Raumaustragung-Hackgut Eco-RA | Hargassner

Wood chip heating

ECO fuel extraction system

Energy-saving and cost-cutting

ECO fuel extraction system - robust and reliable

Thanks to a low drive output of just 0.18 kW (0.30–0.38 kW for 70–330 kW boilers) and a robust, high-efficiency spur gear, the fuel extraction system saves a huge amount of energy and therefore lowers electricity costs. You can save as much as 67% in electricity costs compared to those for conventional fuel extraction systems. With the excellent gear efficiency of over 90%, it clearly outperforms conventional worm gears. The new modular design ensures that the auger, along with its trough and removable cover, is easy to use.

ECO fuel extraction system

Cross section & specifics

Detailbeschreibung im Querschnitt einer Eco-Raumaustragung | Hargassner

1 – Bicameral rotary valve in Z-form
2 – Ball coupling
3 – Breaker box
4 – FE system extensions (modular design)
5 – Special spring blade layout
6 – Effective wood chip inlet bracket
7 – Extraction auger and shaft

8 – No-load disc
9 – Eco fuel extraction gear unit (spur gear)
10 – Stainless steel stoker auger (and pipe) with STM temperature monitoring
11 – Drive motor for the stoker auger and rotary valve
12 – Drive motor for the extraction auger and agitator
13 – Safety cover with a reverse function
14 – Floor agitator with spring blades

Worm gear

friction loss
low efficiency

Spur gear

low friction loss
high efficiency

Bicameral rotary valve in Z-form

Chamber depth 18 cm / 22 cm
100% burn-back protection guaranteed
For long pieces of wood
Easy to replace
Saves a lot of effort
Has hardened cutting edges

Modular design

Planning flexibility
Auger extensions of 300 – 2000 mm
Easy to transport and install
Quicker and cheaper to maintain
Individual auger parts can be replaced

Eco fuel extraction gear unit

Maximum efficiency
Energy-saving and highly efficient
Durable

Leerlaufscheibe mit Federn für Hargassner Raumaustragung 4,5 und 5 Meter

Hargassner no-load disc

Effort required halved
Disc remains still until the spring blades are retracted under the disc
No hollow spaces created
For extraction systems with Ø 4.5 m & 5 m

Querschnittbild Schacht-Schnecke für Hackgut bei Hargassner Eco-Raumaustragung

New auger and shaft

Generously dimensioned
3 shaft sizes
140 mm / 180 mm / 260 mm
Optimized for boiler type
No fuel jams
Suitable for wood chips/pellets

Querschnittbild vom Hackgut-Abstreifwinkel zum optimalen Materialtransport | Hargassner

Wood chip inlet bracket

Optimum fuel supply
Ideal amount of fuel in the auger shaft
Max. fuel storage room emptying
Less effort required and less wear and tear

Raumaustragung-Hackgut Eco-RA 400 mit 3 Federarmen Draufsicht | Hargassner

3-blade system

Special spring blade layout upt to Ø 4 m
Power-saving gear ratio 1:16
Shaft 140 mm = Eco-HK 20–120
Shaft 180 mm = Eco-HK 130–330
& Magno UF/VR 250–400

Raumaustragung-Hackgut Eco-RA 450 mit 4 Federarmen Draufsicht | Hargassner

4-blade system

Special spring blade layout up to Ø 4,5 – 5 m
Hargassner no load disc
Power-saving gear ratio 1:25
Shaft 140 mm = Eco-HK 20–120
Shaft 180 mm = Eco-HK 130–330
& Magno UF/VR 250–400

Raumaustragung-Hackgut Eco-RA 550 mit 3 Knickfederarmen Draufsicht | Hargassner

3-blade hinged arms

Ø of 5.5 & 6 m
Power-saving gear ratio 1:25
Shaft 260 mm
= Magno UF/VR/SR 450–1400

Find the right fuel extraction system for your biomass boiler

Matching Hargassner spring blade systems to possible wood chip heating models and shaft sizes

Spring Blade Layout	FE-Type	Eco-HK 20–120	Eco-HK 130–330	Magno UF/VR 250–400	Magno UF/VR/SR 450–1400
Fuel Extraction System 3-blade system Shaft 140 / 180	200 , 250 , 350 , 300 , 400	✓ / –	– / ✓	– / ✓	– / –
Fuel Extraction System 4-blade system & no-load disc Shaft 140 / 180	450 , 500	✓ / –	– / ✓	– / ✓	– / –
Fuel Extraction System 3-blade hinged arms Shaft 140 / 180	550 , 600	✓ / –	– / ✓	– / ✓	– / –
Fuel Extraction System 3-blade hinged arms Shaft 260	450 , 500 , 550 , 600	–	–	–	✓