Invention Grant
- Patent Title: Valve trim apparatus having multiple fluid flow control members
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Application No.: US16891988Application Date: 2020-06-03
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Publication No.: US11236845B2Publication Date: 2022-02-01
- Inventor: Jonathan Wesley Richardson , Jesse Creighton Doyle
- Applicant: Fisher Controls International LLC
- Applicant Address: US IA Marshalltown
- Assignee: Fisher Controls International LLC
- Current Assignee: Fisher Controls International LLC
- Current Assignee Address: US IA Marshalltown
- Agency: Hanley, Flight & Zimmerman, LLC
- Main IPC: F16K47/04
- IPC: F16K47/04 ; F16K1/44 ; F16K47/08 ; F16K31/122

Abstract:
Valve trim apparatus having multiple fluid flow control members are disclosed herein. An example valve trim apparatus includes a primary valve seat and a first flow control member having a cavity and a first seating surface. The first flow control member is movable relative to the primary valve seat to control fluid flow between an inlet and an outlet of the fluid valve. A second flow control member is disposed within the cavity. The second flow control member is slidably coupled relative to the first flow control member. A secondary valve seat is coupled to the first flow control member. The second flow control member is to move relative to the secondary valve seat to throttle a fluid flow across the secondary valve seat.
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