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A small tee shape marking hand-button operation.
Also known as: Button actuator symbol, Push button valve mark
In ISO 1219 fluid power diagrams a small tee shape drawn against a valve denotes actuation by a push button pressed by hand.
Denotes actuation by a hand-operated push button.
Contexts: Technical drawing
Is distinguished from the plunger mark, which is pressed by a machine element rather than by an operator.
Contexts: Technical drawing
A short stroke ending in a perpendicular bar, drawn against the end of the valve block in the shape of a letter T.