Intelligent Steam Solutions, Engineered for Value
Backed by decades of expertise, we deliver core value:
• Proven Durability: Reliable performance built for long-term operation.
• Direct Cost Reduction: High-efficiency design that lowers your operating expenses.
• Simplified Ownership: Easy-to-maintain systems backed by accessible support.
Where Reliability Meets Smart Engineering.
Why Partner With Us?
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EU Certified
Our steam generators are fully certified to the PED and Machinery Directive standards, ensuring compliance and safety for the European market.
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Easy Installation
Simplified setup processallows for quick and straightforward installation, getting your operation up and running faster while reducing initial setup costs.
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101% Efficiency
Advanced condensing technology deliversunmatched thermal efficiency, cutting energy costs by10-30%versus traditional boilers.
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<20mg/m³ NOx
Full premixed low-NOx combustion technology ensuresultra-clean emissions, meeting the most stringent environmental standards.
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Safety by Design
Built withmultiple automatic protection systemsand rigorous quality control for guaranteed safe and stable operation.
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Quick Steam-on-Demand
Rapid startup capability delivers steamwhen you need it, optimizing energy use and improving operational flexibility.
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Space-Saving
Compact footprintprovides flexible installation options, making it ideal for facilities with limited space.
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Global Support Network
Accessprofessional technical supportand coordinated local service solutions through our international partner network.
Let’s be honest: you install an electric boiler, and your electricity bill gently whispers, “Remember me every month.” It’s quiet and “clean,” until you realize you’re basically funding a small power plant.
Or maybe you stick with a traditional coal boiler—the reliable but grumpy old-timer. It needs its own room, regular check-ups, and has a special talent for making friends with environmental inspectors (not in a good way). It’s “retro,” but not exactly future-proof.
Maybe it’s time to meet someone new.
| Aspect | stellergyboiler | Traditional Coal Boiler | Electric Boiler |
|---|---|---|---|
| Efficiency | High efficiency up to 101% with condensing heat recovery technology. Saves 10–30% energy compared to conventional systems. |
Low thermal efficiency (typically below 85%). Significant heat loss through flue gas and radiation. | High electrical efficiency, but overall energy efficiency is low due to power generation and grid losses. High indirect carbon footprint. |
| Environmental Impact | Ultra-low NOx emissions (<30 mg/m³), compliant with strict EU regulations. Clean combustion, no SO₂ or particulate matter. | High emissions of SO₂, NOx, dust, and CO₂. Does not meet modern EU environmental standards. | Zero local emissions, but relies on grid electricity—often generated from fossil fuels—resulting in high indirect CO₂ emissions. |
| Safety & Compliance | Non-pressure vessel design, no annual inspection required. Multiple automatic safety protections. Remote real-time monitoring. | Pressure vessel, requires regular inspections and certified operators. Higher risk of accidents. | Electrical risks: short circuits, overloads. Requires high-capacity power supply and safety systems. |
| Operating Costs | Lower fuel costs with high efficiency. Minimal maintenance, no need for dedicated operators. | Low coal cost, but high additional costs for emissions treatment, ash disposal, and manual labor. | Extremely high electricity costs, especially with industrial tariffs in Europe. Highest operational expense. |
| Smart Control | IoT-enabled remote monitoring & control, automatic adjustment, fault alarms, dual variable frequency drives for optimal output. | Manual operation, reliant on operator experience. No smart features. | Basic controls available, but lacks advanced system integration, remote optimization, and predictive maintenance. |
| Installation & Maintenance | Compact, modular design. No dedicated boiler room needed. Quick installation, plug-and-play setup. | Requires boiler room, chimney, coal storage, and complex infrastructure. Long installation time. | Simple installation but needs high-power electrical connection, grid upgrades, and safety approvals. |
Development History
1994
Yongjie Company established, entering thermal energy industry.
1997
Beijing Oriental Yongjie Thermal Energy Tech Center established, exclusive partner of France De Dietrich worldwide.
2002
Signed Beijing Xiaohuangzhuang Project, 15 sets of 2-ton De Dietrich boiler parallel units, world's largest boiler parallel project.
2003
Beijing Oriental Yongjie Heating Energy-saving Tech Co., Ltd. established.
2007
Beijing Century Aipusen Energy Tech Co., Ltd. founded in Beijing, focusing on gas-fired boiler R&D & production.
2008
Yongjie Enterprise completed China's first commercial cast silicon-aluminum condensing boiler project in Beijing.
2013
Yongjie Enterprise established second after-sales service base in Shasha River, Changping, Beijing.
2015
Beijing Oriental Yongjie Huitong Equipment Co., Ltd. established, started full-premix surface combustion tech R&D.
2018
Beijing Century Aipusen Energy Tech relocated to Dezhou, Shandong, renamed Shandong Yongjie Thermal Energy Tech, focusing on full-premix turbulent steam generator R&D & production.
2020
Obtained B-class special equipment manufacturing license, ISO9001, ISO14001, ISO45001 certificates.
2024
Stellergy Energy-saving Boiler Co., Ltd. established, "Stellergy" brand created, focusing on steam generator production & sales.
2025
Shanghai Haodasen Electronics Co., Ltd. established, focusing on overseas users' sales and services.
International Certifications & Compliance
Our Full Certification Portfolio for the European Market Full Certification Portfolio
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EU Pressure Equipment Directive (PED) Verification
Issuing Body: ICR
Scope: Condensing Type Fuel Commercial Boilers
What it means: This third-party verification confirms that our technical documentation fully complies with the EU PED 2014/68/EU and harmonized standards, a mandatory requirement for market access.
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EU Machinery Directive (MD) Attestation
Issuing Body: UDEM
Scope: Tubular Steam Generators
What it means: This document certifies that our products meet the essential health and safety requirements of the Machinery Directive 2006/42/EC. It is the foundation for our official CE Declaration of Conformity.
Discover the advanced technology behind our efficiency and reliability.
ENGINEERED FOR SUPERIOR PERFORMANCE
Air Preheating System
- Utilizes an oversized, dense air filter vertically mounted on the furnace side.
- Preheats incoming combustion air, enhancing heat exchange efficiency and reducing natural gas consumption.
High-Grade Material Construction
- Cross-flow finned tubes made of GB/T-5310 12Cr1MoV6 material.
- Superior to standard boiler steel (GB/T-3087 20#), offering exceptional temperature and pressure resistance.
Automatic Monitoring & Blowdown
- Integrated automatic detection and blowdown system.
- Significantly reduces scaling risk in the furnace chamber, extending equipment service life.
Dual Frequency Conversion
- Both combustion and water supply systems feature intelligent frequency conversion control.
- Allows linear output adjustment from 10% to 100%.
- Minimum steam output of 100 kg/h without shutdown for stable pressure and maximum energy savings.
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Automotive & Metal Processing
- Applications: Workshop heating, parts cleaning, painting lines, metal treatment.
- How We Help: Deliver rapid, on-demand steam to reduce preheating downtime and ensure consistent process temperature.
- Representative Projects:
- Beijing Hyundai (Automotive Assembly Plant) – Provided steam solution for painting line pre-treatment.
- A Leading Heavy Machinery Manufacturer – Supplied high-pressure steam for parts cleaning and workshop heating.
- Specialized Steel Pipe Mill – Implemented system for consistent steam supply in metal treatment processes.
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Infrastructure & Project Sites
- Applications: Temporary heating for large-scale projects, concrete curing, on-site sanitation.
- How We Help: Provide portable, rapid-deployment steam solutions for critical construction phase needs.
- Representative Projects:
- National Rail Construction Group – Used for concrete curing and temporary camp heating on railway projects.
- Major Bridge & Highway Contractors – Deployed for on-site steam requirements.
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Food, Beverage & Agriculture
- Applications: Food cooking, sterilization, brewing, feed processing.
- How We Help: Supply clean, dry steam crucial for hygiene-sensitive processes, with energy-efficient operation.
- Representative Projects:
- National Food Processing Equipment Supplier (Luzhan/Rainbow) – Our steam generators are integrated into their sterilization equipment supplied to multiple food plants.
- Multiple Edible Oil & Brewery Facilities – Providing reliable steam for cooking and fermentation processes.
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Environmental Technology & Chemicals
- Applications: Heating for environmental equipment, water treatment, R&D labs, chemical processes.
- How We Help: Deliver precise and corrosion-resistant steam solutions for sensitive technical applications.
- Representative Projects:
- Water Treatment Solution Company – Provides steam for membrane cleaning and system heating.
- Advanced Materials (Titanium) Producer – Steam supply for specialized chemical processes.
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Textile & Commercial Laundry
- Applications: Dyeing, finishing, industrial laundering, hotel linen services.
- How We Help: Offer stable steam pressure and temperature for quality fabric handling, with low operating costs.
- Representative Projects:
- Major Commercial Laundry Systems Provider (Donlee) – Our units power laundry solutions for hotel chains and hospital central laundries.
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Institutional & Healthcare
- Applications: Campus/hospital heating, central laundries, sterilization, laboratory steam.
- How We Help: Ensure safe, reliable, and efficiently managed steam for critical service environments.
- Representative Projects:
- Nankai University & Nantong University – Central heating system steam supply.
- Shanghai Pharmaceutical School – Laboratory and sterilization steam.
AFTER-SALES SERVICE
- Professional Commissioning
We provide complete technical documentation and remote-guided commissioning support for all supplied equipment, ensuring correct startup and operational readiness through digital assistance. - Operations & Maintenance Training
We offer comprehensive remote training programs for your team, covering equipment performance, operational procedures, and maintenance best practices through digital platforms. - Dedicated Technical Support
Our expert support team provides immediate remote assistance with rapid response times. For situations requiring physical inspection, we coordinate with trusted local service partners to facilitate on-site support while maintaining single-point accountability. - Digital Maintenance Resources
Access our online knowledge base, troubleshooting guides, and maintenance tutorials for instant solutions and continuous operational support.
