Corrugated furnace, wet back design boiler with three pass fire tube
WNS gas/oil boiler adopts horizontal fire tube structure, which can provide larger steam/water output. Three pass wet-back design, larger corugated furmace, thread smoke tube with unique expansion welding technique, high quality and environmental protection.
| Output: | Steam, Hot-water |
| Capacity: | 0.1ton-40ton, 100kg-40000kg, 99kw-28000kw |
| Work Pressure: | 3-38bar, 0.3-3.8Mpa |
| Heat Temperature: | 0-450℃ |
| Applied Industry: | Food, Beverage, Feed, Textile, Paper, Chemical, Package, Refinery, Pharm, Building Material, Hotel... |
Introduction
Professional & Advanced Boiler for Multiple Applications
The WNS series is a fully automatic, horizontal gas/oil-fired boiler engineered for high-efficiency production of saturated steam, hot water, or superheated steam.
Its innovative three-pass, fire-tube horizontal design incorporates a large corrugated furnace and threaded smoke tubes, significantly expanding the heating surface and enhancing thermal efficiency. Equipped with an finned tube economizer and an intelligent PLC control system for seamless multi-system coordination, this robust boiler delivers reliable performance with a service life exceeding 25 years.
Yuanda Boiler offers premium fire tube steam boiler(steam generator) (WNS & LHS series) in capacities from 0.5ton to 20ton, water tube steam generador(LSS series) in capacities from 100kg to 500kg. For space limited, please consider our LHS/LSS vertical boiler, or skid-mounted boiler.
✔ Food & Beverage Processing (Sterilization, Cooking)
✔ Textile & Paper Mills (Dyeing, Drying)
✔ Chemical & Pharmaceutical (Reactor Heating)
✔ Hospital & Hotel (Sanitation, Laundry)
✔ And other industrial and commercial production...
✅ Multiple Capacity Options:
8HP, 10HP, 20HP, 30HP, 50HP, 80HP, 100HP...1200HP (Customizable)
Steam Output: 100 kg/h (7HP) to 20000 kg/h (1200HP)
Horizontal or vertical boiler available
✅ Fuel Flexibility:
Gas LP/Natural (Propane/Butane) – Clean combustion, low emissions
Diesel – High energy density, ideal for remote operations
Dual-Fuel (Gas + Diesel) – Backup-ready for uninterrupted production
✅ Advanced Engineering:
3-Pass Fire Tube Design, Corrugared Wet Back (WNS Series) – Maximizes heat transfer (≥98% efficiency)
Compact LHS LSS Vertical Boilers – Space-saving, fast steam generation
Automated Control System – Precise pressure/temperature regulation
✅ Durable & Safe:
ASME/CE Certified – High quality, compliant with international standards
Safety Protections – Low-water cutoff, overpressure valve, flame failure detection
Europe Original Import Burner.
✅ Plug&Play:
Skid Mounted Boiler System – Pre-installed, self-contained boiler system mounted on a steel base (skid) for easy transport, free of installation.
✔ Compact design saves space and costs – Smaller footprint, radiation losses and larger fuel savings
✔ Faster steam production = reduced downtime – No more waiting for steam.
✔ Energy-efficient operation – Cuts fuel use, saving you money long-term.
✔ Reliable, high-quality steam – Dry, saturated steam (97%+) for consistent performance.
✔ Eco-friendly – Optimized combustion reduces waste and resource consumption.
■ Founded in 1956, quality supplier inspected by SGS Group
■ CE ISO quality certified
■ More than 17 years of export experience, gold medal supplier, guaranteed payment and delivery
■ Integrating research&development production and sales
■ Support video/VR or third party factory inspection
■ Exported to 132 countries, more than 100,000 customers
Why believe Yuanda boiler quality?
(1) Strength calculation report with applied materials information;
(2) 100%NDT(non-destructive inspection) report of steel plate, tube and welding rod;
(3) 100% X-ray inspection( (Longitudinal, transversal safety inspection)): ensure the quality of entire boiler;
(4) Hydrostatic test: ensure the standard working pressure and safety;
(5) Third-party inspection report
(6) Passed ASME CE ISO DOSH EAC GOST boiler level certificate.
Service
Comprehensive Boiler Solutions – From Planning to Lifetime Support
Pre-Sales Support:Expert Design Guidance: Help you select the optimal boiler model tailored to your industry needs.
Detailed Technical Documentation: Provide certificates, CAD drawings, consumption analysis, and boiler room planning.
Customized Solutions: Deliver complete system designs including installation material lists.
Competitive Pricing: Factory-direct rates with uncompromised quality.
After-Sales Assurance:Genuine Spare Parts: Original components with reliable supply.
Global Installation & Commissioning: Overseas engineer dispatch available.
On-Site Training: Ensure safe and efficient operation.
24/7 Online Support: Rapid response for any technical needs.
Warranty & Lifelong Care: One-year free maintenance and lifetime service support.
Parameter
| Model | Horsepower | Rated steam output | Rated pressure | Rated temperature | Feed water temperature | Fuel consumption | |
| (hp) | (Ton/hr) | (Mpa) | (℃) | (℃) | Light diesel oil(kg/h) | Natural gas(Nm3/h) | |
| LSS0.1 | 7hp | 0.1 | 0.4/0.7 mpa | 130～171 | 20/105 | 6.7 | 7.3 |
| LSS0.2 | 15hp | 0.2 | 130～171 | 20/105 | 12.8 | 17 | |
| LSS0.3 | 25hp | 0.3 | 130～171 | 20/105 | 19.2 | 25.5 | |
| LHS0.5/LSS0.5/WNS0.5 | 35hp | 0.5 | 130～171 | 20/105 | 32 | 42.5 | |
| LHS0.7/WNS0.7 | 50hp | 0.7 | 130～171 | 20/105 | 49.5 | 51 | |
| LHS1/WNS1 | 65hp | 1.0 | 0.4/0.7/1.0/1.25/1.6/2.5/3.0 mpa | 130～185 | 20/105 | 70 | 80 |
| LHS1.5/WNS1.5 | 100hp | 1.5 | 130～185 | 20/105 | 108.7 | 115.4 | |
| LHS2/WNS2 | 125hp | 2 | 130～185 | 20/105 | 135.2 | 150.4 | |
| WNS3 | 200hp | 3 | 130～226 | 20/105 | 192.9 | 212.1 | |
| WNS4 | 250hp | 4 | 130～226 | 20/105 | 258.2 | 283.4 | |
| WNS5 | 300hp | 5 | 130～226 | 20/105 | 323.5 | 354.7 | |
| WNS6 | 350hp | 6 | 130～226 | 20/105 | 388.6 | 424.2 | |
| WNS8 | 500hp | 8 | 130～226 | 20/105 | 514.6 | 566.3 | |
| WNS10 | 600hp | 10 | 130～226 | 20/105 | 641.7 | 707.8 | |
| WNS12 | 720hp | 12 | 130～226 | 20/105 | 768.9 | 849.3 | |
| WNS15 | 900hp | 15 | 130～226 | 20/105 | 960.1 | 1061.7 | |
| WNS20 | 1200hp | 20 | 130～226 | 20/105 | 1276.2 | 1415.8 | |
| Model |
Rated heating capacity (mw) |
Rated working pressure (Mpa) |
Output water temperature (℃) |
Return water temperature (℃) |
Fuel consumption | |
| Light diesel oil(kg/h) | Natural gas(Nm3/h) | |||||
| WNS 0.35 | 0.35mw | Atmospheric pressure/0.7/1.0/1.25/1.6 | 85~130 ℃ | 70/60 ℃ | 31.6 | 36.6 |
| WNS 0.7 | 0.7mw | Atmospheric pressure/0.7/1.0/1.25/1.6 | 85~130 ℃ | 70/60 ℃ | 60.4 | 69.3 |
| WNS 1.4 | 1.4mw | Atmospheric pressure/0.7/1.0/1.25/1.6 | 85~130 ℃ | 70/60 ℃ | 122.8 | 146.1 |
| WNS 2.1 | 2.1mw | Atmospheric pressure/0.7/1.0/1.25/1.6 | 85~130 ℃ | 70/60 ℃ | 192.3 | 227.1 |
| WNS 2.8 | 2.8mw | Atmospheric pressure/0.7/1.0/1.25/1.6 | 85~130 ℃ | 70/60 ℃ | 246.1 | 286.5 |
| WNS 4.2 | 4.2mw | Atmospheric pressure/0.7/1.0/1.25/1.6 | 85~130 ℃ | 70/60 ℃ | 367.1 | 412.6 |
| WNS 5.6 | 5.6mw | Atmospheric pressure/0.7/1.0/1.25/1.6 | 85~130 ℃ | 70/60 ℃ | 490.2 | 543.7 |
| WNS 7.0 | 7.0mw | Atmospheric pressure/0.7/1.0/1.25/1.6 | 85~130 ℃ | 70/60 ℃ | 593.6 | 660.7 |
| WNS 10.5 | 10.5mw | Atmospheric pressure/0.7/1.0/1.25/1.6 | 85~130 ℃ | 70/60 ℃ | 936.5 | 998.8 |
| WNS 14 | 14mw | Atmospheric pressure/0.7/1.0/1.25/1.6 | 85~130 ℃ | 70/60 ℃ | 1200.8 | 1330.7 |
| Note: for place limited, we didn't list all models, if you need other capacity, pressure, fuel, please send us inquiry directly, we will send you detailed parameter. | ||||||
Relate Cases
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