Hello Mr Shabbir,

If I have understood your question right and read your explanation it could be that you mixed up some things.

In my understanding its

Hydraulic cylinder :

p(hyd)= F/ A(cylinder)  with the area of your cylinderpiston

Surface Force Stamp:  

Sigma(surf.press)= F/ A(pressing area)  -> F = sigma * A(pressing area)

Thus:

p(hyd)= sigma(surf.press) * A(pressing area) / A(cylinder)

A(pressing area) / A(cylinder) = K (constant)

Thus:

p(hyd)= sigma(surf.press) * K

Now you can translate your p(hyd) from you gauge into a Surface pressure which exists at your stamp.

regards,

Kamil Wlotzka