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Filter, regulator and lubricator grouped in one outline.
Also known as: FRL unit symbol, Air preparation unit, Filter regulator lubricator
In ISO 1219 fluid power diagrams an air service unit is a filter, pressure regulator and lubricator drawn together inside a dash-dot enclosure, the standard air preparation set.
Denotes the combined filter, regulator and lubricator supplied as one assembly at the inlet of a pneumatic circuit.
Contexts: Technical drawing
Uses the enclosure line to show that three functions arrive as one purchased unit, which is that convention's most common application.
Contexts: Technical drawing
A filter diamond, a regulator square and a lubricator symbol drawn in a row inside a dash-dot outline.