For John Deere 310J 843K 310K hydraulic solenoid valve 580037013 12V

   Direct-acting solenoid valve: Principle: When energized, the electromagnetic force generated

by the electromagnetic coil lifts the closing part from the seat, and the valve opens; When the

power is off, the electromagnetic force disappears, the spring presses the closing part on the

seat, and the valve is closed. Features: It can work normally under vacuum, negative pressure

and zero pressure, but the diameter is generally not more than 25mm. Distributed direct acting

solenoid valve: Principle: It is a combination of direct acting and pilot principle, when there is no

pressure difference between the inlet and the outlet, after the power is turned on, the electromagnetic

force directly lifts the pilot small valve and the main valve closing part in turn, and the valve opens.

When the inlet and outlet reach the starting pressure difference, after power, the electromagnetic

force pilot small valve, the main valve lower chamber pressure rises, the upper chamber pressure

drops, so as to use the pressure difference to push the main valve upward; When the power is off,

the pilot valve uses spring force or medium pressure to push the closing part and moves downward

to close the valve. Features: It can also be operated at zero pressure difference or vacuum and high

pressure, but the power is large, and it must be installed horizontally.