Copying valves are only rarely used now; they have been supplanted by various forms of NC control.
![e1edd3af11689aca5233b56502bbeb10af1bdb95 0001_kopierventil.gif](/fileadmin/smc/files/e1edd3af11689aca5233b56502bbeb10af1bdb95.gif)
Figure K 32: copying valve
Hydro-mechanical continuously adjustable valve which mechanically samples the contours of a template (containing information regarding the shape of a workpiece) and converts these into a distance, proportional to deflection, for the following hydraulic cylinder () (Figure K 32).