Patent ID: 8602321

Claim:
A ball seat valve for adjusting a flow of a fluid medium, comprising: a valve seat; a rounded ball-shaped closure member for the valve seat; an inlet with a choke valve; a diffusor situated between the choke valve and the valve seat, wherein the diffusor has a constriction at its end oriented toward the valve seat, and wherein the constriction has a reduction of a cross section of the inlet, relative to a maximum cross section of the diffusor, of 30 to 70%; wherein the diffusor has a cylindrical diffusor section upstream of the constriction and a conical diffuser section upstream of the constriction, and wherein the ball seat valve has a valve body with a parting line that extends through the valve body at a transition between the cylindrical diffusor section and the conical diffusor section to divide the valve body into two units.