Although Börger is best known for its rotary lobe pumps, an equally important product line is its macerating units, which are divided into three separate categories – Multicrusher, Multichopper and Rotorrake. In the field of wastewater management and working with liquids containing solids, Börger has established itself as a leading innovator, offering not only pumps but also solids crushing equipment.

 These equipment, i.e. Multicrusher, Multichopper and Rotorrake, have become irreplaceable tools for industrial companies looking for efficient and reliable solutions for crushing solid particles that need to be pumped.

Multicrusher operating principle

The Multicrusher is the flagship product of the Börger macerating units’ series. It is designed to process a wide range of solid particles. Its robust design and powerful cutting mechanism make it suitable for use in wastewater management plants, industrial processes and similar applications. The machine uses a two-shaft system that ensures thorough crushing and solids separation.

The Multicrusher reliably chops coarse material such as fibers, wood pieces, plastics, membranes, textiles and many more and ensures that downstream machines and pumps operate smoothly. The cutting blades are made of hardened steel, which increases durability and extends the service life of the machine. In addition, the machine has a compact design, making it easy to integrate into existing systems, for example use together with mobile Börger pumps by mounting the pump and crusher on the same trailer.

The Multicrusher, like other Börger products, is characterized by its simple design, which ensures reliability, durability and easy maintenance.

1.  Quick-release cover. Just unscrew 4 nuts (this can be done by hand, without any tools) and you already have access to the main parts of the Multichrusher located inside the crusher.

1. Axial casing protection. The medium (that might be aggressive) flows through the interior of the casing and is fitted with an axial protective cover.
2. Blades. The Multicrusher is designed so that you can choose which way the pumped medium flows by inserting the individual blade disks and defining the direction of rotation of the shafts. Various blade widths and cutting profiles determine the final cutting yield. The central fastening screws hold all the blade disks in position. Blades are one of the parts that wear out the most and require replacement, so it is important that such work is carried out by loosening just a few nuts, without any additional equipment.
3. Shaft seals. Simply ideal. The space here allows the proven mechanical seal to be fitted without having to fully dismantle other components. No pipeline dismantling, no drive dismantling.
4. Block casing. The casing is a single-piece block casing made of gray cast iron or stainless steel.
5. Quench and control chamber. Added control and lubrication fluid have both a monitoring and lubricating function. Leakages in the upper overflow area indicate any unwanted seal defects in the upper overflow area. This ensures that contaminated liquid cannot penetrate the gear unit.
6. Carrier and reducer gear. This is a very solid design. Extra large gears and bearings guarantee the overhung bearing system runs smoothly for a long time.

Multichopper operating principle

The Multichopper is another impressive macerating unit with its sophisticated user-friendly technology. This device is ideal for crushing and chopping solid materials, making it suitable for use in agriculture, the food industry and wastewater management plants. The Multichopper is particularly good at processing large and tough materials, preventing blockages and optimizing other processes.

The unique feature of the Multichopper is changeable perforated disks. The arrangement of the perforated disk, the throughput volume and the speed is mainly determined by the chopping result required. Using a pump or any other suitable inlet pressure, the medium is drawn through the openings of the perforated disk of the Multichopper. The rotating blades on the perforated disk perform many cuts per rotation. This achieves a reliable and smooth process for chopping coarse material. A centrally external adjusting screw can be used to regulate the pressure of the rotating blade to the perforated disk.

Like Multicrusher, Multichopper designed with user-friendliness in mind, it is easy to maintain and adapt to different operations. In addition, this chopper is somewhat reminiscent of a classic mechanical watch, which operates on the principle of a spring and needs to be wounded periodically. The same operation must be performed with the Multichopper – a special spring tensioner ensures that the distance between the disk and the blade is always correct (neither too large nor too small). This tensioner also acts as an indication of disk wear – when it can no longer be properly tensioned, it indicates that it is about time for renewal.

Rotorrake

Rotorrake operating principle

The Rotorrake, the final member of the Börger trio of macerating units, specializes in the efficient removal of rags and debris in wastewater management systems. This device is particularly useful in preventing blockages and damage to downstream equipment, ultimately contributing to the overall efficiency of the cleaning process. The Rotorrake’s rotating blade system is designed to collect and remove unwanted materials from the liquid stream.

The Rotorrake’s key features include a self-cleaning mechanism that increases reliability and reduces the need for manual intervention. The robust design and corrosion-resistant materials ensure durability even in harsh operating conditions. The Rotorrake is also equipped with a variable speed control system, allowing operators to adjust the machine’s performance to the characteristics of the incoming waste stream.

While all three macerating units are designed to break down solids, their specific designs and functions are tailored to different purposes. The Multicrusher is ideal for a wide range of materials, including solids and fibrous materials, making it a versatile choice for a variety of industries. On the other hand, the Multichopper shines where large and tough materials are prevalent, and its cutting blades can be customized to suit your needs. The Rotorrake, which focuses on removing rags and debris, plays an important role in maintaining the efficiency of wastewater management systems.

All macerating units manufactured by Börger have the following features:

1. Versatility. The Multichopper, Multichopper and Rotorrake together cover a wide range of materials and applications, providing versatile solutions for various industries.
2. Reliability. Börger macerating units are characterized by a robust construction and reliable operation, ensuring minimal downtime and operational disruptions.
3. Customization. Users can customize devices to their specific needs, which increases work flexibility.
4. Efficiency. These devices effectively crush and process solids, thereby increasing the overall efficiency of wastewater management processes and industrial operations.
5. Longevity. Börger macerating units are made of durable materials and equipped with features such as self-cleaning mechanisms, so they boast a long lifespan that reduces the need for frequent parts replacement and maintenance.

The Börger Multicrusher, Multichopper and Rotorrake series are examples of innovation in the field of macerating units, as each of them is tailored to solve specific challenges in solid waste management and wastewater management. Their unique features and the benefits they provide to industry highlight their importance in optimizing processes and ensuring the smooth operation of various systems. As industrial companies continue to prioritize efficiency and sustainability, Börger macerating units is becoming an irreplaceable tool for achieving efficient pumping operations when the pumped medium contains solid particles or debris.