WGL30–WGL40 compact dual-fuel gas/oil burners 70–550 kW

Country: Germany · Model: WGL30/1, WGL40/1

The compact WGL30–WGL40 dual-fuel burners of 70–550 kW burn gas or liquid fuel and switch to the standby fuel when the gas supply is interrupted. They are installed where heat supply must be guaranteed, i.e. in boiler rooms of public and industrial buildings, hospitals and food industry plants.

Types: WGL30/1 – 70–340 kW; WGL40/1 – 125–550 kW
Gas: natural gas E, LL, liquefied gas B/P; up to 20 vol. % hydrogen
Liquid fuel: heating oil EL and low-sulphur EL (DIN 51603-1), EL A Bio up to 20.9 % (option up to 30.9 %), paraffinic EL P (DIN/TS 51603-8)
Fuel changeover: including remotely via a fieldbus module

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Technical specifications

Types	WGL30/1 – 70–340 kW; WGL40/1 – 125–550 kW
Gas	natural gas E, LL, liquefied gas B/P; up to 20 vol. % hydrogen
Liquid fuel	heating oil EL and low-sulphur EL (DIN 51603-1), EL A Bio up to 20.9 % (option up to 30.9 %), paraffinic EL P (DIN/TS 51603-8)
Fuel changeover	including remotely via a fieldbus module
Fuel pump	with a separate motor, switched off during gas operation
Air damper	electronically controlled, closes during shutdown
Control	digital combustion manager, expansion modules, O2 trim (option)

Specifications are taken from the manufacturer’s technical documentation. Updated 11/06/2026.

Description

In normal operation the burner runs mainly on gas, and switching to liquid fuel, including so-called Green Fuels, can also be done remotely via a fieldbus module. The series belongs to the W burner family and adds fuel flexibility to it. The fuel pump has a separate motor and is switched off on gas, which protects the pump and reduces power consumption. The electronically controlled air damper closes during shutdown, so the furnace does not cool down. The new mixing system works at low gas connection pressure, so the gas train can have a smaller diameter. The air intake housing is sound-damped, and the combustion manager with an integrated connector console and coded numbered plugs simplifies installation and service. The digital manager delivers exactly the amount of heat the boiler requires and, through digital communication, allows the burner to be monitored, set up and diagnosed and to be included in the building automation system.

How to choose

The size is determined by the boiler output. For a boiler up to 125 kW only the WGL30/1 with a range of 70–340 kW is suitable, above 340 kW only the WGL40/1 at 125–550 kW, and between these values the power reserve decides. Expansion modules with analogue inputs and outputs, bus communication modules and O2 trim with an external module and probe can be ordered as options. If standby fuel is not needed, look at the gas WM-G monarch at 55–12 000 kW, and for boilers of 1100–17 000 kW the monobloc WKmono-G/GL 80.

Request a price and lead time

WGL30–WGL40 compact dual-fuel gas/oil burners 70–550 kW. We reply within one business day.

Or email office@usk.ua or call +38 (044) 339-50-20.

FAQ

Does the WGL burner run on gas with hydrogen?

Yes, for natural gas of groups E and LL and liquefied gas B/P a hydrogen share of up to 20 % by volume is permitted.

Which liquid fuel can be burned in WGL30/1 and WGL40/1?

Heating oil EL and low-sulphur EL per DIN 51603-1, EL A Bio with bio components up to 20.9 % (optionally up to 30.9 %) and paraffinic heating oil EL P per DIN/TS 51603-8.

Can WGL be switched from gas to liquid fuel remotely?

Yes, switching is done through a fieldbus module, and the same digital link is used for diagnostics and connection to building automation.

Why does the WGL burner have a separate fuel pump motor?

During gas operation the pump is switched off, so it does not wear running idle and does not use electricity.