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Hydraulic Symbols – Pipes & Connections

Connected lines

Lines with no relationship (disconnected)

Flexible hose (used for connecting moving parts)

Quick release coupling without mechanically opening check valve (connected and uncoupled)

Quick release coupling, automatically sealing, with a mechanically opening check valve (connected and uncoupled)

One-way connection (rotary feedthrough)

Continuous breather

Temporary breather

Closed breather

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