To allow correct operation of the hydraulic block and in particular obtain a sufficient synchronisation time (filling of chambers), it is necessary to have a constant flow, whatever the variations in pressure and temperature.

A flow regulator placed above the hydraulic block provides this constant flow. The fluid under high pressure passes through discs forming baffles, providing a jet.

This jet placed in a piston creates a pressure loss according to the flow, therefore high pressure enters.

The pressure loss positions the piston (resting against a loaded spring) which blocks, more or less, the opening of the output thus regulating the flow.