Through this article, you will learn how to choose a suitable valve actuator, and we hope that the introduction in this article can be helpful for your future use.
Execution mechanism of Shangyi Eleventh FactoryIt can be used in conjunction with Type III instruments, as well as assembled instruments and TA instruments. It is powered by a power source and receives a unified standard signal of DC 4-20mA, which can be converted into angular displacement corresponding to the input signal and used in the control system of industrial sectors such as power plants, steel plants, OEM, and light industry.
When choosing the actuator of Shangyi Eleventh Factory, we should consider various factors comprehensively, including driving energy, valve type, torque size, and actuator selection. Among them:
1. Valve type: When selecting an actuator for a valve, it is necessary to know the type of valve in order to choose the correct actuator type. Some valves require multi turn drive, some require single turn drive, and some require reciprocating drive, which affect the selection of actuator types.
2. Driving energy: The most commonly used driving energy sources are power sources or fluid sources. If a power source is chosen as the driving energy source, a three-phase power source is generally used for large-sized valves, while a single-phase power source can be used for small-sized valves. Generally, electric actuators can have multiple types of power sources to choose from. Sometimes DC power supply is also optional, and in this case, power failure safe operation can be achieved by installing batteries. There are many types of fluid sources. Firstly, they can be different media such as compressed air, nitrogen, natural gas, hydraulic fluids, etc. Secondly, they can have various pressures. Thirdly, the actuator has various sizes to provide output force and torque.
3. Torque magnitude: For valves with a 90 degree rotation, such as ball valves, disc valves, and plug valves, the corresponding valve torque magnitude is obtained through valve manufacturers. Most valve manufacturers test the operating torque required by the valve at rated pressure and provide this torque to customers. For multi turn valves, the situation is different. These valves can be divided into: reciprocating (lift) motion - valve stem non rotation, reciprocating motion - valve stem rotation, non reciprocating - valve stem rotation. The diameter of the valve stem must be measured, and the size of the valve stem connection thread determines the actuator specification.
4. Selection of actuator: Once the type of actuator and the required driving torque for the valve are determined, the actuator manufacturer's data sheet or selection software can be used for selection. Sometimes the speed and frequency of valve operation also need to be considered. The fluid driven actuator can adjust the stroke speed, but the electric actuator with three-phase power supply only has a fixed stroke time.
The above is the editor's opinion onExecution mechanism of Shangyi Eleventh FactoryThe relevant introduction of selection, of course, choosing a suitable actuator is not just about the above four points. If you want to learn more, please continue to follow us!