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6.3: Solenoid Operated Valves

  • Page ID
    3668
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    A YouTube element has been excluded from this version of the text. You can view it online here: https://openoregon.pressbooks.pub/hydraulics/?p=177

    Describe a solenoid operated valve and identify its purpose in an electrically controlled system

     

    Describe the similarities and differences between a solenoid operated valve and a contactor

     

    Differentiate between the terms NO and NC as applied to electrical switches and valves

    Draw the hydraulic schematic symbol for a spring offset, 2 position, four way, solenoid operated valve with a cross connect in the deactivated state and a straight through in the activated state

     

    Draw the electrical schematic symbol for the coil of a solenoid operated valve

     

    Describe a solenoid and discuss its function and purpose inside a solenoid operated valve

     

    Describe the purpose of the drain port inside a solenoid operated hydraulic valve

     

    Describe the purpose of a manual override for a solenoid operated valve and draw its schematic symbol

     

    Differentiate between the applications of closed, tandem, float, and open center 3 position valves

     

    Describe the problems associated with the simultaneous activation of both solenoids for a double solenoid valve and discuss the means of preventing this from occurring

     

    Differentiate between electrically held and detented solenoid operated valves

     

    Describe the components of a typical solenoid operated valve and identify their purpose

     

    Define and differentiate between rated voltage, pickup voltage, hold in voltage, and dropout voltage

     

    Describe why a 120V AC coil cannot be used with 24V DC

     

    Differentiate between inrush and sealed in current

     

    Describe why a means of voltage spike suppression must be used for certain coils

     

    Discuss points of inspection and maintenance procedures for solenoid operated valves

     

    Describe shift limit characteristics for solenoid operated valves

     

    Define both “rated flow” and “maximum inlet pressure” for solenoid operated valves

     

    Describe both the “pressure drop for different flow rates” and “operating limits” performance curve for solenoid operated valves

     

    Describe leakage, fluid compatibility, and required filtration specifications for solenoid operated valves

     

    Describe a variable solenoid operated valve and discuss its application for a hydraulic system

     

    Describe a piggyback valve and discuss its application for a hydraulic system