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20ton diesel steam boiler
2 ton gas fired steam boiler
6 ton natural gas steam boiler
2.8mw gas fired hot water boiler
20ton diesel steam boiler
2 ton gas fired steam boiler
6 ton natural gas steam boiler
2.8mw gas fired hot water boiler

WNS Oil / Gas Fired Boiler

Wet back boiler | Diesel/LPG gas boiler | Horizontal fire tube boiler

WNS oil/gas fired boiler is the Automatic Horizontal Fire Tube Boiler. Adopts three pass wet-back structure, larger corugated furmace, thread smoke tube with unique expansion welding technique. Equipped with international first-level brand burners, strong output, 25 years lifetime.

Output: steam/hot water
Capacity: 0.2 to 40 Ton/h, 120 to 28,000kw
Horsepower 10hp to 2500hp
Pressure 0-3.8Mpa, 0-38bar
Applied Industry: food&beverage, dairy, feed, textile, paper, chemical, package, refinery, pharm, building material, hotel etc


Oil gas fired boiler is an environmentally friendly boiler. It has won most of the market with its advantages of low emission, long life and high degree of automation.

Yuanda Boiler fabricating fire tube oil gas boiler, vertical(small) oil gas boiler, oil gas water-tube package boiler.

gas/oil fired boiler

Yuanda devoted to industrial boilers since 1956. With ASME CE EAC DOSH GOST CRN quality certificate, exported to all over the world.

WNS Fire Tube Oil Gas Boiler

●3 pass wet-back structure, larger corugated furmace, thread smoke tube with unique expansion welding.

●Equipped with international first-level brand burner & accessories. Automatic operation of the burner ignition, flameout, big/small fire switch.

●PLC automatic control, interlock system for burner, water tank, pressure, flame.

●Energy saving device, such condenser, preheater, condensate water recovery etc.

Dosing device, TDS system optional.

fire tube boiler, gas oil boiler

Features & Advantages

High Security, 100% Safe Operation

①Five stages water level check, anti-dry heating system;

②Four stages pressure protection;

③Explosion-proof door with fire viewer;

④Over smoke temperature alarm.

98.6% High Efficiency, Save Fuel and Operation Cost

①Large corrugated furnace, patent design three pass smoke tubes;

②Steam-water separator, ensure high steam quality with wetness below 1%;

③Double 12mm thickness aluminum silicate insulation layer;

④Finned tube design economizer with aluminum silicate insulation, greatly reducing heat loss.

Long Using Life and Convenient for Maintenance

①Wet-back reverse flame chamber;

②Solid round steel tension rod design;

③Rapid solidification and high-strength refractory building materials;

④Double opening-door at front and back.

Skid-mounted/Container Boiler, No Need Installation

The entire boiler system, including all necessary auxiliaries are pre-installed on the skid, and commissioned by the manufacturer, no need installed on-site, can put into use directly.gas oil fired steam boiler projects

Including boiler body, burner, control cabinet, water softner, water tank, chimney, steam header,instrument valves, pumps, condenser, deaerator.

Vertical(small) Oil Gas Boiler

LHS LSS Small gas/diesel boiler, vertical boiler, gas/diesel steam generator and hot water generator.

Suitable for 0-2000kg, 0-1400kw, 0-150hp.

small gas oil boiler, gas oil boiler vertical

Water Tube Oil Gas Boiler

SZS water tube steam and hot water boiler, 5-40 ton/h, water membrane wall design, high efficiency 98%, larger combustion furnace.
Suitable for superheated steam production.

water tube gas oil steam and hot water boiler

About Our Company

■ Founded in 1956, a quality supplier assessed, certified and inspected by SGS Group

■ CE ASME DOSH EAC GOST TUV BUV ISO boiler certificates

■ More than 17 years of export experience, gold medal supplier, payment and delivery guaranteed

■ Integrating research&development production and sales

■ Support video/VR or third party factory inspection

■ Best seller in 108 countries, more than 100,000 customers

Our Service

Pre-sale Service:

1. Design一We help customer to choose the best boiler model according to the different requirements of different industries.
2. Drawing and files一Supply quality certificates, factory-inspect, fuel consumption calculation, cost analysis, foundation drawings, layout drawings, boiler room drawings nased on your needs, etc.
3. Technical Solution一Design completed boiler solution with installation materials for your company.
4. Competitive Price一As one boiler factory, we have lowest price and high quality.

After-sale Service:

1. Provide a full range of boiler and original spare parts.
2. Overseas engineers installation and commissioning service is available.
3. Training in site, to ensure safe operation.
4. 24 hours online, quick respond.
5. Free maintenance and repair for one year and lifetime service.

yuanda boiler corporation ltd

Quality Control Method

Steel element test→Steel rust cleaningWelding electrodes drying processAutomatic welding, argon arc welding, expansion welding etc. methodsNDT(Nondestructive Testing) including X-ray Test, Ultrasonic Test, Magnetic particle TestHydraulic pressure test.

FAQ of WNS Boiler

1. How much fuel does the boiler use per hour?

Take WNS 1 ton boiler as an example, the gas consumption per hour is 70m³, light diesel oil is 64kg.

2. Worried about the installation?

①We have skid mounted boiler, free of installation; ②We can send engineers to install boiler.

3. Don't have enough space in our factory?

We have vertical gas/diesel boiler, small footprint.

4. Do you have agent here?

We have agents and partners in some countries, will check list for you.


Gas/oil Steam Boiler
Gas/oil Hot Water Boiler
Model Capacity
steam temperature
Feed water temperature
Fuel consumption
Light diesel oil(kg/h) Natural gas(Nm3/h)
WNS 0.5 0.5 35 0.4 to 3.82mpa 130450 20/105 32.5 35.7
WNS 1 1 71 0.4 to 3.82mpa 130450 20/105 64.6 70.1
WNS1.5 1.5 120 0.4 to 3.82mpa 130450 20/105 96.8 105.2
WNS 2 2 150 0.4 to 3.82mpa 130450 20/105 129.3 140.3
WNS 3 3 200 0.4 to 3.82mpa 130450 20/105 192.9 212.1
WNS 4 4 300 0.4 to 3.82mpa 130450 20/105 258.2 283.4
WNS 5 5 350 0.4 to 3.82mpa 130450 20/105 323.5 354.7
WNS 6 6 425 0.4 to 3.82mpa 130450 20/105 388.6 424.2
WNS 8 8 550 0.4 to 3.82mpa 130450 20/105 514.6 566.3
WNS 10 10 700 0.4 to 3.82mpa 130450 20/105 641.7 707.8
WNS 12 12 850 0.4 to 3.82mpa 130450 20/105 768.9 849.3
WNS 15 15 1050 0.4 to 3.82mpa 130450 20/105 960.1 1061.7
WNS 20 20 1400 0.4 to 3.82mpa 130450 20/105 1276.2 1415.8
Note: Standard boiler parameter is for your reference, should follow the actual technical data according customer needs & engineer design.
Model Rated heating capacity
Rated working pressure
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.

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Skid-mounted Boiler

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Vertical Oil / Gas Boiler

More suitable for: small space, low budget, OR steam demand of 100 to 2000 kg/h, 120 to 1400 kw/h

SZS Water Tube Boiler

SZS water tube packaged gas/oil boiler, larger furnace with light membrane wall, high efficiency

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