solenoid valve 1. A combination of an electromagnet plunger and an orifice to which a disc or plug can be positioned to either restrict or completely shut off a flow. (Orifice closure or restriction occurs when the electromagnet actuates a magnet plunger.) 2. A combination of two basic functional units: (a) a solenoid (electromagnet) with its plunger (or core), and (b) a valve containing an orifice in which a disc or plug is positioned to stop or allow flow. The valve is opened or closed by movement of the magnetic plunger (or core), which is drawn into the solenoid when the coil is energized.
solid A state of matter in which the motion of the molecules is restricted. They tend to remain in one position, giving rise to a crystal structure. ...
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