Unit 15 Solenoid Valves Objectives

Unit 15 Solenoid Valves Objectives

Unit 15 Solenoid Valves Objectives

unit 15 solenoid valves objectives

unit 15 solenoid valves objectives

Unit 15 Solenoid Valves Objectives After studying this unit , the student should be able to • Describe the purpose and operation of two-way solenoid valves . • Describe the purpose and operation of four-way solenoid valves . • Connect and troubleshoot solenoid valves . • Read and draw wiring symbols for solenoid valves . Valves are mechanical devices designed to control the flow of fluids such as oil , water , air , and other gases . Many valves are manually operated , but electrically operated valves are most often used in industry because they can be placed close to the devices they operate , thus minimizing the amount of piping required . Remote control is accomplished by running a single pair of control wires between the valve and a control device such as a manually operated switch or an automatic device . A solenoid valve is a combination of two basic units: an assembly of the solenoid (the electromagnet) and plunger (the core) , and a valve containing an opening in which a disc or plug is positioned to regulate the flow . The valve is opened or closed by the movement of the magnetic plunger . When the coil is energized , the plunger (core) is drawn into the solenoid (electromagnet) . The valve operates when current is applied to the solenoid . The valve returns automatically to its original position when the current ceases . Most control pilot devices operate a singlepole switch , contact , or solenoid coil . The wiring diagrams of these devices are not difficult to understand , and the actual devices can be connected easily into systems . It is recommended that the electrician know the purpose of and understand the action of the total industrial system for which various electrical control elements are to be used . In this way , the electrician will find it easier to design or assist in designing the electrical control system . It will also be easier for the electrician to install and maintain the control system .

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