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A valve centre with pump joined to tank and ports blocked.
Also known as: Tandem centre condition, Pump to tank centre
In ISO 1219 fluid power diagrams a tandem centre joins the pump port to the tank port while blocking both actuator ports, unloading the pump while still holding the cylinder.
Joins pump to tank while blocking the actuator ports, unloading the pump and holding the load at once.
Contexts: Technical drawing
Takes the useful half of each of the open and closed centres, which is why it is among the most commonly specified centre conditions.
Contexts: Technical drawing
The centre square of a directional valve with a stroke joining the pump and tank ports and two blocked strokes at the actuator ports.