differences between systems

[TECNOMODEL]

I'm just praying that the oleodynamics know her very little.

I would need clarification on the operation of two systems which, practically, carry out the same work but in a different way.
It is a system that adjusts the working pressure on a variable displacement pump.

the first system has this scheme:il secondo system ha questo:Does anyone want to try to explain the differences between the two?

 

[meccanicamg]

you should try to consult the duplomatic catalog that on variable displacement pumps explains quite well the various adjustments.

 

[TECNOMODEL]

you should try to consult the duplomatic catalog that on variable displacement pumps explains quite well the various adjustments.

I've been looking at it since last night but something that can make me understand the difference between the two systems I can't find.
I find only the catalogs of the various models with the specifications and some indications on the operation but very "basic".
would you have a link with more precise material?
thanks and good day

 

[Kaji]

I am sorry, but on such particular distributors, especially the second, it is difficult to find online treatises that can clarify things, usually in distributors are rappresenced the configurations that occur when moving the drawer, but here does not seem so.
the second I can say that from the double lines on the long sides seems proportional, while in the first there is no symbol that makes the same think.
If you want you can analyze small pieces for small pieces, but I don't know how worth it