Invention Grant
- Patent Title: Fluid valve assembly and a process valve positioner
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Application No.: US15556141Application Date: 2016-03-15
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Publication No.: US10598194B2Publication Date: 2020-03-24
- Inventor: Jan Gunell , Kalle Vuorio
- Applicant: METSO FLOW CONTROL OY
- Applicant Address: FI Vantaa
- Assignee: METSO FLOW CONTROL OY
- Current Assignee: METSO FLOW CONTROL OY
- Current Assignee Address: FI Vantaa
- Agency: Oliff PLC
- Priority: FI20155177 20150316
- International Application: PCT/FI2016/050159 WO 20160315
- International Announcement: WO2016/146890 WO 20160922
- Main IPC: F16K11/04
- IPC: F16K11/04 ; F16K31/126 ; F15B13/042 ; F16K11/044 ; F16K11/048 ; F15B13/043 ; F15B5/00 ; F15B13/04

Abstract:
A fluid valve assembly for controlling a single-acting or double-acting actuator comprises a valve body having a central bore with at least one supply port for receiving a supply of fluid under pressure, at least one actuator port (C1,C2) for providing a control fluid pressure to an actuator, and at least one exhaust port (EX1,EX2). At least one pair of counter-acting metering edges operationally tied together by a stem movable within central bore in an axial direction a pilot force. Each metering edge of each counter-acting pair comprises a mating seat surface (PS1,PS2,PS3,PS4) on the valve body or the stem, and a poppet ring (PR1,PR2, PR3,PR4) supported by a flexible element (SD1,SD2,SD3,SD4) to the valve body or the stem in a manner allowing a relative axial movement of the poppet ring and the supporting valve body or stem also in a closed state of the respective metering edge.
Public/Granted literature
- US20180045227A1 A FLUID VALVE ASSEMBLY AND A PROCESS VALVE POSITIONER Public/Granted day:2018-02-15
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