Hydraulic cylinder control circuit

This example shows the low-voltage electrical control side of a double-acting hydraulic cylinder. A fused 24 V supply feeds two momentary commands. The extend pushbutton energizes one relay coil and its directional-valve solenoid; the retract pushbutton energizes the other pair. The labels make it clear which command shifts which side of the 4/3 valve. This is useful when documenting a basic press, clamp, lift, or fixture before adding limit switches, interlocks, or automatic sequencing. The drawing does not replace the hydraulic schematic: the pump, reservoir, relief valve, hoses, and cylinder ports still need to be specified in the machine documentation.