초록 ▼

An attenuator valve assembly includes a closure member having one or more attenuator plates associated with it. The closure member have the form of a ball with a bore, a ball calotte, or a butterfly valve disc, etc. The attenuating effect of the attenuator plates are called into play immediately whe

An attenuator valve assembly includes a closure member having one or more attenuator plates associated with it. The closure member have the form of a ball with a bore, a ball calotte, or a butterfly valve disc, etc. The attenuating effect of the attenuator plates are called into play immediately when the closure member is first opened, with the attenuating effect greatest during initial opening of the closure member and diminishing as the closure member is moved toward the completely open position. When the closure member is in the form of a valve disc or ball calotte, the attenuator plates are mounted for rotation with the closure member spaced from the closure member.

대표청구항 ▼

An attenuator valve assembly comprising: a valve body having a flow passage formed therethrough; a closure member comprising a butterfly valve disc; means for mounting said closure member in said valve body for rotation about an axis with respect to said valve body between a completely open position

An attenuator valve assembly comprising: a valve body having a flow passage formed therethrough; a closure member comprising a butterfly valve disc; means for mounting said closure member in said valve body for rotation about an axis with respect to said valve body between a completely open position wherein said closure member allows passage of fluid therepast through said flow passage, and a completely closed position wherein said closure member blocks all flow through said flow passage; sealing means provided in said valve body flow passage for operatively engaging said closure member for preventing fluid flow through said flow passage past said closure member when said closure member is in said closed position; means for attenuating fluid flowing through said flow passage past said closure member, without significantly restricting flow when said closure member is in said completely open position, said means comprising perforated barrier means comprising a plurality of perforated plates mounted with said closure member and spaced from each other in the direction of the flow passage when said closure member is in said closed position; and means for mounting said perforated plates with respect to said closure member so that the attenuating effect of said perforated plates is immediately called into play when said closure member is first opened and the attenuating effect thereof is great during initial opening of said closure member, and diminishes as said closure member is moved toward said completely open position, said mounting means including a plurality of fasteners extending perpendicular to the face of said valve disc, with said plates mounted at spaced positions along said fasteners.