| One of the advantages of using machines to control | | | | chance that a spark can be generated to cause a |
| processes | | | | fire. However |
| for you is that you can harness tremendous | | | | using air for actuating may be more expensive to |
| amounts of power | | | | install and |
| and energy which humans do not possess.By a flick | | | | to maintain.Using electrical motors to drive gearing |
| of a switch, huge sliding flood gates can move to | | | | may be an excellent |
| allow large quantities of water to flow out of a dam. | | | | choice when cost is a consideration. Electrical wires |
| With | | | | can be |
| just a slight twist on a handle, supertankers weighing | | | | laid more easily and electrical systems are relatively |
| | | | clean.Use of hydraulics may be excellent where |
| hundreds of thousands of tons are able to turn | | | | power and simplicity |
| because of the | | | | is important.Most of the actuators operate in a linear |
| corresponding rotation of huge rudders.Similarly, | | | | (straight line) |
| processes operating valves can be remotely | | | | manner. Hydraulic rams, and pneumatic diaphragms |
| operated | | | | work in this |
| to control flow, temperatures, pressures and so | | | | manner. There are also some that are constructed |
| on.All these final control elements - flood gates, | | | | to operate |
| rudder, | | | | in a rotary manner.Electrical motors normally operate |
| valves - must be operated by actuators. The | | | | in a rotary manner. However |
| function of the | | | | if a linear motion is needed, this can be obtained by |
| actuator is to move to control elements in the | | | | means |
| processes.In order to move the actuator, there must | | | | of spur gears, rack and pinion arrangements, crank |
| be a medium for | | | | and other |
| transmitting the required power or action. All the | | | | means.Actuators can provide the power to move |
| actuators | | | | final control elements, |
| are mechanical in nature. The common means of | | | | but do they know when to stop?A good control |
| transmitting the | | | | system will provide the sensing and feedback |
| power are: pneumatic (air), hydraulic (fluid), and | | | | loop to tell the actuator when to stop its |
| electrical | | | | actions.Well folks, be in control!"Tap the Traditional |
| (motors).The actuators must be designed to work | | | | Effective Information Source!" Magazines |
| for that medium. There | | | | contain more information for you. Use them to as |
| are several advantages and disadvantages for | | | | your tools! |
| choosing a | | | | "Obtain QUALITY INFORMATION through these |
| particular medium. For example, pneumatic actuators | | | | time-tested media!"Many years of working |
| are | | | | experience in Marine, Facilities, |
| particularly useful when the atmosphere contains | | | | Construction has given the author material for |
| flammable | | | | writing e-books |
| gases. By using pneumatic actuators, there is very | | | | and articles related to engineering, and management. |
| little | | | | |