Tunable fluid end

A tunable valve seat in a fluid end for high pressure pumping, said fluid end having at least one fluid end resonant frequency;

• wherein said tunable valve seat comprises a lateral support assembly longitudinally-spaced from a mating surface, said lateral support assembly for resiliently coupling said valve seat to a fluid end housing;
• wherein said tunable valve seat has at least one seat resonant frequency similar to at least one said fluid end resonant frequency;
• and
• wherein said mating surface has a concave curvature that forms a circular rolling contact seal with a valve body as the valve body seats against said mating surface, wherein the valve body has a convex peripheral valve seat interface of a correspondingly greater curvature than said mating surface, and wherein said curvature of the mating surface causes said valve seat interface to undergo a substantially elastic concave flexure with slight circular rotation to form the circular rolling contact seal.