Yarn and gland packing
A gland packing using a tubular member of knitted metal wires filled with high-temperature-resistant fibers like alumina, silicon carbide, or basalt, addresses the limitations of expanded graphite and ceramic fibers, ensuring effective sealing under extreme conditions.
JP2025119455APending Publication Date: 2025-08-14NIPPON PILLAR PACKING CO LTD
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Patent Information
- Application Number
- JP2024014354
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-02-01
- Publication Date
- 2025-08-14
AI Technical Summary
Technical Problem
Existing gland packings made from expanded graphite or ceramic fibers fail to withstand high temperatures (900°C) and pressures (40 MPa) due to oxidation, low abrasion resistance, and poor fiber bonding.
Method used
A gland packing composed of a tubular member made by knitting metal wires and filled with alumina, silicon carbide, boron, or basalt fibers, optionally with an inorganic filler, providing high heat and abrasion resistance.
Benefits of technology
The proposed gland packing can operate under high temperature (900°C) and pressure (40 MPa) conditions with improved durability and sealing performance.
✦ Generated by Eureka AI based on patent content.
Abstract
To provide a gland packing that can be used even under a high-temperature and high-pressure use condition.SOLUTION: A yarn includes: a cylindrical member configured by knitting a metal wire; and a filling fiber that is filled into the cylindrical member, where the filling fiber is constituted of at least one fiber material selected from an alumina fiber, a silicon carbide fiber, a boron fiber, an AES fiber, and a basalt fiber. A gland packing is constituted of braiding a plurality of the yarn.SELECTED DRAWING: Figure 2
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