Electric screed mixer-pump Tragen B250

Product overview
Floor screed mixer-transporter designed for construction professionals. Integrates a 270 L mixing vessel with pneumatic conveying to feed floor screeds, lightweight concrete and insulating aggregates on site. Manufactured by Bunker.

A brief history
Historically, mixing and moving screeds required separate equipment (mixers, wheelbarrows, cranes), leading to low productivity and heavy labour. For over twenty years Bunker has developed dedicated mixer-transporters to combine mixing and conveying, reducing labour and site time.

High productivity at low cost
The Tragen B250 E/EB is built for mobility and continuous operation with low running and maintenance costs. The EB version includes a loading skip and an optional scraping blade to improve loading and material flow. The machine complies with applicable safety and environmental rules.

Typical performance
When paired with a 4000 l/min compressor the unit can mix and convey approximately 30 m³ per working day up to 80 m vertically within a working radius of about 180 m (actual output depends on compressor air volume and material granulometry).

Applications

• Pure and bound expanded clay
• Normal and fine concrete (max grain size 16–20 mm)
• Lightweight concrete and sand
• Polystyrene, cork, fine gravel

Accessories

• Essential tool kit (supplied: hose, hose holder, discharge hopper, cleaning kit, manual, full case of tools)
• Screw coupling
• Timed lubrication system (optional)
• Scraping blade (optional)

Technical data

• Mixer motor: Electric three-phase 230/400V 50Hz — Power 5.5 kW
• Skip motor (B250 EB): Electric three-phase 230/400V 50Hz — Power 1.1 kW
• Vessel capacity: 270 L
• Skip capacity (EB): 270 L
• Air delivery: 2400–5000 L/min
• Working pressure: 7 bar
• Floor screed output: 3 m³/h (B250 E) — 3–4 m³/h (B250 EB)
• Max granulometry: 20 mm (with Ø100 piping)
• Conveying distance: horizontal up to 120 m — vertical up to 80 m
• Vessel outlet diameters: Ø 60 / 65 / 100
• Dimensions (L×W×H): 2750–2920 × 1300 × 1340 mm (varies by version)
• Weight: 700 kg (B250 E) — 880 kg (B250 EB)

Key specifications

• Versions: B250 E (mixer only) and B250 EB (mixer + skip)
• Power supply: 230/400V 50Hz
• Typical use: screeds, lightweight aggregates and concrete up to 20 mm