Pilot-operated double-electrically controlled two-position four-way electromagnetic reversing valve
When the pilot valve D2 is energized, Dl When the power is off, the moving iron core 6 is sucked up, and the compressed air in the c cavity is discharged through the T1 port. At this time, the compressed air from P to A acts on the large and small pistons. Due to the area difference between the large and small pistons, an upward force is generated, causing the piston assembly 2 to move upward. At the same time, the sealing plug 4 also moves upward and opens the valve port 3, so that the compressed air at the upper end of the piston assembly 2 is discharged through the hole 6. After the piston assembly 2 moves upward, P and B are connected, and A and T are connected (exhaust). At this time, even if D2 is powered off, the upward force due to the area difference between the large and small piston still exists, so the output state will not change, that is, it has a memory function. Pneumatic solenoid directional valves are the same as hydraulic solenoid directional valves. There are many types, and their working principles are also similar, so I won’t go into details.
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