WNS Series Oil/Gas Fired Hot Water Boiler

Zhongding CWNS Series Oil/Gas Fired Hot Water Boiler series boiler is horizontal three return fire tube hot water boiler. It is equipped with high efficiency burner and advanced techniques. The burning control, water feed, and program run, etc, are full automatic.this boiler is safe and reliable, and also has the advantage of compact structure, simple operation, easy installation, high efficiency, less pollution and noise, etc.

Rated Capacity:



<2.5 Mpa




Natural gas, LPG, Diesel, Heavy Oil, etc.

Boilers Structure

WNS Series Oil/Gas Fired Hot Water Boiler

1. Adopts horizontal type three pass structure and large diameter corrugated furnace, has large combustion space, could absorb the thermal expansion effectively.

2. The spirally corrugated tube is used to strength the disturbance of flue gas, the heat transfer efficiency is 2 times of common tube.

3. The boiler shell use aluminium silicate board for heat preservation, has low heat loss, increase the boiler thermal efficiency.

4. Equipped with multiple safety protection devices, such as pressure controller, pressure transmitter, water level alarm, safety valve, etc. To ensure the boiler safe operation.

Auxiliary equipment

Advanced Burner

Advanced Burner

Usual burner brand: Italy Baltur, Ecoflam, Riello, Unigas Germany Weishaupt, Finland Oilon. It is general mechanical proportion adjustment, two-stage fire.

Control System

Control System

We adopt Siemens PLC and Schneider electrical components. can realize automatic interlock control to ensure boiler safe operate.



We adopts aluminum alloy fin tubes, its heating transfer area is 2-10 times larger than the bare tube, has a good heating transfer and mechanical property.



We adopts the stainless vertical pump with low noise, stainless impeller and pump body.

Steam header

Steam header

Standard configuration: one inlet, three outlets, equipped with pressure gauge and thermometer. It can be designed according to customers' requirement.

Water softener

Water softener

It is fully automatic and free debugging. We adopts PE material for salt tank body, it has hard texture and it is easy to move, anti-shock, and no leakage.


Zhongding Boiler pay more attention to the boiler quality from raw material to producing process.

boiler quality
we choose domestic well-known manufacturer who can provide component report of raw material, to ensure the raw material is qualified. After the completion of raw material procurement, there are specialized technicians in our factory to make sampling chemical composition analysis and physical performance analysis, and we can also provide raw materials inspection report.
We adopt numerical control cutting, which has the advantage of high precision, neat cutting surface, nice appearance and high material utilization.
Boiler manufacturing
Boiler production
We adopt submerged arc fully automatic welding. When each welding process is done, the 100% X-ray inspection will be arranged for every welding seam, which can prevent the defective parts from flowing into the next process.


Model CWNS0.35-85/65-Y(Q) CWNS0.48-85/65-Y(Q) CWNS0.58-85/65-Y(Q) CWNS0.7-85/65-Y(Q) CWNS1.05-
CWNS1.4-85/65-Y(Q) CWNS1.75-85/65-Y(Q) CWNS2.1-85/65-Y(Q)
Rated power(MW) 0.35 0.48 0.58 0.7 1.05 1.4 1.75 2.1
Working pressure(MW) Normal Pressure
Supply water temperature(℃) 85
Return water temperature(℃) 65
Efficiency(%) 90
Water capacity(L) 420 630 900 1050 1560 2300 2700 3700
Out let(mm) 65 65 80 80 100 100 125 125
In let(mm) 65 65 80 80 100 100 125 125
Drain valve(mm) 40 40 40 50 50 50 50 50
Power consumption(Kw/h) 1.1 2.3 2.3 2.3 4 4.7 6.4 7.5
Chimney(mm) 200 250 250 250 300 350 460 500
Size Length(mm) 1960 2480 2670 2670 2930 3300 3530 3800
  Width(mm) 920 1020 1120 1120 1360 1470 1580 1680
  Height(mm) 1255 1435 1485 1485 1760 1890 2010 2110
Size of base(mm) 1900×800 2150×800 2350×900 2350×1000 2550×1000 2750×1100 3080×1200 3450×1200
Transport weight(Kg/h) 1280 1550 1900 2100 2900 3750 3950 4950
Fuel Light oil(Kg/h) 32.5 44.5 53.8 64.9 97.4 129.9 162.4 194.8
  L·N·G(Nm³/H) 39.3 54 65.2 78.7 118 157.4 196.7 236
  C·G(Nm³/H) 83.6 114.7 138.6 167.2 250.8 334.4 418.1 501.7
Note:1.data and pictures in watch provide the reference only, the product takes real object as to follow,forgiving not to go to another circula such as the alteration because of remodel.
2.prepare to make,reserve,and design of the boiler building,pleased contact to confirm before relevant data.


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