A valve assembly comprising a rotary closure element which defines an axis of rotation and is selectively movable between a fully open position and a fully closed position. Mounted to and movable with the rotary closure element is an impedance assembly. The impedance assembly defines an inflow end and an outflow end, and comprises a plurality of fluid passageways of varying noise attenuating capability which extend from the inflow end to the outflow end. Also partially defined by the impedance assembly is a flow opening which extends from the inflow end to the outflow end.
申请公布号
WO03087643(A2)
申请公布日期
2003.10.23
申请号
WO2003US11186
申请日期
2003.04.10
申请人
CONTROL COMPONENTS, INC.
发明人
TRAN, DUC, THANH;NEWTON, RAYMOND, R.;SMIRL, PAUL;BEY, ROGER;BENAC, TINA