Patent ID: 7104276

Claim:
High-pressure valve for a high-pressure pump, with a valve body having an inlet and outlet, the said valve being connected to the cylinder chamber of a pump piston rod, the inlet being connected to the said cylinder chamber via a bore accommodating a first valve seat and its ball and the said chamber communicating with the outlet via another bore that is also equipped with a valve seat and its ball, the said valve seats and the balls constituting an assembly as ball check valve and being removable from the valve body, wherein the valve seats are configured to form a sealed unit with the valve body, wherein the seal comprises metal on metal, and wherein the valve seats have a cylindrical and conical part, the seats being conically tapered on the metallically sealed side and the bores accommodating valve seats in the valve body also being provided with a conical and cylindrical section, the difference in gradient between the cones amounting to max. 2 (two) degrees of angle and in an ideal embodiment less than 1 (one) degree of angle.