The ETS 6 Electric expansion valves open and close to regulate refrigerant flow by means of a screw, whose rotating motion is transformed
into linear motion. This occurs by the rotation
of a magnet-needle valve assembly which
moves when electrical signals are applied to the
surrounding coil.
Within the coil structure, there are different
winding configurations, and the
polarities are changed by the electrical signals
applied. By application of the appropriate
combination of signals, in the form of pulses,
the coil forces the rotor of the valve to move in a
stepwise fashion.
Application of multiple pulses will make the valve
mechanism to move through a series of steps
in the chosen direction, in order to set the valve
with the required opening degree.
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