ABOUT D&D / D&I Solution
Moving forward to meet our customers — through challenge and development
D&D is an elevator component manufacturer based in Gimpo, Gyeonggi-do, South Korea, specializing in traction machines, governors, safety gears and other core elevator parts.
Founded in 1995, the name D&D stands for Development and Dash —
“we move forward through relentless development.”
True to that name, D&D has opened markets and developed products head-on.
Today we produce and supply 130 finished products and over 500 part numbers including size variants,
reaching Japan, Vietnam, Thailand, Dubai and beyond.
We are a specialist in elevator machinery and traction machines, backed by proven engineering and professional service.
A HISTORY of growing with our customers
| 2025 | Completed a 30 m test tower for customer collaboration |
|---|---|
| 2019 | Korea's first component safety certification for a safety gear |
| 2018 | Established the D&D R&D Institute |
| 2011 | Established D&D Vina (Vietnam subsidiary) |
| 2007 | Q-MARK certification — ascending car overspeed protection device |
| 2003 | Joint venture with China Ocean Northern Machinery Co., Ltd. |
| 1995.01 | D&D Co., Ltd. founded |
A dedicated R&D division for continuous product improvement and development
Key patent applications
| 2024 | Electronic interlock (landing door lock) — PESSRAL-avoidance method |
|---|---|
| 2022 | High-load overspeed governor (DND-HLGV-001) switch tension — early detection of governor rope slack |
| 2021 | Dual front-and-rear encoder traction machine (Korea's first) |
| 2020 | Drive speed monitoring system for hydraulic elevators |
| 2018 | 4-rail reliability test rig for safety gears |
Key development milestones
| 2025 | 30 m test tower completed •Safety gear drop test rig installed; traction machine reliability testing |
|---|---|
| 2023 | Delivered 10-rail triple-deck safety gear (max. load 137.5 t) |
| 2019 | Delivered 12 t double-deck 10-rail safety gear |
| 2018 | Developed 12 t safety gear (DD-SG12000B) Established the D&D R&D division |
Products with component safety certification
| 2025 | Double-wrap traction machine |
|---|---|
| 2024 | Oil buffer |
| 2023 | PU buffer Belt-type traction machine |
| 2022 | 5 t traction machine |
| 2020 | Overspeed governor Traction machine |
| 2019 | Safety gear (Korea's first) |
Systematic management and continuous improvement — our promise of quality and customer satisfaction.
| 2019 | ISO 14001:2015 / KS I ISO 14001:2015 |
|---|---|
| 2018 | ISO 9001:2015 / KS Q ISO 9001:2015 |
| 2003 | ISO 9002 certification |
