RotaCut: The wet cutter by Vogelsang

Wet cutter with heavy material separator

  • Reliably macerates fibers and foreign matter in liquid media
  • Protects downstream system components from damage caused by heavy matter
  • Prevents blockages and clogging of pumps, fittings and pipe systems
  • Reduces the viscosity and homogenizes liquids and suspensions
  • Prevents floating layers


How the wet cutter RotaCut works
The operating principle

The medium flows steadily through the RotaCut. Foreign matter (stones, metal parts, etc.) is separated out based on its size or weight and can be easily disposed of later via a cleaning port. All floating and suspended substances within the medium (fibers, hair, bones, wood, etc.) are transported to the cutting screen by the liquid current and are reliably crushed by rotating, self-sharpening blades – even hair and industrial fibers are no problem. Liquids containing solid matter are transformed into pumpable, homogeneous suspensions. This makes the wet cutter RotaCut an effective tool for homogenizing heterogeneous media, such as is increasingly required in the food industry, abattoirs and biogas plants. Another important function of the RotaCut is effective heavy material separation. Stones or metal parts, etc., that cannot be chopped down are safely retained and channeled into a collecting container. The wet cutter RotaCut thereby effectively protects pumps, pipe systems and biogas plant parts from damage due to foreign matter.

Digitalize your product!
Control technology for Vogelsang technology

Investing in our progressive and smart control technology significantly boosts the performance and efficiency of Vogelsang machines and systems. It captures and continuously monitors key parameters like the capacity or throughput rate, rpm, pressure and power consumption. The control detects malfunctions early, and rectifies them by intervening appropriately. The integrated communication interfaces like ProfiNet and OPC UA can exchange data with other systems or a superordinate control in real time.

At the same time, the web-based user interface displays all key data clearly in all major browsers. Optionally, the data can be accessed on mobile devices for remote monitoring.

Our experts’ experience from hundreds of applications in various areas constantly inspires our software development and lays the foundation for the major benefits for the users: low operating costs, maximum availability and efficiency.

Our range of controls offers the right solution for all machine requirements and all customers’ needs. From ready-to-use, factory-tested and commissioned system solutions for end users, to basic versions for experts who want to put the finishing touches to the control technology themselves.

Options in control technology for the RotaCut

Features of the RotaCut

Separation of stones and metal parts is important for ensuring smooth operation of the cutter itself as well as of the downstream pumps and components, and also to prevent damage and blockages they may cause. Each RotaCut therefore has an integrated heavy material separator.
Vogelsang uses its proprietary software to develop cutting screens with optimized geometry for every size-reduction ratio. For operators, this means the best geometry at all times for smooth running, with minimal wear. The cutting screens are produced from wear-resistant special steel and offer twice the performance since they are reversible.
The cutting screens are exposed to high loads in cutters like the RotaCut. This is why in the RotaCut, they are not merely supported at several points, but rather their entire surface lies on a stable holder. This reduces deformation of the cutting screen and enables easy and energy-saving cutting across the entire surface.
Chopping down media with a high solids content in a small space places a great strain on the cutting screens. This is why we have optimized the holder on both the Pro and RCX series: the cutting screen is additionally stabilized by a central support. This minimizes deformation of the cutting screen and also enables efficient cutting despite high load operation.
Cutting blades and rotors have a decisive impact on the RotaCut's cutting performance. The asymmetric blade rotors we developed in-house deliver optimal chopping down performance with minimal wear. The movable bearing of the cutting blades ensures continuous contact between the cutting screen and blades – a solid foundation for reliable cutting of even the finest fibers.
Each RotaCut has a blade adjustment function that ensures that the cutting blade and screen are always in continuous contact. This contact is what enables reliable cutting of even the finest, long-fiber fibrous matter, such as hair, industrial fibers and grass entanglements.
Thanks to their design all RotaCut products are easy to service and maintain. Just a few motions are required to gain access to the cutting tools, which can be replaced on-site. The RotaCut is ready for use again in no time at all. The RotaCut does not need to be removed nor the cutter head disassembled.

Additional information:

Options of the RotaCut

The hole pattern of the cutting screens, along with the number of cuts, is decisive for the size-reduction ratio. To meet the requirements of every situation, we offer cutting screens for the RotaCut, depending on the size, with free passage from 4 mm to 50 mm. Stainless steel versions are available for aggressive media.

Additional information:
The Automatic Cut Control (ACC) automatically adjusts the RotaCut's blades and maintains constant pressure between the cutting screen and blades. Moreover, the pressure can be adjusted during operation; as high as necessary and as low as possible. This extends the lifetime of the cutting blades and screen, and enables automatic operation.
ACCplus further reduces the cost of maintenance and monitoring of the cutter. It monitors the cutting blades status online and displays it on an external display. This means it's no longer necessary to place the cutter out of service and open it to determine the cutting blades status. Additionally, this information can be processed and displayed by the (central) control and/or remote control.
The Auto-Reverse function detects blockages, such as those caused by coarse disruptive matter, and initiates corrective action. By periodically reversing, the function further ensures that a pair of sharp cutting edges is always used while dull ones are sharpened on the opposite site. This delivers optimal cutting performance with reduced power consumption.

Additional information:
For smooth operation of many plants, reliable foreign matter separation of stones and metal parts is a must, in addition to cutting. The adapted design of the heavy material separator is crucial. It has to be compatible with the requirements for the respective application as well as shredding. The RotaCut offers the most comprehensive selection of heavy material separators.
The Debris Removal System (DRS) available for the RotaCut RCX series enables regular removal of separated heavy material during ongoing operation. The system removes the heavy material with only minimal loss of medium (only around 15 l). In comparison to conventional solutions, the DRS reduces the work required by 80%.
The housing of the RotaCut is made of steel and is completely galvanized. Stainless steel variants are available for particularly aggressive applications. Cutting screens and blades are also available in steel and/or stainless steel versions.
Hydraulic or geared motors adapted for the prevailing conditions of the application are used to drive the cutter. A selection of geared motors with various power ratings and different speeds are available for every type, so the RotaCut can always be individually adapted to the respective application. The perfect motor is available for every task, from protection against fibers and coarse matter through to fine, homogeneous preparation of a suspension. Suitable cutting screens and blade rotors are available for individual adjustment of the size-reduction ratio.

The series of the wet cutter RotaCut

  • The economical basic cutter[br]RotaCut RC
  • The economical cutter for demanding applications[br]RotaCut RCpro
  • The easy to maintain and user-friendly cutter[br]RotaCut RCQ
  • The operator-friendly cutter for demanding applications[br]RotaCut RCQpro
  • The most powerful cutter of the series[br]RotaCut RCX
  • The cutter solution for tankers[br]RotaCut MXL

The economical wet cutter
Wet cutter RotaCut RC

The RC series RotaCut are the tried and tested basic version of the wet cutter RotaCut. With flow rates up to 600 m³/h, they deliver reliable and economical cutting of fibers and disruptive matter in straightforward applications, and also separate heavy material, thereby protecting downstream parts and components from damage, blockage and entangled material, e.g. in wastewater technology and industry. Thanks to diverse options, the RC series can be individually configured for the respective task. From cost-effective straightforward pump protection for temporary use through to reliable preparation of media in everyday operation. For drive power, there is a choice between hydraulic and geared motors. Thanks to the pivoting cutter head, maintenance and checking the cutter head is always easy, and if needed, the cutting blades and cutting screen can be quickly replaced.

The economical wet cutter for demanding applications
Wet cutter RotaCut RCpro

The RCpro series is designed for reliable and economical disintegrating of media with a high solids and fibrous matter content, e.g. in industry and biogas plants. The stable design of the cutter head, clever features such as the cutting screen support, as well as useful options for the cutting blades, blade rotors and cutting screen make the RCpro series an economical solution when conventional cutters are not powerful enough. With flow rates up to 600 m³/h, their robust design enables them to also be used on the discharge side (up to 3 bar is possible). In combination with the Compact XL heavy material separator, large amounts of heavy material in the medium can be reliably separated out. Maintenance and service are quickly and easily carried out by pivoting up the cutter head.

The easy to maintain and user-friendly wet cutter
Wet cutter RotaCut RCQ

The RCQ series RotaCut models feature easy to maintain and user-friendly design for sewage treatment plants and wastewater technology or industrial applications with flow rates up to 300 m3/h. The cutters can be easily and conveniently monitored online with modern control technology. With the optional ACC plus, the status of the cutting blades is also monitored and visualized on an external display. The operator therefore always knows what's going on; there's no need to interrupt operation or even open the cutter. In addition, this information can be displayed graphically by the control – which is very useful if you want to monitor and check the RotaCut centrally or by remote control. A message informs the operator when the blades require changing so that you can plan any spare part orders and maintenance well in advance. Thanks to the new design of RCQ series cutters, maintenance work and even replacement of cutting components themselves can be performed quickly on-site by the operator's personnel or by a service partner.

The easy to maintain and operator-friendly wet cutter for demanding shredding applications
Wet cutter RotaCut RCQpro

Efficient cutting of coarse and fibrous matter in liquid media with effective protection from foreign matter and heavy material – the wet cutter RotaCut units in the RCQpro series offer all of this – at flow rates up to 600 m3/h. They are the ideal solution for processing media with a high solids and fiber content reliably and cost-effectively while still maintaining excellent ease of maintenance and operation, e.g. in biogas plants or in the food industry. Thanks to their robust design, they can also be used on the discharge side (up to 4 bar is possible). RCQpro series cutters also support online monitoring of cutting blades status with the ACC plus – including via remote control. When combined with a PCU, the operator receives detailed information regarding the load of the cutter and the status of the cutting blades without having to interrupt cutter operation or open the wet cutter RotaCut itself. Thanks to the service-oriented concept, parts replacement, including replacement of the Quality Cartridge mechanical seal, can be carried out in a short time on-site.

The most powerful wet cutter of the RotaCut series
Wet cutter RotaCut RCX

The RCX series cutters represent the logical further development of the wet cutter RotaCut. For flow rates up to 1200 m³/h, they epitomize cost-effective cutting for rugged applications in tight spaces. The RCX types feature extremely robust motors as well as solid and sturdy design, allowing for use on the discharge side at up to 6 bar. A completely new concept has been developed for good service and maintenance accessibility despite the larger dimensions and weights: The pivoting service flap allows for easy access to the cutter and thanks to the horizontal arrangement, the cutting blade and screen can be replaced with just a few motions. All RCX types feature a cartridge mechanical seal that requires less time to change, enhances reliability and increases maintainability overall.

The wet cutter solution for tankers
Wet cutter RotaCut MXL

In developing the wet cutter RotaCut MXL, special attention was paid to taking into account the exigencies of vehicle design. The design was specially developed for mobile use on tankers, delivers throughput up to 780 m3/h and can be quickly and easily integrated into the vehicle. The wet cutter RotaCut also performs a range of essential functions for mobile applications: Foreign matter such as stones and metal parts are reliably retained in the generously dimensioned heavy material separator. When pumping liquid manure, for example, the wet cutter RotaCut MXL cuts the coarse matter and fibrous matter, thereby homogenizing the entire medium. Drive power is usually provided by the hydraulics available on most vehicles. After opening the generously dimensioned service flap, the separated heavy material can be easily removed, and access to the cutter head for service and maintenance is enabled.