hi abdul,

there are basically three type of flows to consider,

- displacement flow = cylinder velocity times cylinder area

- compression flow = ammount of oil to raise pressure to force/cyl area required. the attached volume plays a crucial part here

- leackage flow = volumetric losses of drive train under pressure

sum of the above gives you the total required flow.

you can compute by hand or use a hydraulic simulator tool. bosch rexroth offeres one for free. check it out at www.boschrexroth.com/simster

good luck

m. liedhegener

bosch rexroth ag