Hydraulic cylinders differential flow

Maybe then leakage flow over the plunger between the opposite cylinders?

The retracting speed is typically faster than the extending speed, because there is less fluid volume on the rod side of the piston.

I came across this term at this website, as per link below

http://www.hydraproducts.co.uk/hydraulic-calculators/known-cylinder.aspx

GA from me.

Sometimes this is also referred to as regenerative flow.

Given the right ratio of rod diameter to bore diameter it can be used to give equal speed in either direction, I have used this on reciprocating mechanisms.

Hi

The most common hydraulic cylinder has only a single rod at one end. This means the areas and therefore the volumes of fluid at either end are different. Thus each end will, for a given pressure exert a different force and for a given volume will travel at a different speed. The usual terms are Full area i.e the rod-less end and annular area the rod end. The areas are obtained by normal arithmetic and take the rod area from the full area to obtain the annular area. One aspect that is often overlooked in sizing pipework and filters is the amplification of flow you get when pushing fluid into the rod end. Typically the area ratios might be 2 to 1 and therefore you will get twice the flow out of the full area end when feeding fluid into the rod. Likewise if metering out on the rod end you will have only half the flow rate to work with.

Regards

Oliver Dunthorne