# US 11,898,656 B1 · Packing for a high-pressure valve > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,898,656 B1 - Document ID: US11898656B1 - Status: Granted - Kind: B1 - Application number: 18/146,060 - Filed: 2022-12-23 - Granted: 2024-02-13 - Earliest claimed: 2022-12-23 - Assignees: Dresser, Inc. - Applicants: Dresser, LLC - Inventors: Aurelien Reau; Mickael Olaya; Arnaud Riviere; Romain Chenu; Valentin Mercier - Web page: https://patentgrep.com/patent/US11898656B1 ## CPC - F16K 41/02: with stuffing-box {; Sealing rings} - F16K 41/04: with at least one ring of rubber or like material between spindle and housing - F16J 15/104: {characterised by structure} - F16K 27/00: Construction of housing (methods for welding housings B23K); Use of materials therefor - F16K 27/02: of lift valves (for reducing the flow resistance of screw-spindle lift-valves F16K1/06) - 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)} - F16J: PISTONS {(specially adapted for dampers F16F9/32)}; CYLINDERS; SEALINGS ## Abstract A valve bonnet defines a packing box having an inner surface Roughness Average (Ra) of 0.15 or less, for example, between 0.10 and 0.15. Multiple Polytetrafluoroethylene (PTFE) packing rings are in a packing stack. A packer is bolted to the bonnet and extends into the packing box. The packer is configured to apply a packing pressure on the packing, for example, between 100 megapascals (MPa) and 200 MPa. Such arrangements can allow for high pressure valves, for example valves that can retain up to 10,000 pounds per square inch (PSI) of pressure or up to 15,000 PSI. ## Claims ### Claim 1 A high-pressure valve comprising: a valve bonnet defining a packing box having an inner surface Roughness Average (Ra) of 0.15 or less; a plurality of Polytetrafluoroethylene (PTFE) packing rings in a packing stack; and a packer bolted to the bonnet and extending into the packing box, the packer configured to apply a packing pressure on the packing, wherein the packing pressure is between 100 megapascals (MPa) and 200 MPa. ### Claim 2 (depends on 1) The high-pressure valve of claim 1, further comprising anti-extrusion rings within the packing stack. ### Claim 3 (depends on 2) The high-pressure valve of claim 2, wherein the anti-extrusion rings comprise materials harder than PTFE. ### Claim 4 (depends on 2) The high-pressure valve of claim 2, wherein the anti-extrusion rings are at opposite ends of the packing stack. ### Claim 5 (depends on 1) The high-pressure valve of claim 1, further comprising: a valve body attached to the valve bonnet; a valve stem extending though the valve bonnet and into the valve body, the valve stem defining an outer surface having an Ra of 0.15 or less; and a metal gasket between the valve bonnet and the valve body. ### Claim 6 (depends on 5) The high-pressure valve of claim 5, wherein the metal gasket comprises a substantially T-shaped profile. ### Claim 7 (depends on 5) The high-pressure valve of claim 5, wherein the valve is configured to retain pressures of 10,000 pounds per square inch. ### Claim 8 A high-pressure valve comprising: a valve bonnet defining a packing box having an inner surface Roughness Average (Ra) between 0.10 and 0.15; a plurality of Polytetrafluoroethylene (PTFE) packing rings in a packing stack; a packer bolted to the bonnet and extending into the packing box, the packer configured to apply a pressure on the packing; a valve body; a valve stem extending though the valve bonnet and into the valve body, the valve stem defining an outer surface having an Ra of 0.15 or less; and a metal gasket between the valve bonnet and the valve body, wherein the valve is configured to retain pressures of at least 10,000 pounds per square inch. ### Claim 9 (depends on 8) The high-pressure valve of claim 8, wherein the packing pressure is between 100 megapascals (MPa) and 200 MPa. ### Claim 10 (depends on 8) The high-pressure valve of claim 8, further comprising anti-extrusion rings within the packing stack. ### Claim 11 (depends on 10) The high-pressure valve of claim 10, wherein the anti-extrusion rings comprise carbon and Inconel. ### Claim 12 (depends on 10) The high-pressure valve of claim 10, wherein the anti-extrusion rings are at opposite ends of the packing stack. ### Claim 13 (depends on 8) The high-pressure valve of claim 8, wherein the metal gasket comprises a self-energized or pressure energized gasket. ### Claim 14 (depends on 8) The high-pressure valve of claim 8, wherein the valve is configured to retain pressures of up to 15,000 pounds per square inch. ### Claim 15 A method comprising: providing valve packing comprising Polytetrafluoroethylene (PTFE) packing rings; inserting the provided valve packing into a packing box, the packing box having an inner surface roughness of Roughness Average (Ra) of 0.15 or less; and applying between 100 megapascals (MPa) and 200 MPa to the valve packing by a packer. ### Claim 16 (depends on 15) The method of claim 15, wherein a valve stem extends through the valve, the valve stem defining an outer surface having an Ra of 0.15 or less. ### Claim 17 (depends on 15) The method of claim 15, wherein the packing box is attached to a valve, the method further comprising: retaining pressure within the valve by the valve packing. ### Claim 18 (depends on 17) The method of claim 17, wherein the pressure is 10,000 PSI. ### Claim 19 (depends on 15) The method of claim 15, further comprising: providing anti-extrusion rings; and inserting the anti-extrusion rings into the packing box. ### Claim 20 (depends on 19) The method of claim 19, further comprising: arranging an anti-extrusion ring on either side of the PTFE packing rings prior to inserting the valve packing into the packing box.