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Pioneering the Future of Sealing Technology
Since the establishment of our Research & Development Center, Dongsuh Industry has been at the forefront of material science and fluid containment technology. Our R&D strategy is driven by the mission to localize high-tech sealing components that were once dependent on imports, ensuring national energy security and industrial efficiency.
Pioneering the Future of Sealing Technology
Advancing Industrial Safety through Patented Innovation and National R&D Leadership
With a portfolio of over a dozen patents and a history of leading major national R&D projects, we transform complex engineering challenges into high-performance sealing solutions for the world’s most demanding environments.
New Excellent Product (NEP) Certification
"Proven Excellence in Thermal Power Infrastructure"
Our Graphite Yarn Bonnet Gasket for Power Plant Valves has been recognized with the NEP (New Excellent Product) certification, including a recent extension in 2023. This certification confirms that our technology is a unique, superior solution that significantly enhances the safety and performance of global energy plants.
Innovation Through Engineering: The Future of Sealing
Research & Development Status
Our research team manages a sophisticated portfolio of over a dozen patents, ranging from our NEP-certified Graphite Yarn Bonnet Gaskets to advanced Spring Energized Seals. By leading multiple national R&D projects and collaborating directly with major power utilities, we ensure that our technology stays ahead of the industry’s evolving pressure and temperature demands. At Dongsuh, we don’t just manufacture seals; we engineer the breakthroughs that make global energy infrastructure safer and more efficient.
Corporate Infrastructure & Major Milestones
| Year. Month | Project / Milestone | Organization |
| 2002. 02 | Obtained Certification for Dedicated R&D Department | Korea Industrial Technology Association (KOITA) |
| 2011. 04 | Establishment of Corporate R&D Center | Korea Industrial Technology Association (KOITA) |
| 2023. 05 | New Excellent Product (NEP) Certification (Extension) | [Graphite Yarn Bonnet Gasket for Power Plant Valve Bonnets] |
Patent & Intellectual Property (IP) Registration
| Year. Month | Type | Patent / Project Description |
| 2013. 05 | Patent | Oil measurement and supply device for measuring and supplying oil in pulverizers |
| 2015. 10 | Patent | Graphite Yarn Bonnet Gasket |
| 2016. 09 | Patent | Lever Spring Energized Seal |
| 2017. 08 | Utility Model | Sealing device for blowers |
| 2019. 02 | Patent | Hydraulic sealing device for pumps |
| 2021. 01 | Patent | Metal Seal and its manufacturing method |
| 2022. 02 | Patent | Hydraulic sealing device for pumps (Additional) |
| 2022. 02 | Patent | Valve device |
| 2022. 08 | Patent | Protective cover for valve stems |
National R&D Projects (Government-Led)
| Year. Month | Project Category | Research Description |
| 2007. 12 | National Project | Localization of Gland Packing for high-temp/high-pressure valves and large pumps |
| 2012. 07 | National Project | Localization of Spring Lip (Plug) Seal for power generation facilities |
| 2013. 11 | National Project | Development of High-Viscosity Oil Level Control System for Pulverizer Grinding Rolls |
| 2014. 07 | National Project | Reliability Expansion Project: [Improving Reliability of Spring Energized Seals] |
| 2015. 10 | National Project | Localization of Oil Seals for Pulverizer Grinding Roll Journal Bearings |
| 2017. 12 | National Project | Reliability improvement of sealing products applying Graphite Yarn Bonnet Gasket technology |
| 2018. 02 | National Project | Localization of Hydraulic Actuator Seal Kits for HP/LP Bypass Valves |
| 2019. 11 | National Project | Improvement of non-welded metal seals and reinforced internal auxiliary seals |
| 2021. 04 | National Project | Development of cartridge-type stuffing box for pumps to improve sealing efficiency |
Production Technology R&D
| Year. Month | Project Category | Research Description |
| 2013. 11 | Production R&D | Localization of Braiding Machine Carrier Assembly for Mechanical Packing |
| 2013. 12 | Production R&D | Structural improvement of Spiral Wound Gasket winding machines |
| 2014. 08 | Production R&D | Development of leakage and lifespan testing methods for Synthetic Yarn Mechanical Packing |
| 2014. 09 | Production R&D | Development of lubrication impregnation and coating technology for Mechanical Packing |
| 2014. 12 | Production R&D | Development of mold extraction jigs for large-scale Pressure Seal Gaskets |