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A filter diamond with a check valve alongside it.
Also known as: Bypass filter symbol, Filter relief symbol
In ISO 1219 fluid power diagrams a filter drawn alongside a check valve denotes a filter with a bypass, which opens to pass unfiltered fluid rather than starve the circuit when the element clogs.
Denotes a filter with a bypass path that opens when the element becomes restricted.
Contexts: Technical drawing
Accepts unfiltered fluid in preference to starving the circuit, which is a deliberate design trade rather than a fault condition.
Contexts: Technical drawing
A filter diamond, a square standing on one corner, with a check valve triangle drawn in a parallel line beside it.