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The difference between electric valves and electric actuators: 1. Different driving energy sources 2. Different cut-off mechanisms
Electric valve, English name: motor driven valve or electric valve. Simply put, an electric valve is a valve controlled by an electric actuator to open and close the valve. It can be divided into two parts, the upper part is the electric actuator and the lower part is the valve. It can also be called an air conditioning valve.
Electric valve is a high-end product in automatic control valves. It can not only achieve switching function, but also adjust the valve position of the regulating electric valve. The stroke of electric actuators can be divided into two types: 90 ° angular stroke and linear stroke, and special requirements can also meet the full stroke of 180 °, 270 °, and 360 °. By using an electric actuator with angular travel and a valve with angular travel, the valve can be rotated within 90 degrees to control the flow of fluid in the pipeline; A straight stroke electric actuator is used in conjunction with a straight stroke valve to control the flow of fluid in the pipeline through the up and down movement of the valve plate.
There are two types of electric valves, one is the angular stroke electric valve: it is used by an angular stroke electric actuator in conjunction with an angular stroke valve to achieve control of pipeline fluid flow within 90 degrees of valve rotation; Another type is the straight stroke electric valve: it is used in conjunction with a straight stroke valve by a straight stroke electric actuator to control the fluid flow in the pipeline through the up and down movement of the valve plate. Usually used in conjunction with highly automated equipment.
Principle: Electric valves are usually connected by electric actuators and valves, and after installation and commissioning, they become electric valves. Electric valves use electrical energy as power to connect the electric actuator and drive the valve, achieving the opening and adjusting actions of the valve. Thus achieving the purpose of switching or adjusting the pipeline medium. Electromagnetic valve is a type of electric valve; It uses the magnetic field generated by the electromagnetic coil to pull the valve core, thereby changing the on/off of the valve body. When the coil is powered off, the valve core retracts by the pressure of the spring.
electric actuator
The broad definition of an actuator is a driving device that can provide linear or rotational motion, utilizing a certain driving energy source and working under the action of a certain control signal. The actuator uses liquid, gas, electricity, or other energy sources and converts them into driving force through motors, cylinders, or other devices. There are three basic types of driving modes: Part Turn, Multi Turn, and Linear.
The basic actuator is used to drive the valve to the fully open or fully closed position. The actuator used to control the valve can accurately move the valve to any position. Although most actuators are used for opening and closing valves, the design of today's actuators goes far beyond simple switching functions. They include position sensing devices, torque sensing devices, electrode protection devices, logic control devices, digital communication modules, and PID control modules, all of which are installed in a compact housing.
As more and more factories adopt automation control, manual operations are replaced by mechanical or automated equipment. People demand that the actuator can play an interface role between the control system and the mechanical movement of the valve, and also require the actuator to enhance work safety performance and environmental protection performance. In some hazardous situations, automated actuator devices can reduce personnel injuries. Some special valves require emergency opening or closing in special circumstances, and the valve actuator can prevent further spread of danger while minimizing factory losses. For some high-pressure large-diameter valves, the required output torque of the actuator is very large. In this case, the required actuator must improve mechanical efficiency and use a high output motor to operate the large-diameter valve smoothly. For some small torque valves, compact electric valves are also used, which have the advantages of light weight, compact structure, and complete functions compared to ordinary ones.