Recuperative burner WM monarch® series

premixforced draughtfuel oil

Product overview
The Weishaupt WM-series monarch® is a range of industrial burners for gas, oil and dual-fuel applications covering 55 to 12 000 kW depending on model and configuration. The series combines proven mechanical design with modern digital combustion management and options for low-emission operation.

Benefits

• Cost-effective configuration: modular burner design supports several combustion management systems to match performance and budget requirements.
• Wide applicability: adjustable flame geometry and mixing assemblies permit adaptation to diverse heat generators and thermal process systems.
• Service-friendly layout: fuel and air control components are clearly arranged and easily accessible for maintenance.
• Reduced noise: advanced fan unit and aerodynamic housing minimise acoustic emissions.
• Fuel flexibility: oil versions accept standard and paraffinic fuels and blended gas oil with biogenic admixtures; premixes and options support high biogenic content and, where approved, hydrogen blends up to 20 vol% in natural gas for many gas-fired models.

Applications

• Simple installation: plug-in electrical connections and burners that can hinge open to left or right ease mounting and service access.
• Integration ready: digital combustion management provides remote control, monitoring and fault diagnosis for building management and automation systems.
• Special executions: vertical versions and numerous custom variants available for specific industrial requirements.

Technology

• multiflam®: patented internal flue gas recirculation technique to cool the flame and reduce NOx formation in large combustion systems.
• Flue gas recirculation (4LN): integrated FGR versions meet stringent emissions limits and are optimised for gaseous fuels.
• Premix (PLN): premix technology achieves NOx values below 30 mg/kWh in applicable ranges, using separated gas and air feeds and surface-stabilised combustion.
• Combustion manager compatibility: mixing assembly adaptations with W‑FM200 / W‑FM50 digital managers ensure flame stability and reliable operation; VSD with frequency converters and speed control software available to improve electrical efficiency.

Capacity ranges (extracted tables)
Gas burners — ULN (Ultra-LowNOx)
Type | Rating (kW)
WM-G20/3 | 250 - 2 000
WM-G30/1 | 350 - 3 000

Gas burners — PLN (premix)
Type | Rating (kW)
WM-G10/2 | 85 - 700
WM-G10/3 | 130 - 1 050
WM-G10/4 | 130 - 1 150
WM-G20/2 | 180 - 1 700
WM-G20/3 | 250 - 2 500
WM-G20/4 | 300 - 3 000
WM-G30/1 | 400 - 4 000
WM-G30/2 | 550 - 5 000

Gas burners — 4LN (multiflam® FGR)
Type | Rating (kW)
WM-G20/2 | 200 - 1 450
WM-G20/3 | 350 - 2 000
WM-G30/1 | 400 - 3 800
WM-G30/2 | 500 - 5 000
WM-G30/3 | 500 - 5 000
WM-G50/0 | 1 000 - 7 500
WM-G50/1 | 1 000 - 8 300
WM-G50/2 | 1 000 - 11 000

Gas burners — 3LN (multiflam®)
Type | Rating (kW)
WM-G10/2 | 100 - 600
WM-G10/3 | 125 - 900
WM-G20/2 | 200 - 1 450
WM-G20/3 | 350 - 2 000
WM-G20/4 | 300 - 2 450
WM-G30/1 | 400 - 3 500
WM-G30/2 | 500 - 4 500
WM-G30/3 | 500 - 5 000
WM-G50/0 | 750 - 7 000
WM-G50/1 | 750 - 7 700
WM-G50/2 | 900 - 9 100
WM-G50/3 | 900 - 10 000
WM-G50/4 | 1 100 - 11 000

Gas burners — LowNOx
Type | Rating (kW)
WM-G10/1 | 55 - 350
WM-G10/2 | 75 - 630
WM-G10/3 | 125 - 900
WM-G10/4 | 125 - 1 100
WM-G20/2 | 250 - 1 600
WM-G20/3 | 300 - 2 000
WM-G30/1 | 350 - 2 800
WM-G30/2 | 400 - 3 800
WM-G30/3 | 600 - 5 400
WM-G30/4 | 800 - 6 000

Gas burners — Standard / NR
Type | Rating (kW)
WM-G10/1 | 55 - 405
WM-G10/2 | 65 - 630
WM-G10/3 | 100 - 1 000
WM-G10/4 | 110 - 1 250
WM-G20/2 | 150 - 2 100
WM-G20/3 | 350 - 2 600
WM-G30/1 | 350 - 3 100
WM-G30/2 | 450 - 4 100
WM-G30/3 | 600 - 5 700
WM-G30/4 | 600 - 6 200
WM-G50/1 | 800 - 8 000
WM-G50/2 | 1 000 - 11 000
WM-G50/3 | 1 000 - 12 000

Oil burners — 3LN (multiflam®)
Type | Rating (kW)
WM-L10/2 | 120 - 600
WM-L10/3 | 200 - 900
WM-L20/2 | 400 - 1 450
WM-L20/3 | 450 - 2 000
WM-L20/4 | 350 - 2 450
WM-L30/1 | 450 - 3 500
WM-L30/2 | 600 - 4 500
WM-L30/3 | 600 - 5 000
WM-L50/0 | 1 200 - 7 000
WM-L50/1 | 1 200 - 7 700
WM-L50/2 | 1 500 - 9 100
WM-L50/3 | 1 500 - 10 000

Oil burners — Standard
Type | Rating (kW)
WM-L10/1 | 75 - 405
WM-L10/2 | 150 - 600
WM-L10/3 | 250 - 800
WM-L10/4 | 325 - 1 120
WM-L20/1 | 400 - 1 400
WM-L20/2 | 600 - 2 100
WM-L20/3 | 800 - 2 600
WM-L30/1 | 800 - 3 100
WM-L30/2 | 900 - 4 100
WM-L30/3 | 1 100 - 5 700
WM-L50/1 | 1 200 - 8 000
WM-L50/2 | 1 750 - 11 000
WM-L50/3 | 1 750 - 12 000

Oil burners — Standard with oil preheating
Type | Rating (kW)
WM-S10/1 | 100 - 450
WM-S10/2 | 175 - 700
WM-S10/3 | 230 - 880
WM-S10/4 | 300 - 1 120
WM-S20/2 | 450 - 2 000
WM-S20/3 | 700 - 2 450
WM-S30/1 | 750 - 2 800
WM-S30/2 | 900 - 3 700
WM-S30/3 | 1 100 - 5 400
WM-S50/1 | 1 600 - 7 400
WM-S50/2 | 2 500 - 11 000
WM-S50/3 | 2 500 - 12 000

Dual-fuel burners — ULN (Ultra-LowNOx)
Type | Rating (kW)
WM-GL20/3 | 250 - 2 000
WM-GL30/1 | 450 - 3 000

Dual-fuel burners — 4LN (multiflam® FGR)
Type | Rating (kW)
WM-GL20/2 | 200 - 1 450
WM-GL20/3 | 350 - 2 000
WM-GL30/1 | 450 - 3 700
WM-GL30/2 | 500 - 4 500
WM-GL30/3 | 500 - 5 000
WM-GL50/0 | 1 000 - 7 500
WM-GL50/1 | 1 000 - 8 300
WM-GL50/2 | 1 100 - 11 000

Dual-fuel burners — 3LN (multiflam®)
Type | Rating (kW)
WM-GL10/2 | 100 - 600
WM-GL10/3 | 125 - 880
WM-GL20/2 | 200 - 1 450
WM-GL20/3 | 350 - 2 000
WM-GL20/4 | 300 - 2 450
WM-GL30/1 | 400 - 3 500
WM-GL30/2 | 500 - 4 500
WM-GL30/3 | 500 - 5 000
WM-GL50/0 | 750 - 7 000
WM-GL50/1 | 750 - 7 700
WM-GL50/2 | 900 - 9 100
WM-GL50/3 | 900 - 10 000

Dual-fuel burners — NR/Standard and Standard with oil preheating
Type | Rating (kW)
WM-GL10/1 | 65 - 405
WM-GL10/2 | 75 - 630
WM-GL10/3 | 110 - 1 000
WM-GL10/4 | 130 - 1 250
WM-GL20/2 | 150 - 2 000
WM-GL20/3 | 250 - 2 450
WM-GL30/1 | 350 - 3 100
WM-GL30/2 | 450 - 4 100
WM-GL30/3 | 600 - 5 700
WM-GL50/1 | 800 - 8 000
WM-GL50/2 | 1 000 - 11 000
WM-GL50/3 | 1 000 - 12 000
WM-GS20/2 | 150 - 1 700
WM-GS20/3 | 250 - 2 200
WM-GS30/1 | 350 - 3 100
WM-GS30/2 | 450 - 4 000
WM-GS30/3 | 600 - 5 600
WM-GS50/1 | 800 - 7 400
WM-GS50/2 | 1 000 - 11 000
WM-GS50/3 | 1 000 - 12 000

Technical specifications (summary)

• Series name: WM-series monarch®
• Capacity range: 55 to 12 000 kW (depending on model/version)
• Fuel types: Gas, oil, dual-fuel; support for paraffinic oils, blended gas oils with biogenic admixture and FAME per EN 14214 in applicable oil versions
• Hydrogen compatibility: blends up to 20 vol% H2 in natural gas possible for many gas-fired models (individual approval may be required)
• Emission technologies: multiflam® (internal FGR), 4LN versions, Premix PLN for NOx < 30 mg/kWh in applicable ranges
• Combustion management: compatible with W-FM200 / W-FM50 digital managers; supports remote monitoring and bus interfaces
• Installation: plug electrical connections; burners hinge left/right; external air inlet variants and optional electromagnetic clutch for inlet orientation
• Options: frequency converter for VSD, speed control software, special executions including vertical designs