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Solid, dashed and dot-dashed lines for working, pilot and drain.
Also known as: Pilot line, Drain line marking
In a fluid-power diagram a solid line is a working line, a long-dashed line is a pilot line carrying control pressure, and a dot-dashed line encloses a manifold or assembly. Confusing a pilot line with a working line makes the circuit unreadable.
Distinguish working lines, pilot control lines, drain lines and enclosure boundaries by line pattern.
Contexts: Technical drawing
Carry the circuit's logic in the pilot lines, which show what each valve is responding to rather than where the power flows.
Contexts: Technical drawing
Straight lines drawn variously unbroken, in long dashes, in short dashes, or as dashes alternating with dots.