US 12,422,057 B2
Control valves and cages that are adapted to reduce flashing and cavitation
Zhimin Sun, Tianjin (CN); and Zhengyu Chen, Tianjin (CN)
Assigned to EMERSON PROCESS MANAGEMENT (TIANJIN) VALVE CO., LTD., Tianjin (CN)
Filed by EMERSON PROCESS MANAGEMENT (TIANJIN) VALVE CO., LTD., Tianjin (CN)
Filed on Jul. 18, 2023, as Appl. No. 18/223,396.
Application 18/223,396 is a continuation of application No. 16/530,802, filed on Aug. 2, 2019, granted, now 11,703,146.
Claims priority of application No. 201810876230.2 (CN), filed on Aug. 3, 2018; and application No. 201821244835.1 (CN), filed on Aug. 3, 2018.
Prior Publication US 2023/0358335 A1, Nov. 9, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. F16K 47/08 (2006.01)
CPC F16K 47/08 (2013.01) 21 Claims
OG exemplary drawing
 
1. A cage for a control valve, the cage comprising:
a body having an upper portion, a lower portion, an inner wall defining a central bore, an outer wall disposed radially outward of the inner wall, and an intermediate wall disposed between the inner wall and the outer wall;
an inlet opening formed in the inner wall;
an outlet opening formed in the outer wall;
a flow passage defined by the inner wall, the outer wall, and the intermediate wall, the flow passage fluidly connecting the inlet opening to the outlet opening;
a plurality of first protrusions carried by and extending radially from the inner wall and/or the outer wall and into the flow passage;
a plurality of second protrusions extending radially from the intermediate wall and into the flow passage, such that the plurality of second protrusions cooperate with the plurality of first protrusions to define a series of pressure drops for fluid flowing from the inlet opening to the outlet opening.