ASME S & U Stamp • CE PED • ISO9001:2015 Certified Heavy Industrial Manufacturing

Industrial Oil-Fired Boilers — Engineered Thermal Systems

Explore Dabonn’s high-efficiency oil-fired steam, pressurized hot water, and thermal fluid boilers (0.5 to 50 Ton/h). Calibrated for Light Diesel, Heavy Fuel Oil (HFO/Bunker C), Recycled Waste Oil, and Dual-Fuel combustion with measured thermal efficiency up to 98.2% and certified low-NOx flue emissions < 30mg/Nm³.

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Engineering Benchmark

≥ 98.2%

Max Thermal Efficiency

0.5-50 T/h

Output Capacity

3.82 MPa

Working Pressure (38 Bar)

< 30 mg

Low NOx FGR Tech

100% WET-BACK SHELL SIEMENS PLC AUTO EXW / FOB / CIF GLOBAL

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Showing 8 Product Lines • 28 Models Sized

tune Filter Engineering

Boiler Structural Architecture (4 Types)

Horizontal Fire Tube (WNS) 12 Double Drum Water Tube (SZS) 8 Pressurized Hot Water (CWNS) 5 Thermal Fluid Heater (YYW) 3

Fuel Combustion Media

Light Diesel (EN590 / No.2) 24 Heavy Fuel Oil (HFO / Bunker C) 16 Waste Oil / Pyrolysis / Biodiesel 6 Dual Fuel (Oil / Natural Gas) 18

Rated Capacity Envelope

0.5 – 2.0 Ton/h (0.35 - 1.4 MW) 2.0 – 6.0 Ton/h (1.4 - 4.2 MW) 6.0 – 15.0 Ton/h (4.2 - 10.5 MW) 15.0 – 35.0 Ton/h (10.5 - 24.5 MW) 40.0 – 50.0 Ton/h Heavy Utility

Design Pressure (Gauge)

0.7 – 1.0 MPa (7 – 10 bar) 1.25 – 1.6 MPa (Standard Industrial) 2.5 MPa (25 bar Medium-High) 3.82 MPa (High Pressure Superheated)

Global Compliance

ASME S/U CE-PED CU-TR (EAC) DOSH MOM

Best Seller ASME S • CE

Eff: 96.4% – 98.2%

Fire Tube Steam Generation

WNS Series Three-Pass Wet-Back Oil Fired Steam Boiler

Engineered with a 100% wet-back combustion chamber and corrugated furnace to eliminate rear tube-sheet thermal cracking. Compatible with Riello, Weishaupt, and Baltur burners.

Capacity: 1.0 – 20.0 Ton/h

Operating Pressure: 0.7 – 2.5 MPa (25 bar)

Standard Fuel: Light Diesel / HFO / Dual

Emissions: NOx < 30 mg/Nm³

Corrugated Wave Furnace Spirally Fluted Tubes Integrated Economizer

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Heavy Utility High Pressure

Eff: 95.8% – 97.5%

Water Tube High Steam Duty

SZS Series Double Drum D-Type Water Tube Oil Boiler

Designed for heavy petrochemical, textile, and paper milling installations demanding massive saturated or superheated steam with continuous 24/7 reliability.

Capacity: 10 – 50 Ton/h

Operating Pressure: 1.25 – 3.82 MPa (38 Bar)

Standard Fuel: Heavy Oil (HFO) / Bunker / Diesel

Emissions: NOx < 50 mg/Nm³

Membrane Water Wall D-Type Rapid Circulation Low Heat Inertia

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District Heating Low Maintenance

Eff: 95.5% – 97.0%

Hydronic Heating Systems

CWNS Atmospheric / Pressurized Oil Hot Water Boiler

High-capacity thermal water generation for municipal central heating, luxury hotels, hospital campuses, and mining camps with multi-stage loop flow balancing.

Thermal Rating: 0.7 – 14.0 MW (600k-12M kcal)

System Pressure: Atmospheric / 0.7 - 1.6 MPa

Water Outlet: 95/70°C or 115/70°C High Temp

Fuel Flexibility: Diesel / Light Oil / Dual

Anti-Thermal Shock Baffles Dual Safety Relief Valves Modulating PLC

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Plug & Play 48h Deployment

Turnkey Modular

Mobile Engineered Thermal Pack

Skid-Mounted & Containerized Oil Boiler Plant

Fully integrated mobile boilerhouse factory-assembled inside 20ft or 40ft ISO shipping containers. Pre-piped, pre-wired with water treatment and oil day tanks.

Capacity: 0.5 – 6.0 Ton/h

Pressure Class: 0.7 – 1.6 MPa (16 Bar)

Hookup Time: < 48 Hours to Steam

Standard Inclusions: Feed Tank + Softener + PLC

Weatherproof Acoustic Shell Explosion-Proof Lighting Rapid Relocation

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High Temp 350°C Low Pressure

Eff: 94.5% – 96.5%

Liquid Phase Heat Transfer

YYW Series Horizontal Thermal Fluid Heater (Oil-Fired)

Supplies process heat up to 350°C under low hydraulic pressure (0.8 MPa). Multi-layer circular coiled tubes ensure uniform film temperature, preventing thermal fluid degradation.

Heat Rating: 0.35 – 14.0 MW

Operating Temp: Up to 350°C Liquid

Design Pressure: 0.8 – 1.0 MPa

Target Industries: Textile, Asphalt, Resins

Triple Coiled Serpentine Expansion Tank Safety Interlock Zero Vapor Lock

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Eco Efficiency NOx < 30mg

Eff: 98.5% Net

Condensing Heat Recovery

WNS Condensing Ultra-Low NOx Diesel Steam Boiler

Features dual-stage ND-grade corrosion-resistant economizers and FGR (Flue Gas Recirculation) reducing exhaust temperature to < 65°C and maximizing latent heat recovery.

Capacity: 1.0 – 15.0 Ton/h

Operating Pressure: 1.0 – 2.0 MPa (20 Bar)

Exhaust Flue Temp: ≤ 65°C Latent Condensing

Environmental Tier: EU Class 3 Compliant

Flue Gas Recirculation (FGR) 09CrCuSb Acid Steel O2 Trim Automation

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Waste-to-Energy Multi-Viscosity

ROI Payback < 14 Mo

Alternative Fuel Engineering

Waste Oil & Tire Pyrolysis Oil Fired Industrial Boiler

Configured with specialized dual pre-heaters, air-assist atomization burners, and anti-clogging filters to safely combust high-viscosity recycled oil, tire oil, and biodiesel.

Capacity Range: 2.0 – 20.0 Ton/h

Operating Pressure: 1.0 – 2.5 MPa

Usable Fuels: Crankcase, Pyrolysis, Bio, Tallow

Burner Nozzle: Tungsten Carbide Hardened

Automatic Soot Blowing System Heavy Slag Resistant Chamber Dual In-Line Filter

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Superheated 450°C Turbine Drive

ASME Power Code

Cogeneration & Power Generation

SZS High-Pressure Superheated Steam Oil Boiler Series

Equipped with high-alloy convection superheater coils and spray attemperation loops for accurate steam temperature regulation, tailored for steam turbines and synthesis reactors.

Capacity: 6.0 – 35.0 Ton/h

Superheat Temp: 350°C – 450°C (Controlled)

Design Pressure: 2.5 – 3.82 MPa (38.2 bar)

Compliance: ASME Section I Power

Spray Desuperheater Included SA-213 T22 Alloy Superheater Complete Steam Header

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Engineering Sizing Tool

Can't find the exact model? We custom engineer systems up to 50 Ton/h.

Adjust your operating parameters to immediately identify recommended Dabonn boiler series, thermal power demand, and recommended auxiliary sizing.

verified ASME S Certified speed 24h P&ID Drawing support_agent Chief Engineer Review

Target Steam Load (Ton/h): 10 Ton/h (7.0 MW)

Operating Pressure (MPa): 1.25 MPa (12.5 Bar)

Steam Output State:

Primary Fuel Grade:

Engineered Sizing Recommendation:

Recommended: Dabonn SZS10-1.25-Y Heavy Duty Package

Lock In Sizing Proposal

Specifier's Selection Guide

Engineering Parameter Comparison Matrix

Download Engineering Matrix (.XLSX) download

Boiler Series	Internal Structure	Rated Capacity	Design Pressure	Net Thermal Eff.	Burner Compatibility	NOx Emissions	Delivery Mode
WNS Fire Tube Horizontal 3-Pass	100% Wet-back, Corrugated wave furnace, spirally finned smoke tubes	1.0 – 20 Ton/h	0.7 – 2.5 MPa	96.4% – 98.2%	Riello / Baltur / Weishaupt	< 30 mg/Nm³	Skid base packaged / Breakbulk
SZS Water Tube Double Drum D-Type	Complete membrane wall furnace, natural water loop circulation, convection banks	10 – 50 Ton/h	1.25 – 3.82 MPa	95.8% – 97.5%	Oilon / Weishaupt / Saacke	< 50 mg/Nm³	Modular sub-assemblies
CWNS Hot Water Pressurized Hydronic	Three-pass shell with balanced back-pressure water jacket and anti-shock deflector	0.7 – 14 MW	0.7 – 1.6 MPa	95.5% – 97.0%	Riello / Baltur / Unigas	< 60 mg/Nm³	Fully integrated skid package
YYW Thermal Fluid Helical Serpentine Coil	Multi-coil concentric continuous pipe, liquid phase forced circulation	0.35 – 14 MW	0.8 – 1.0 MPa	94.5% – 96.5%	Weishaupt / Riello / Oilon	< 80 mg/Nm³	Factory skid-mounted
Containerized Plant Pre-Packaged ISO Box	Turnkey WNS boiler + deaerator + softener + dosing unit inside 20/40ft container	0.5 – 6.0 Ton/h	0.7 – 1.6 MPa	96.0% – 98.0%	Riello / Baltur	< 30 mg/Nm³	Standard ISO Shipping Container

Engineering Reliability

Tier-1 Auxiliary Systems & Burner Integration

Dabonn heavy industrial boilers are configured exclusively with proven European and global auxiliary components ensuring uncompromised plant uptime.

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World-Class Burners

Official strategic OEM assembly with Riello (Italy), Baltur (Italy), Oilon (Finland), and Weishaupt (Germany) with modulating electronic cam linkages.

Turndown Up to 1:8

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Feedwater Conditioning

Full-flow automatic resin water softeners, chemical anti-scalant dosing pumps, and atmospheric or thermal deaerators preventing internal oxygen pitting.

Dissolved O2 ≤ 0.05 mg/L

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Economizers & Condensers

Spiral-finned 09CrCuSb alloy economizers and stainless steel latent condensers returning preheated feedwater to boiler drum at 85°C+.

+6% Thermal Gain

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Siemens Touch PLC Control

10-inch industrial touchscreen cabinet with Modbus / Profinet SCADA integration, automated blowdown control, and dual flame safety shutdown interlocks.

Cloud Remote Telemetry

Knowledge Center

Frequently Asked Engineering Questions

How do I determine whether my plant requires a WNS fire tube or SZS water tube boiler? expand_more

For capacities from 1.0 to 20 Ton/h with working pressures below 2.5 MPa (25 bar), the horizontal 3-pass WNS fire-tube boiler offers lower capital investment, simpler maintenance, and robust water volume buffering against fluctuating steam loads. For high-demand applications (10 to 50+ Ton/h) or pressures exceeding 2.5 MPa up to 3.82 MPa with superheated steam, the SZS double drum D-type water-tube boiler is required for rapid circulation, superior thermal shock resistance, and membrane water wall safety.

Can Dabonn industrial boilers handle high-sulfur Heavy Fuel Oil (HFO / Bunker C)? expand_more

Yes. When configured for HFO or Bunker C fuels, Dabonn includes electric and steam heating tracing manifolds to maintain fuel viscosity at 100°C – 130°C before atomization. Additionally, we engineer the economizers with 09CrCuSb (ND Steel) low-temperature dew-point corrosion-resistant alloys to fully withstand acidic sulfur dioxide condensation during low-load operation.

What auxiliary equipment is supplied in a standard Dabonn turnkey boiler island? expand_more

A standard complete Dabonn scope of supply includes: (1) Factory-mounted European burner (Riello/Weishaupt), (2) Dual multistage centrifugal boiler feedwater pumps (Grundfos/CNP), (3) Spiral finned flue gas economizer/condenser, (4) Automatic ion-exchange water softener, (5) Siemens touch PLC electrical cabinet with flame safety sensors, (6) Dual spring safety relief valves, (7) Blowdown valves, and (8) Interconnecting boiler instrumentation and valves.

What are the international shipping and export packaging certifications? expand_more

All pressure vessels are cleaned, nitrogen-purged, desiccated, and sealed with heavy-duty blind flanges prior to ocean transport. Boilers up to 6 Ton/h fit inside 40ft High Cube or Open Top containers. Larger models (10–50 Ton/h) are secured on heavy equipment flat racks or breakbulk shipping with reinforced lifting lugs, documented with international BV, SGS, or TUV inspection reports prior to port loading.