It is a parallel connection system and this system USES the high-speed valve as a pilotvalve to control the twin throttle which controls the pressure and the flux of the hydraulic control system.
When the coil power, the pilotvalve by the spring return, pilot hole closed throttlevalve chamber pressurized by the piston return spring and thrust, the electromagnetic valve is closed.
当线圈断电时，先导阀芯靠弹簧复位，先导孔关闭，阀腔由活塞节流孔增压和复位弹簧的推力，电磁阀关闭。
3
When the coil power, the pilotvalve by the spring return, pilot hole closed, the valve chamber and pressurized by the piston return spring throttle thrust, the electromagnetic valve is closed.