Korea seal line(KSL), The Republic of Korea - Komachine Supplier Profile and Product List

- Korea Seal Line Co., Ltd. (KSL) is an industrial parts manufacturer contributing to the stabilization of domestic mechanical seals for over 30 years since its establishment in 1989. A company specializing in the design and manufacture of welded bellows, metal seals, and mechanical seals, requiring high technology and precision. Notably, the successful localization of metal bellows seals for the first time in Korea, recognized for its top-tier technology both domestically and internationally. A capability for supplying a diverse range of high-precision products, including reactor seals and vacuum equipment parts.Korea Seal Line Co., Ltd. (KSL) is an industrial parts manufacturer contributing to the stabilization of domestic mechanical seals for over 30 years since its establishment in 1989. A company specializing in the design and manufacture of welded bellows, metal seals, and mechanical seals, requiring high technology and precision. Notably, the successful localization of metal bellows seals for the first time in Korea, recognized for its top-tier technology both domestically and internationally. A capability for supplying a diverse range of high-precision products, including reactor seals and vacuum equipment parts.
- The main product lines comprise mechanical seals, reactor seals, metal bellows, and vacuum equipment parts, all demanding high technology and precision.The main product lines comprise mechanical seals, reactor seals, metal bellows, and vacuum equipment parts, all demanding high technology and precision.
- A technological prowess in producing cutting-edge material products such as Welded Metal Bellows, Vacuum Components, and Mechanical Seals.A technological prowess in producing cutting-edge material products such as Welded Metal Bellows, Vacuum Components, and Mechanical Seals.
- A broad lineup of metal bellows seals and mechanical seals, including models like MBS Type, HBS Type, FBS Type, GCS Type, MCS Type, MBV Type, K1A Type, K1B Type, K2A Type, K2B Type, K3B Type, K4W Type, K5A Type, SDU Type, SDB Type.A broad lineup of metal bellows seals and mechanical seals, including models like MBS Type, HBS Type, FBS Type, GCS Type, MCS Type, MBV Type, K1A Type, K1B Type, K2A Type, K2B Type, K3B Type, K4W Type, K5A Type, SDU Type, SDB Type.
- The MBS Type metal bellows seals feature unstepped shafts, rotating bellows, single seal balance, and independence of rotation direction, operating within extreme temperature ranges from -40°C to +220°C, pressures up to 25 bar, and sliding velocities of 20 m/s.The MBS Type metal bellows seals feature unstepped shafts, rotating bellows, single seal balance, and independence of rotation direction, operating within extreme temperature ranges from -40°C to +220°C, pressures up to 25 bar, and sliding velocities of 20 m/s.
- Welded bellows seals, certified by the state for their superior technology, demonstrate excellent durability in high-vacuum environments, a core technological strength.Welded bellows seals, certified by the state for their superior technology, demonstrate excellent durability in high-vacuum environments, a core technological strength.
- Over 30 years of accumulated know-how and continuous innovation, contributing to the stabilization of domestic mechanical seals.Over 30 years of accumulated know-how and continuous innovation, contributing to the stabilization of domestic mechanical seals.
- A capability for producing products requiring high technology and precision, along with expertise in utilizing advanced materials.A capability for producing products requiring high technology and precision, along with expertise in utilizing advanced materials.
- Technological leadership through the successful localization of metal bellows seals for the first time in Korea, leading to import substitution effects and export growth.Technological leadership through the successful localization of metal bellows seals for the first time in Korea, leading to import substitution effects and export growth.
- Welded bellows seals, recognized by the state for their superior technology, possess unique durability in high-vacuum conditions, a distinct technological advantage.Welded bellows seals, recognized by the state for their superior technology, possess unique durability in high-vacuum conditions, a distinct technological advantage.
- A strong commitment to customer satisfaction through management principles and a quality management system, ensuring high product quality and competitiveness.A strong commitment to customer satisfaction through management principles and a quality management system, ensuring high product quality and competitiveness.
- The establishment and operation of safety, environmental, and health management systems for pollution prevention and the creation of a safe and pleasant working environment.The establishment and operation of safety, environmental, and health management systems for pollution prevention and the creation of a safe and pleasant working environment.
- Supply of products with excellent durability in high-vacuum environments for the semiconductor equipment industry.Supply of products with excellent durability in high-vacuum environments for the semiconductor equipment industry.
- Application of components in high-temperature and high-pressure equipment within the petrochemical and refining industries.Application of components in high-temperature and high-pressure equipment within the petrochemical and refining industries.
- Provision of products to various industrial sites demanding high technological capabilities, such as vacuum equipment and power plants.Provision of products to various industrial sites demanding high technological capabilities, such as vacuum equipment and power plants.
- Extensive application in the nuclear and gas industries, as well as shipbuilding sectors.Extensive application in the nuclear and gas industries, as well as shipbuilding sectors.
- Diverse applications in advanced industrial fields, including high-brightness LEDs, EV core devices and components in environmental energy, valve opening/closing fluid flow control, medical equipment parts (bellows sensor protection for blood pressure monitors), and high-pressure special welded bellows for aerospace and defense industries.Diverse applications in advanced industrial fields, including high-brightness LEDs, EV core devices and components in environmental energy, valve opening/closing fluid flow control, medical equipment parts (bellows sensor protection for blood pressure monitors), and high-pressure special welded bellows for aerospace and defense industries.
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- Acquisition of ISO9001 and ISO14001 quality and environmental management system certifications in 2022.Acquisition of ISO9001 and ISO14001 quality and environmental management system certifications in 2022.
- Designation as a Global Hidden Champion 1000+ enterprise and certification as a specialized "Root Technology" company in 2023.Designation as a Global Hidden Champion 1000+ enterprise and certification as a specialized "Root Technology" company in 2023.
- Possession of certifications as a specialized material and component company and a product-specific authorized exporter in 2022.Possession of certifications as a specialized material and component company and a product-specific authorized exporter in 2022.
- Recognition as an exemplary long-standing enterprise by Ulsan Metropolitan City in 2025.Recognition as an exemplary long-standing enterprise by Ulsan Metropolitan City in 2025.
- The CEO, Ji Yong-gyu, received the Minister's Commendation for Science and Technology Promotion in 2022, acknowledging contributions to the development of the first plasma-welded metal bellows based on proprietary technology and the localization of advanced material components.The CEO, Ji Yong-gyu, received the Minister's Commendation for Science and Technology Promotion in 2022, acknowledging contributions to the development of the first plasma-welded metal bellows based on proprietary technology and the localization of advanced material components.
- Patent applications include one for a cutting tool insert with easy precision adjustment in 2021 and another for a method of manufacturing a seal plate for scroll compressors in 2020.Patent applications include one for a cutting tool insert with easy precision adjustment in 2021 and another for a method of manufacturing a seal plate for scroll compressors in 2020.