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A2677 Rev 1.5
X20 Sprayer Reference Manual
Different Valve Types
There are three different valve types, which are:
• 2-Wire Valve—this refers to an electric section, dump or
Regulator Valve
The valve is driven by an electric motor that is able to rotate
in both directions. Two wires are connected to this type of
valve from the controller. To rotate the motor 12V is applied
to one of the wires whilst GND is applied to the other. When
opposite voltage is applied to the two wires the motor will
rotate in the opposite direction.
Common terms for this system are Reverse Polarity or
Bi-Directional.
• 3-Wire Valve—this refers to an electric section, dump or
Regulator Valve
The valve is driven by an electric motor that is able to
rotate in both directions. Unlike the 2-wire valve, the 3-wire
valve has in built changeover relays that change the motor
direction, depending on whether 12V or 0V is applied to the
signal wire.
Contsant 12V and GND are required in addition to the signal
wire.
• Solenoid Valve—this refers to electromagnetic coil type
valves.
Solenoid Valves usually consist of a coil, that when exposed
to voltage produces a magnetic field. The magnetic field
draws a needle against a spring away from its seat, to allow
liquid to flow.