Alrena B.V. Distribution Technology

For very precise slurry distribution in your slurry distributor.

Alrena originated from the development department of Bomech B.V. (www.bomech.org). With 30 years of experience in slurry and trailing shoe technology, the Alrena precision macerators have a solid basis for a high-quality product.

The precision macerator of Alrena is a slurry distributor which will distribute the slurry with enormous precision and can be used on any type of slurry distributor machine. The unique controlled and guaranteed airflow ensures a very constant flow of slurry, making the spreading of the slurry over the entire width of your slurry spreader very precise. The air is automatically sucked into the Alrena precision macerator through four air hoses and guided through a hollow drive shaft to the hollow rotor. In this rotor, the air is distributed to the chambers in which the knives are loosely mounted. As a result, after each time slurry is flowing in the hose, air will be immediately sent along, so there will never be a vacuum. This technique ensures that the distribution is ±98% accurate. An unprecedented score in the market of slurry distributors.

The unique cutting system with rotating knives minimizes wear in the Alrena precision macerator. Because the knives are mounted diagonally above the holes of the internal slurry screen, the round knives will automatically turn due to the resistance of the fibres in the slurry. As a result, every cutting movement will be carried out with a ‘new’ piece of knife, so that the wear is very low. Due to the rotating movement, the blades are self-sharpening and have a long life span. The precision macerators of Alrena can be equipped with different rotors with 4 or 6 knives on each side.

The design of the Alrena precision macerator is very simple, so replacing parts can be done quickly and easily. When a slurry distributor machine has to spread slurry in very different quantities, the rotor and the slurry screens that are mounted internally in the Alrena precision macerator can be replaced in a very short time. Only a few fasteners need to be unscrewed after which the entire interior can be changed. No external aids are required. By mounting the lid, the tension is applied to the spiral springs, which internally supply the tension to the knives.

The Alrena precision macerator is available in two types, the ‘standard’ Alrena precision macerator and the Alrena horizontal precision macerator.