Bridge engineering, as a core component of modern transportation infrastructure, demands extremely high welding quality standards. At remote bridge construction sites far from urban power grids, a stable and reliable welding power supply is critical to ensuring project timelines. ENGINE WELDER welding generators, with their proprietary integrated power generation and welding technology, have been proven in bridge construction projects both domestically and internationally.
Welding Challenges at Bridge Construction Sites
Bridge construction sites typically face several common difficulties: distance from mains power, harsh environmental conditions, multiple simultaneous operations, and strict quality requirements. The traditional approach of grid power plus standalone welding machines requires laying long-distance cables, which is costly and difficult to implement across rivers, valleys, and other complex terrain. Engine-driven welding generators combine engine power generation with welding output in a single unit, allowing both welding power supply and auxiliary power output from one machine, significantly simplifying on-site configuration.
ENGINE WELDER HW320DS: Welding Solution for Medium Bridge Components
The HW320DS-EW is ENGINE WELDER’s 300A diesel silent welding generator, powered by a Kubota D905 four-stroke three-cylinder water-cooled engine rated at 19HP with 898CC displacement. Designed specifically for field construction, this model features the following characteristics:
- Welding output: rated current 280DCA, open-circuit voltage 75DCV, duty cycle 50%, current range 45-300DCA, covering common bridge steel structure welding requirements
- Auxiliary power: 10KW output (380V, duty cycle 80%), supporting 10KVA three-phase and 3.3KW×2 single-phase supply for site lighting, drilling equipment, and other power needs
- Silent design: low-noise operation, minimizing impact on the surrounding environment and workers
- IP23 protection class, Class F insulation, suitable for outdoor dust and humidity conditions
- 37L fuel tank capacity for extended runtime, reducing refueling frequency
| Parameter | HW320DS-EW Specification |
|---|---|
| Engine | Kubota D905, 4-stroke 3-cylinder |
| Rated Power | 19HP / 3000rpm |
| Displacement | 898 CC |
| Welding Current Range | 45-300 DCA |
| Rated Welding Current | 280 DCA |
| Open-Circuit Voltage | 75 DCV |
| Auxiliary Power Output | 10KW / 380V |
| Fuel Tank Capacity | 37L |
| Net Weight | 410Kg |
| Dimensions (L×W×H) | 1300×710×803mm |
ENGINE WELDER HW450DS: High-Efficiency Dual-Operator Welding for Large Bridges
For heavy plate welding and high-efficiency construction requirements in large-scale bridge projects, the HW450DS-EW provides a 400A diesel dual-operator silent welding generator solution. Powered by a Kubota D1105 four-stroke three-cylinder water-cooled engine rated at 29.5HP with 1123CC displacement, all performance parameters are significantly enhanced:
- Dual-operator welding: supports two welders working simultaneously without interference (dual mode: 30-200DCA×2), effectively doubling on-site welding efficiency
- Single-operator mode: current range 60-400DCA, meeting heavy plate high-current welding demands
- Auxiliary power: 15KW output (380V, duty cycle 80%), welding and 380V AC can be used simultaneously
- Auto idle stop system: automatic shutdown during idle periods, reducing fuel consumption and engine wear
- Premium models support FCAW self-shielded semi-automatic welding, further expanding process adaptability
| Parameter | HW450DS-EW Specification |
|---|---|
| Engine | Kubota D1105, 4-stroke 3-cylinder |
| Rated Power | 29.5HP / 3000rpm |
| Displacement | 1123 CC |
| Single Welding Current Range | 60-400 DCA |
| Dual Welding Current Range | 30-200DCA ×2 |
| Rated Welding Current | 360 DCA |
| Open-Circuit Voltage | 80 DCV |
| Auxiliary Power Output | 15KW / 380V |
| Fuel Tank Capacity | 37L |
| Net Weight | 510Kg |
| Dimensions (L×W×H) | 1530×710×865mm |
Selection Guidelines and Configuration Recommendations
Based on bridge project scale and welding requirements, the following selection principles apply: for medium and small bridge components, steel box girder assembly, and bridge deck welding, the HW320DS meets the requirements with advantages in portability and cost-effectiveness. For large bridge main towers, heavy plate butt welds, and high-efficiency dual-station welding scenarios, the HW450DS is recommended, as the dual-operator function can nearly double on-site welding efficiency. Actual selection should also consider plate thickness, welding process requirements, site altitude, and temperature conditions.
All ENGINE WELDER products carry CCC certification with rigorous quality management and reliable Kubota engines, making them a trusted choice for bridge construction welding equipment.
Contact Us
For more information about ENGINE WELDER welding generators or technical consultation, please contact:
Phone: +86-10-86468776
Email: denoh@126.com
Website: https://www.denohgroup.com/contact/