FLUID VALVES HAVING MULTIPLE FLUID FLOW CONTROL MEMBERS.

摘要

A valve trim apparatus includes a first flow control member (218) disposed in a passageway (204) of a fluid valve (200), the first flow control member (218) moves relative to a first orifice (212) of the passageway (204) to provide a first fluid flow characteristic through the passageway (204). A second flow control member (224) is disposed within the passageway (204) and is to move relative to a second orifice(216) of the passageway (204) defined by the first flow control member (218) when the first flow control member (218) is in sealing engagement with the first orifice (212) to provide a second fluid flow characteristic through the passageway (204). The first fluid flow characteristic is different than the second fluid flow characteristic.