# US 2010/0163769 A1 · Flow control valve for fluidized material > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2010/0163769 A1 - Document ID: US20100163769A1 - Status: Published application - Kind: A1 - Application number: 12/160,754 - Filed: 2006-11-30 - Published: 2010-07-01 - Earliest claimed: 2006-01-11 - Assignees: Paul Wurth S.A. - Inventors: Yvan Kroemmer; Emanuele Censi - Web page: https://patentgrep.com/patent/US20100163769A1 ## CPC - F16K 5/204: {with the plugs or parts of the plugs mechanically pressing the seals against the housing} - F16K: VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING {(devices for emptying and evacuating the excess liquid in valves or conduits F16L55/07)} ## Abstract “A flow control valve for fluidized material comprises a valve housing having a valve chamber with a valve seat and a valve plug having a flow passage, the valve plug being arranged inside the valve chamber in front of the valve seat (30) so as to be rotatable about an axis of rotation for controlling a flow through the flow control valve. It further comprises spring means biasing the valve plug against the valve seat perpendicularly to the axis of rotation, for achieving a sealing contact between the valve seat and the valve plug. According to an important aspect of the invention, the spring means comprises at least one cantilever spring (40) arranged in a clearance space opposite to the valve seat (30) so as to bias the valve plug against the valve seat.” ## Claims ### Claim at position 1 1-12. (canceled) ### Claim 13 A flow control valve for fluidized material comprising: a valve housing having a valve chamber with a valve seat; a valve plug having a flow passage, said valve plug being arranged inside said valve chamber in front of said valve seat so as to be rotatable about an axis of rotation for controlling a flow through said flow control valve and said valve plug comprises a cylindrical plug biasing surface; and at least one cantilever spring arranged in a clearance space opposite to said valve seat, said cantilever spring being fixed to said valve housing and having an end portion in contact with said cylindrical plug biasing surface so as to bias said valve plug against said valve seat perpendicularly to said axis of rotation for achieving a sealing contact between said valve seat and said valve plug. ### Claim 14 (depends on 13) The flow control valve according to claim 13, wherein said at least one cantilever spring is a rod spring with a first end portion spring biasing said valve plug against said valve seat and a second end portion fixed to said valve housing. ### Claim 15 (depends on 14) The flow control valve according to claim 14, wherein said rod spring tapers towards its first end portion. ### Claim 16 (depends on 15) The flow control valve according to claim 15, wherein said rod spring comprises a saddle member mounted on a first end portion of said rod spring and having a contact surface conformed to the outer cylindrical plug biasing surface of said valve plug. ### Claim 17 (depends on 16) The flow control valve according to claim 16, further comprising an adjustment device supporting said second end portion of said rod spring, said adjustment device allowing the axial position of said rod spring with respect to said valve plug to be set. ### Claim 18 (depends on 17) The flow control valve according to claim 17, wherein said adjustment device comprises an operating portion for setting the axial position of said rod spring, said operating portion protruding from said valve housing. ### Claim 19 (depends on 13) The flow control valve according to claim 13, wherein two pairs of cantilever springs are arranged in corresponding clearance spaces tangentially with respect to said valve plug and on opposing sides of a flow channel through said valve housing. ### Claim 20 (depends on 19) The flow control valve according to claim 19, wherein the cantilever springs of each pair are arranged in parallel and two cantilever springs of either pair are arranged in opposing coaxial relationship. ### Claim 21 (depends on 13) The flow control valve according to claim 13, further comprising an actuating shaft mounted rotatable in said valve housing and an Oldham coupling which couples said valve plug to said actuating shaft. ### Claim 22 (depends on 21) The flow control valve according to claim 21, wherein said clearance space is arranged perpendicular to the axis of said actuating shaft in said valve housing. ### Claim 23 (depends on 13) The flow control valve according claim 13, wherein said valve plug comprises an essentially cylindrical hollow body having a cylindrical plug sealing face in contact with a corresponding sealing face of said valve seat. ### Claim 24 (depends on 13) The flow control valve according to claim 13, wherein said flow control valve is comprised in a pulverized coal injection system for a blast furnace. ### Claim 25 A flow control valve for fluidized material comprising: a valve housing having a valve chamber with a valve seat; a valve plug having a flow passage, said valve plug being arranged inside said valve chamber in front of said valve seat so as to be rotatable about an axis of rotation for controlling a flow through said flow control valve and said valve plug comprises a cylindrical plug biasing surface; at least one cantilever spring arranged in a clearance space opposite to said valve seat, said cantilever spring being fixed to said valve housing and having an end portion in contact with said cylindrical plug biasing surface so as to bias said valve plug against said valve seat perpendicularly to said axis of rotation for achieving a sealing contact between said valve seat and said valve plug; and an adjustment device supporting said second end portion of said cantilever spring, said adjustment device allowing the axial position of said cantilever spring with respect to said valve plug to be set. ### Claim 26 (depends on 25) The flow control valve according to claim 25, wherein said adjustment device comprises an operating portion for setting the axial position of said cantilever spring, said operating portion protruding from said valve housing. ### Claim 27 (depends on 26) The flow control valve according to claim 26, wherein said at least one cantilever spring is a rod spring with a first end portion spring biasing said valve plug against said valve seat and a second end portion fixed to said valve housing. ### Claim 28 (depends on 27) The flow control valve according to claim 27, wherein said rod spring tapers towards its first end portion and comprises a saddle member mounted on a first end portion of said rod spring and having a contact surface conformed to the outer cylindrical plug biasing surface of said valve plug. ### Claim 29 (depends on 28) The flow control valve according to claim 28, wherein two pairs of rod springs are arranged in corresponding clearance spaces tangentially with respect to said valve plug and on opposing sides of a flow channel through said valve housing. ### Claim 30 (depends on 29) The flow control valve according to claim 29, wherein the rod springs of each pair are arranged in parallel and two rod springs of either pair are arranged in opposing coaxial relationship. ### Claim 31 (depends on 30) The flow control valve according to claim 30, further comprising an actuating shaft mounted rotatable in said valve housing and an Oldham coupling which couples said valve plug to said actuating shaft. ### Claim 32 (depends on 31) The flow control valve according to claim 31, wherein said clearance space is arranged perpendicular to the axis of said actuating shaft in said valve housing. ### Claim 33 (depends on 32) The flow control valve according claim 32, wherein said valve plug comprises an essentially cylindrical hollow body having a cylindrical plug sealing face in contact with a corresponding sealing face of said valve seat. ### Claim 34 A flow control valve for fluidized material comprising: a valve housing having a valve chamber with a valve seat; a valve plug having a flow passage, said valve plug being arranged inside said valve chamber in front of said valve seat so as to be rotatable about an axis of rotation for controlling a flow through said flow control valve and said valve plug comprises a cylindrical plug biasing surface; and at least one cantilever spring arranged in a clearance space opposite to said valve seat, said cantilever spring being fixed to said valve housing and having an end portion in contact with said cylindrical plug biasing surface so as to bias said valve plug against said valve seat perpendicularly to said axis of rotation for achieving a sealing contact between said valve seat and said valve plug. wherein two pairs of cantilever springs are arranged in corresponding clearance spaces tangentially with respect to said valve plug and on opposing sides of a flow channel through said valve housing. ### Claim 35 (depends on 34) The flow control valve according to claim 34, wherein the cantilever springs of each pair are arranged in parallel and two cantilever springs of either pair are arranged in opposing coaxial relationship. ### Claim 36 (depends on 34) The flow control valve according to claim 34, wherein said at least one cantilever spring is a rod spring with a first end portion spring biasing said valve plug against said valve seat and a second end portion fixed to said valve housing, said rod spring tapering towards its first end portion. ### Claim 37 (depends on 34) The flow control valve according to claim 34, wherein said rod spring comprises a saddle member mounted on a first end portion of said rod spring and having a contact surface conformed to the outer cylindrical plug biasing surface of said valve plug. ### Claim 38 (depends on 34) The flow control valve according to claim 34, further comprising an adjustment device supporting said second end portion of said rod spring, said adjustment device allowing the axial position of said rod spring with respect to said valve plug to be set and comprising an operating portion for setting the axial position of said rod spring, said operating portion protruding from said valve housing.