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  • WNS
  • WNS
  • WNS
  • WNS

WNS Series oil Condensing Steam Boiler

  • Capacity/Hot Power 0.5-20t/h
  • Pressure 0.7Mpa-1.6Mpa | 7bar-16bar
  • Fuel Natural gas, city gas, LNG, light oil, heavy oil, diesel oil, etc.
  • Application Textile industries, food industries, rubber industries, paper industries, etc
  • Certification ISO, GSG, CE, BV
  • Thermal efficiency 105% with condenser and economizer

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 WNS series natural gas oil condensing steam boiler takes the advantage of high efficiency condenser and economizer, to absorb the sensible heat in the high temperature flue gas and the latent heat released from the vapor condensation, to improve the thermal efficiency.

WNS Series Gas Oil Condensing Steam Boiler Flow Chart
WNS series condensing gas oil fired steam boiler flow chart

How the WNS natural gas oil condensing steam boiler works?
Natural gas fuel usually contains a lot of hydrogen, which produce a large amount of water vapor . Burning per 1 Nm3 natural gas can produce 1.71 kg water vapor, latent heat of the vaporization is about 4000KJ, occupying about 10% low catorific value of natural gas. When the exhaust gas temperature is too high, water vapor condense and release heat, flows follow the flue gas and cause the waste of heat. Meanwhile, high temperature flue gas also takes a lot of sensible heat, big loss of flue emission. While installed with condenser can overcome these disadvantage and save energy, improve the thermal efficiency.

Characteristic of WNS natural gas oil condensing steam boiler
1. Equipped with condensator and economizer, the thermal efficiency can reach 105%.
2. High quality of condenser, using the stainless steel, avoid low temperature corrosion, long working perid.
3. Condenser is installed on the top of the boiler, do not cover extra space, condensation water on the conduction surface can also flow naturally.
4. Large heating area, warm up and pressure boost fast, easy operation. 
5. Adopt the wet back structure and corrugated furnace, greatly improve the heating area and the strength.
6. Equipped with high quality and high performance burner, ensure safe and reliable combustion.
7. The controller dopts Siemens/Delixi electric conponents, high degree of automation on water temperature and temperature, etc.
8. Small size, save the capital investment.


Model Rated evaporation capacity (t/h) Rated working pressure (Mpa) Rated steam temperature (℃) Feed water temperature (℃) Thermal efficiency (%)
WNS0.5-0.7/1.0/1.25-YQ 0.5 0.7/1.0/1.25 170/184/194 20 98
WNS1-0.7/1.0/1.25-YQ 1 0.7/1.0/1.25 170/184/194 20
WNS2-1.0/1.25/1.6-YQ 2 1.0/1.25/1.6 184/194/204 20
WNS3-1.0/1.25/1.6-YQ 3 1.0/1.25/1.6 184/194/204 20
WNS4-1.0/1.25/1.6-YQ 4 1.0/1.25/1.6 184/194/204 20
WNS5-1.0/1.25/1.6-YQ 5 1.0/1.25/1.6 184/194/204 20
WNS6-1.0/1.25/1.6-YQ 6 1.0/1.25/1.6 184/194/204 20
WNS8-1.25/1.6-YQ 8 1.25/1.6 194/204 20
WNS10-1.25/1.6-YQ 10 1.25/1.6 194/204 20
WNS12-1.25/1.6-YQ 12 1.25/1.6 194/204 20
WNS15-1.25/1.6-YQ 15 1.25/1.6 194/204 20
WNS20-1.25/1.6-YQ 20 1.25/1.6 194/204 20
Note: Parameter is for reference only, if any changes should follow the factory technical data.
Transaction Process
Customer Inquiry -- Offer Professional Consulting Service -- Place Order -- Customize Boiler Based on Customers’ needs --Production-manufacturing -- Payment -- Impeccable After Sale Service (installation and debugging, periodic maintenance, etc.)

Offered Technical Documentations
Installment and Operation Instruction
Quality Certificate
Inspection Certificate of Boiler quality
General Drawing of Boiler
Foundation Drawing
Boiler Body Drawing
Boiler Room Design Drawing
Drawing of Valves, Instruments and Accessories

Company Strength
Sitong boiler is a national approved and designated enterprise, with design and manufacture license permits of Class A boiler and D1, D2 pressure vessel. The company has passed ISO 9001 international quality system certification, and gained the international certificates of CE, SGS, and BV, etc. The boiler products are exported to more than 60 countries. The factory covers an area of 120 thousands㎡, equipped with plenty of international advanced manufacture equipment, such as CNC cutting machine, automatic submerged arc welding machine, X-ray detection machine, etc.
company strength of Sitong Boiler


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