Event: Coil Car Table Cylinder - Lifting (Extend)

For previous steps in this sequence see the event “HPU – On.”

 

1)    Proportional Directional Control Valve 334.13 is energized to the parallel flow pattern.

2)    Simultaneously, Directional Control Valve 387 is energized, venting the spring chamber of DIN Cartridge Insert Valve 360 allowing the DIN valve to open allowing flow through the DIN valve in either direction.

3)    Pressurized hydraulic fluid flows through the proportional directional control valve passing from P to A, through the DIN valve from nose to side, then into the cap end of Coil Car Table Cylinder 801 causing the cylinder to extend.

4)    Exhaust fluid from the rod end of the cylinder flows through the proportional directional control valve passing from B to T. Finally, the exhaust fluid flows back to tank through Duplex Return Line Filter 045.03.

5)    The cylinder travel speed as well as the starting and stopping velocity ramps are controlled by inputs to the electronic control card for the proportional directional control valve. Pressure Relief Valve 285.13 protects the cylinder from overpressure caused by overloading. This relief valve protects the cylinder even when the DIN valve assembly is closed (de-energized).