Pressure regulator

A pressure regulator (1) for a fuel injection system of an internal combustion engine, in which a pressure difference prevailing between a pressure inlet (8) and a pressure outlet (4) can be kept essentially constant by opening and closing at least one valve (20), which valve includes a valve closing member (18) forced into the closing position against a valve seat (12) by the action of a valve closing spring (16), the improvement wherein the valve spring is formed by means of at least one pivotably supported valve leaf spring (16), and a first arm (22) of the valve leaf spring (16), oriented toward the valve seat in terms of the pivotable bearing means (26), is braced on the valve closing member (18), and a second arm (24) of the valve leaf spring (16) located on the side opposite the valve seat (12) is braced on a support body (30;

• 68), in such a way that a torque equilibrium prevails at the valve leaf spring (16).