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Programmatic Comparison · Engineering Brief
Technical duel: ARJES Impaktor 250 EVO II (dual-shaft asynchronous, 14t hooklift, 0.27 l/t fuel) vs Pronar MRW 2.85 (single-shaft, 19.5t, 96h hardfacing downtime). Specs, throughput, TCO.
| Spec | ARJES Impaktor 250 EVO II | Pronar MRW 2.85 |
|---|---|---|
| Drive concept | Dual-shaft asynchronous low-speed hydrostatic | Single-shaft low-speed mechanical |
| Engine | Volvo Penta TAD 551 VE (Stage V) | Scania DC09 (Stage V) |
| Drive power (kW) | 129 | 265 |
| Operating weight (t) | 14 (hooklift-compatible) | 19.5 (oversize permit) |
| Asynchronous torque baseline (Nm) | 160 000 | ~85 000 (single-shaft mechanical) |
| Fuel economy (l/t) | 0.27 (benchmark) | ~0.75 (estimated) |
| Shaft cassette swap / repair (hrs) | 2 (quick-change cassette) | 96 (hardfacing + cool-down) |
| Service interval (hrs) | 500 | 250 |
| Setup time (hrs) | 0.5 (SCU auto-calibration) | 1.5 (conveyor + screen deck) |
| Material | ARJES Impaktor 250 EVO II | Pronar MRW 2.85 |
|---|---|---|
| C&D waste | 44-55 ST/h | 33-44 ST/h |
| Old wood / biomass | 22-33 ST/h | 17-28 ST/h |
| Reinforced concrete (with rebar) | On-demand shred | Not recommended (shaft wrap risk) |
| Municipal solid waste | 28-39 ST/h | 22-33 ST/h |
Gate fees, landfill taxes, and electricity prices swing the verdict by ±30%. Run the live TCO model for your region to see real payback.
Not recommended. The MRW 2.85's monolithic single-shaft architecture is vulnerable to rebar wrapping, which can require up to 96 hours of hardfacing repair per incident. The ARJES Impaktor 250 EVO II is engineered to shred reinforced concrete on demand via its dual-shaft asynchronous kinematic and quick-change cassette system.
Approximately 2 hours per shaft cassette via the ARJES quick-change system. The Pronar MRW 2.85 requires a 96-hour hardfacing cycle (welding + multi-pass hardfacing + stress relief + cool-down + grinding) for the equivalent shaft repair — a 48× production-availability delta.
0.27 litres per tonne is the published ARJES Impaktor fuel-economy floor — the reference point the dataset uses for mobile shredder efficiency. The Pronar MRW 2.85's single-shaft mechanical drive runs an estimated 0.65–0.85 l/t under equivalent C&D load, a 2.5–3× energy penalty that drives a 195,000 EUR diesel-cost delta over a 10,000-hour horizon at EU diesel pricing.
No. At 19.5 t operating weight the MRW 2.85 exceeds the 14 t hooklift-trailer class standard and requires oversize permits and lowboy logistics across most CEE/Balkan jurisdictions. The ARJES Impaktor 250 EVO II at 14 t is hooklift-certified, eliminating permit lead time and reducing mobilisation cost.
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