SOLENOID VALVE CONSTRUCTION/OPERATION

BHE051321101A02

• The construction of all solenoids is the same, but the polarity of the positive and negative terminals is different.


1	Output port (solenoid pressure)
2	Drain port
3	Supply port (pilot pressure)
4	Normal low

Normal High

• De-energized (OFF) or duty 0%

– Because the output port (solenoid pressure) and the supply port (pilot pressure) connect in the solenoid, the solenoid pressure is supplied to the output port.

• Energized (ON) or duty 100%

– Because the output port (solenoid pressure) and the drain port connect, solenoid pressure is drained.


1	De-energized (off)
2	Energized (on)
3	Output port (solenoid pressure)
4	Supply port (pilot pressure)
5	Drain port

Normal Low

• De-energized (OFF) or duty 0%

– Because the output port (solenoid pressure) and the drain port connect in the solenoid, the solenoid pressure is drained.

• Energized (ON) or duty 100%

– Because the output port (solenoid pressure) and the supply port (pilot pressure) connect in the solenoid, the solenoid pressure is supplied to the output port.


1	De-energized (off)
2	Energized (on)
3	Output port (solenoid pressure)
4	Drain port
5	Supply port (pilot pressure)