THROTTLING CONTROL VALVE Russian patent published in 2006 - IPC F16K3/00 

FIELD: valving.

SUBSTANCE: throttling control valve comprises housing provided with inlet and outlet branch pipes. The branch pipes are in communication with the space separated by means of the seat. The seat has opening and is provided with the conical surface for cooperation with the closure member connected with the rod for permitting overlapping the opening in the seat. The seat has through passage for receiving the throttle member which is made of cylindrical shank connected with the closure member. The shank has at least one beveled surface arranged along the axis of the shank. The cross-section of the through passage is variable so that to define spaces for expanding fluid flowing downstream through the throttle path. The path is defined by the shank and wall of the passage having variable cross-section.

EFFECT: enhanced reliability.

5 cl, 3 dwg