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A valve centre with actuator ports joined to tank.
Also known as: Float centre condition, Motor centre condition
In ISO 1219 fluid power diagrams a float centre joins both actuator ports to tank while blocking the pump, letting the actuator move freely under external force.
Joins both actuator ports to tank at rest, allowing the actuator to be moved by an external force.
Contexts: Technical drawing
Lets a hydraulic motor coast to a stop rather than braking abruptly, which is why it is also called a motor centre.
Contexts: Technical drawing
The centre square of a directional valve with strokes joining both actuator ports to the tank port and a blocked stroke at the pump port.