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Resistive Heating (Heat Generation)
Current flows through hundreds of turns
of wire to induce the necessary magnetic field when a
solenoid valve actuates. Because the wire has resistance,
heat generates as current flows through it. This resistive
heat subsequently dissipates through conduction to the
exterior surface of the valve and through convection to
the surroundings. When the rates of heat generation and
dissipation equalize, the valve achieves a steady-state
temperature, which must be less than 190 °F (88 °C)
to maintain integrity of the coil.
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