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  • CWNS
  • CWNS
  • CWNS
  • CWNS

CWNS Series Gas Oil Hot Water Boiler

  • Capacity/Hot Power 0.35MW~14MW
  • Pressure Normal Pressure
  • Fuel Gas, Heavy/Light oil, Diesel oil, Natural gas
  • Application Textile industries, food industries, rubber industries, paper industries, etc
  • Certificate ISO, GSG, CE, BV

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CWNS series biler is a horizontal three pass packaged fire tube hot water boiler, and working under atmospheric pressure. It adopts the wet back structure, the high temperature smoke through the second pass and thrid pass smoke tubes, and then discharged into atmosphere by chimney. The hot water is equipped with the world brand burner and advnaced high-tech automatic controller, has the protection function on water temperature, over-temperature and over-pressure. 

Sitong CWNS series oil gas fired hot water boiler has the characteristics of compact structure, safe and reliable, convenient operatioin, fas installation, low pollution, low noise, and high efficiency (90%), based on these feature, this series hot water boiler is widely used for enterprise, hotel, hospital, civil architecture, office building, and swimming pool, etc.

Protection Device
1. Monitoring of water level
    Equipped with water level electronic detector to control the water level.
2. Setting time
    Time can be setted based on user's requirement.
3. Electric leakage protection
    When there is a electric leakage, the control system will cut off power automatically.
4. Water shortage protection
    When the boiler is lack of water, the control system will turn off burner and alarm.
5. Power abnormal protection
    When the power is abnormal, the boiler will shut down immediately.
6. Over pressure protection
    When the pressure is higher than the setting point, the burner will stop working and alarm.
7. Intergrated gas manifolds and protection system
    Include filter, regulator valve, solenoid valves, and safety valves etc, to ensure safe operation.
8. Flue gas monitoring device
    Automatically monitor exhaust gas temperature, know the combustion condition conveniently.


Model Rated Power (MW) Supply water temperature (℃) Return water temperature (℃) Fuel Consumption Efficiency (%)
Light oil (Kg/h) City gas (Nm³/h)
CWNS0.35-85/65-Y(Q) 0.35 95 20/70 32.5 83.6 90
CWNS0.48-85/65-Y(Q) 0.48 95 20/70 44.5 114.7
CWNS0.58-85/65-Y(Q) 0.58 95 20/70 53.8 138.6
CWNS0.7-85/65-Y(Q) 0.7 95 20/70 64.9 167.2
CWNS1.05-85/65-Y(Q) 1.05 95 20/70 97.4 250.8
CWNS1.4-85/65-Y(Q) 1.4 95 20/70 129.9 334.4
CWNS1.75-85/65-Y(Q) 1.75 95 20/70 162.4 418.1
CWNS2.1-85/65-Y(Q) 2.1 95 20/70 194.8 501.7
Note: Parameter is for reference only, we can design the boilers based on customers’ needs.
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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