Ball seat valve for use in injecting device, has diffuser arranged between choke valve and valve seat, and side turned towards seat is provided with narrowing that includes narrowing section turned away from seat

摘要

The valve (110) has a diffuser (128) arranged between a choke valve (126) and a valve seat (120), where the diffuser is provided with a narrowing (134) at a side that is turned towards the valve seat. The narrowing includes length along an inlet axis, which is laid between zero percentage and 50 percentage of a maximum cross section of the diffuser. The narrowing includes a conical-shaped narrowing section that is turned away from the valve seat, where the narrowing includes a reduction of a cross section of an inlet matched to the maximum cross section of the diffuser. An independent claim is also included for an injecting device comprising a control chamber.