are mixed together with signal lines, large signal interference is caused, having influence on stable operation of motor. Those problems must be found out and treated timely, in case of unnecessary losses. When electric valve actuator enters into mid-term of operation, the overall performance of control mechanism has already entered into adaptation period, operating steadily. Individual small obstacle may appear. For this, users just only need to carry out appropriate maintenance. When electric valve actuator enters into later period of operation, most of components are ageing, especially every drive disk assembly is worn seriously, causing operational stability of operation to decrease, or positional accuracy of intelligent locator module to fall. For this, users should find out reasons and figure out problems through repairing or changing parts.
Electric valve actuator has already become main stream products on machinery market. Electric valve actuator is the most indispensable part for automatic valve. It can reduce energy consumption effectively during operation. The advantage of electric valve actuator is that improves operation efficiency and saves energy efficiently. Categories of motor are various. There are different properties of electric head such as quarter-turn electric head on the market.
Electric valve actuator has its own advantages. The access of energy is quite convenient. Just only plugged into socket, the actuator can operate. The signal is transmitted quickly and far. During long distance transmission, the control cannot be influenced. And it still has higher accuracy during control. The signal will not be out of control due to long distance. Wiring is also easy without troubles during installation. When obstacle occurs, it can be found out fastly. Faulted lines can be quickly taken place of by using new lines. The repair is easy without large amounts of repairing costs.
More and more plants adopt automation control. Manual operation is taken place of by mechanical or automatic equipment. Actuator is required to play as interface interaction between control system and mechanical motion of valves and it also intensifies safety performance for working and protection performance for environment. In some dangerous occasions, automatic actuator can reduce damage to personnel. Some particular valves are required to be opened or closed urgently under special situations. The valve actuator can prevent danger from being spread further and reduce loss to minimum meanwhile. For valves having high pressure and large dimension, the actuator should very large torque. The needed actuator must improve mechanical efficiency and use high output motor so that it can steadily operate large dimension valves. For valves having small torque, small actuator comes out. Compared with common actuator, small actuator has advantages including light weight, compact structure and complete functions.
Valves equipped with electric valve actuator include
plug valve,
ball valve and
butterfly valve.
