 |
| A) Open Center Used when cylinder "drift" is necessary under pressure (i.e. snow plow blade) B) Closed Center Used when cylinder must lock into place along travel path and fluid flow from supply is blocked completely (i.e. air-powered press) C) Tandem Center Same as "B" but allows fluid to flow through valve, reducing created fluid heat and facilitating more functions downstream (i.e. multiple valves in series) D) Float Center In the center position the cylinder can move freewheeling in or out under no pressure (i.e. free-wheeling hydraulic motor) |
