FAQ

Industrial IoT (IIoT) refers to the intelligent networking of machines, systems, and digital services. For cleaning and distillation systems, this enables secure access to relevant operating data as well as efficient support from the service team.

Connectivity enables operators to analyze machine conditions, diagnose malfunctions more quickly, and make targeted technical adjustments. This helps operators increase plant availability, reduce unplanned downtime, and make service calls more efficient.

Using Renzmann’s remote access solution, service technicians can, for example, check machine parameters, optimize exhaust air control settings, diagnose frequency converters, or monitor the load cell electronics of ROTOmaX distillation systems. At the same time, on-site employees can receive targeted support with troubleshooting and problem-solving.

Industrial IoT thus lays the foundation for modern, connected manufacturing in line with Industry 4.0 and enables greater process reliability, equipment availability, and service quality.

The ROTOmaX is our most efficient machine when it comes to solvent recovery. Depending on the solvent and the degree of contamination, it achieves a recovery rate of up to 97%. Intelligent load cell technology and a high degree of automation make the machine significantly more efficient than comparable machines from other manufacturers.

The ROTOmaX was specifically designed for heavily contaminated solvents, washing media, and solutions containing production-related residues. The rotor and scraper system prevents buildup and ensures reliable operation even when solid content is high.

Yes. The ROTOmaX is designed for industrial solvent recovery in both batch and continuous operation. This allows the distillation unit to be flexibly adapted to different production processes, solvent volumes, and levels of contamination.

In batch mode, a defined quantity of contaminated solvent is processed. This operating mode is particularly suitable for companies with fluctuating solvent flows, different production batches, or varying residues from printing inks, paints, coatings, and other chemical processes.

For applications involving a constant stream of solvent-containing production waste, the ROTOmaX offers the option of continuous solvent treatment. In this process, the contaminated medium is fed into the system continuously, while the treated solvent is recovered on a continuous basis. This enables particularly cost-effective solvent recovery during continuous operation and high throughput rates.

Thanks to its proven rotor and scraper system, the unit reliably processes even heavily contaminated media with high solids content. When combined with the optional vacuum technology, the ROTOmaX is suitable for numerous applications in solvent treatment, solvent recycling, and vacuum distillation of solvents in the printing, coatings, packaging, and chemical industries.

All Renzmann distillation systems are ATEX-certified and classified as Category 1 equipment for Zone 0 inside the distillery, and Category 2 for Zone 1 outside the distillation system.

While RENZMANN generally classifies the interior of the boiler as Zone 0, some competitors classify this area only as Zone 1. To the operator, this difference may initially seem purely theoretical. In fact, however, it has significant implications for the safety of the system and the required inspections.

Classification as Zone 0 has a direct impact on the plant’s design: components inside the distillation kettle that could serve as potential ignition sources—such as agitators or level switches—are then subject to significantly stricter requirements and must be type-tested. These tests incur costs.

If, on the other hand, the interior of the boiler is classified only as Zone 1, many of these requirements can be reduced. This makes the development, testing, and certification of the system significantly less expensive.

However, in RENZMANN’s view, safety considerations must not be subordinated to economic considerations. For this reason, the company adheres to the strictest available regulations and evaluates actual operating conditions rather than the minimum design requirements.

You can find a detailed explanation of our ATEX safety concept here.

The ROTOmaX uses load cells for continuous weight measurement. This allows for precise monitoring of the fill volume, distillate volume, and residue volume. Actual performance data can be retrieved thanks to load cells that measure productivity. More data provides the opportunity to tailor the distillation process more precisely to your specific application. Other manufacturers do not offer any means of productivity analysis, which significantly compromises process control and efficiency.

The stirring and scraping mechanism in the ROTOmaX keeps the distillate constantly in motion, preventing deposits and caking on the heating surfaces, thereby improving heat transfer and increasing efficiency. During draining, the scraping mechanism runs in reverse and assists in the automatic discharge of residues through a DN 200 outlet. Thanks to the larger outlet, we can concentrate the distillate even more than other manufacturers. The stirring and scraping mechanism is made of low-maintenance bronze contact scrapers and is therefore very durable.

No. The ROTOmaX was designed for largely automated operation and does not require constant operator supervision. In particular, the ROTOmaX Automation can be started automatically using timer functions and carries out the distillation process on its own.

During operation, the system automatically monitors the relevant process parameters. The operator does not need to be present at the machine at all times. As soon as intervention is required—for example, when the residue container needs to be replaced—the system alerts the staff with a corresponding signal.

As a result, industrial solvent recovery does not require a full-time operator. In many facilities, the ROTOmaX is operated by employees who also perform other tasks. These include, for example, cleaning printing unit components, operating a mixing system, packaging activities, or logistical tasks within the production process.

Automated process control significantly reduces labor costs and enables cost-effective solvent treatment even with limited staff resources. Companies benefit from efficient solvent recovery without having to allocate additional specialized personnel solely for the operation of the distillation plant.

The ROTOmaX is therefore an attractive solution for automated solvent recovery, particularly in the printing, packaging, coating, and chemical industries, offering low operational requirements and high system availability.

That depends on the composition of the feedstock. Typically, only a highly concentrated, paste-like residue remains. As a result, operators incur only minimal disposal costs. At the same time, you save money because you need to purchase less fresh solvent.

Highly efficient thickening is made possible by the built-in load cell technology and an intelligent stirring and scraping mechanism that prevents buildup on the heating surfaces. This ensures optimal heat transfer. The geometry of the distillation kettle is also a key factor in this process. The flat bottom and larger diameter allow for better concentration. Higher concentration also means a higher recovery rate. You can also see in this video just how viscous the discharge can be with our ROTOmaX.

What kinds of problems can be diagnosed via remote maintenance?

Remote Access allows users to monitor and analyze numerous machine functions. These include, among other things, exhaust air control settings, diagnostics for variable-frequency drives used for speed control, monitoring of load cell electronics in ROTOmaX distillation systems, and general machine and process parameters.

This allows the causes of errors to be identified more quickly and provides operators with targeted support in troubleshooting malfunctions.

Yes. The ROTOmaX is also suitable for processing high-boiling-point solvents and offers the most cost-effective method for solvent recovery at high boiling points. Vacuum technology lowers the boiling point of the medium, allowing distillation to take place at significantly lower temperatures.

This offers significant advantages when processing temperature-sensitive solvents, complex solvent mixtures containing nitrocellulose, and media used in the printing, paint, coating, and chemical industries. Gentle vacuum distillation of solvents reduces thermal stress, minimizes product degradation, and simultaneously lowers the energy requirements of the distillation process.

Thanks to this technology, the ROTOmaX is suitable for a wide range of applications in industrial solvent treatment, solvent recycling, and the recovery of high-boiling-point solvents. This allows even challenging media to be efficiently treated and returned to the production process.

On our homepage, you can start by specifying the type of material you need to clean. Do you want to clean parts, containers, or rollers and cylinders? You will then see an initial selection of our available machines.

In addition to the type of items being washed, the quantity, degree of soiling, and your production process are also key factors. For container washers, important considerations include the container’s shape (cubic or round) and whether it has a spout.

We offer washing machines equipped with brushes or spray bars. Additionally, it is important to consider whether you are cleaning with solvents or alkaline solutions. We would be happy to provide personalized advice tailored to your specific needs. You also have the option to schedule a test run at our technical center and clean your actual soiled parts in our machines. This will allow you to see for yourself how efficient and safe our machines are.

A container washing machine automatically cleans industrial containers such as mixing tanks, IBCs, batching tanks, and many others using rotating spray systems or modern brush technology, as well as suitable cleaning agents. Depending on the application, it can remove paints, varnishes, resins, or printing inks. Automated container cleaning ensures consistent cleaning results and significantly reduces manual labor. Downtime is minimized and manufacturing processes are optimized. Explosion-proof cleaning systems, such as those from Renzmann, also offer a very high level of safety when cleaning with solvents.

Modern container washers are suitable for cleaning a wide variety of industrial containers. These include mixing tanks, mixing vessels, batching tanks, transport containers, printing ink tanks, stainless steel containers, and IBC containers (made of steel). A special cleaning solution is also available for bunghole drums.

Depending on the container size, degree of soiling, and cleaning requirements, different cleaning methods and machine designs are used.

RENZMANN’s container cleaning systems can be designed for a variety of container geometries and applications. Even containers with attachments, outlets, or complex internal contours can be cleaned efficiently and consistently. This allows for the reliable removal of coatings, paints, printing inks, adhesives, and other production residues.

Choosing the right container washer depends, among other things, on the container dimensions, the media used, and the requirements for industrial container cleaning. For more information, see“Which machines clean containers?”

Depending on the machine, containers of very different sizes and shapes can be cleaned. Our washing machines for smaller transport containers can clean containers with a diameter as small as 350 mm. The minimum height of the container to be cleaned is 200 mm. However, common diameters for mixing tanks and containers range from 600 mm to 1,700 mm. Container heights range from 700 mm up to 1,700 mm. Our Robus can clean containers with a diameter of up to 2,050 mm; the maximum container height is 1,700 mm.

Do you have specific requirements? Please feel free to contact us. We regularly customize our machines to meet individual customer needs and can advise you on which solutions make the most sense from both a technical and economic standpoint.

The duration of a cleaning cycle depends on various factors. The most critical factors include the type and degree of contamination, the container’s geometry, the cleaning agents used, and the requirements for the cleaning result.

In addition to the actual washing time, the on-site exhaust air capacity and the logistics of the items being cleaned also affect the total cycle time. For example, the time required for exhaust ventilation after the washing process, as well as the time needed to load and unload the containers or parts, all impact the overall cleaning process.

Depending on the degree of contamination, system configuration, and operating conditions, container and parts cleaning machines can typically perform between two and four cleaning cycles per hour. Automating container cleaning ensures consistent cleaning results and a high level of process reliability.

Renzmann helps customers design the right cleaning solution to ensure that cleaning performance, throughput, and cost-effectiveness are optimally tailored to their specific production requirements.

We offer a variety of washing machines for container cleaning. The right choice depends on the size of the containers to be cleaned, their exact shape (round or cubic, with or without an outlet), the available space, and the cleaning agent used (solvents or aqueous cleaners).

Washing machines for solvent cleaning:

Our ROBUS, RIO-VSmarT, SP, and BKM models are suitable for round containers with spouts. While the ROBUS combines a spray system with brush cleaning, the RIO-VSmarT relies solely on brush cleaning. The SP features high-pressure cleaning via a spray head and nozzles. The BKM combines brush rollers and a spray system, cleaning not only the interior but also the exterior (optional).

Our SKM is particularly well-suited for cleaning both the interior and exterior of round containers, with or without a spout, especially those with a large diameter. It cleans the interior using a rotating spray lance.

Our 6090 is ideal for round containers without a spout and with a small diameter. It cleans both the inside and outside with brushes.

Our SP is suitable for cubic containers such as steel IBCs.

Washing machines for cleaning with aqueous alkaline solutions:

Here, too, our SP70 is the right choice. It uses a spray pressure of 70 bar to tackle stubborn dirt and is therefore suitable for use with aqueous alkaline solutions.

Using an automated container washing machine can help companies significantly reduce the costs of container cleaning. Compared to manual cleaning, this approach allows for the standardization of cleaning processes, shorter cleaning times, and more efficient use of personnel resources.

In addition, it is possible to optimize the use of cleaning agents, avoid waste caused by inadequately cleaned containers, and reduce production downtime. Automated container cleaning ensures consistent cleaning results, greater process reliability, and consistent cleaning quality.

Additional cost-saving opportunities arise from combining a container washing machine with a distillation system. This allows used solvents to be recycled and reintroduced into the cleaning process. This closed-loop system reduces the consumption of new solvents, lowers disposal costs, and helps companies implement sustainable circular economy concepts.

In addition to the economic benefits, automated container cleaning also helps improve workplace safety. Employees come into contact with cleaning agents, solvent fumes, or contaminated containers much less frequently, which improves working conditions and reduces potential health risks.

The actual savings potential depends on factors such as the number of containers to be cleaned, the degree of soiling, the cleaning agents used, and operational processes. Renzmann helps customers find a cost-effective and sustainable cleaning solution that is optimally tailored to their specific requirements.

Container washing machines are designed to reliably remove a wide variety of production residues. Depending on the application and the cleaning agent used, these machines can remove, among other things, lacquers, paints, printing inks, resins, adhesives, coating materials, and solvent-based or water-based residues from containers.

The use of tailored cleaning processes allows even stubborn dirt and dried-on product residues to be effectively removed. Modern container cleaning systems ensure consistently high cleaning quality and reproducible results.

The types of contaminants that can be removed depend on factors such as the cleaning medium used, the degree of contamination, and the tank geometry. For demanding applications, Renzmann offers customized solutions for industrial tank cleaning. At Renzmann’s in-house technical center, you can also have your actual contaminated tanks cleaned to find the perfect solution for your needs.

Depending on the application and the type of contamination, container washers can use a variety of cleaning agents. These include, in particular, solvents as well as aqueous cleaning agents based on alkaline or specialized detergents.

The choice of an appropriate cleaning agent depends on various factors, such as the residues to be removed, the production materials used, and the cleaning quality requirements. While solvents are often suitable for removing paints, printing inks, resins, or adhesives, aqueous cleaning methods are primarily used for water-based products and certain industrial applications.

Renzmann offers solutions for both solvent-based and aqueous tank cleaning and helps companies select the optimal cleaning method for their specific process.

Yes! All solvent-based container washing machines are designed for use in potentially explosive atmospheres. Explosion protection and plant safety play a crucial role, particularly when cleaning containers with solvent-based residues.

All washing machines provide explosion protection in accordance with ATEX, Category 1 (with type approval) for Zone 0 inside the wash chamber, and Category 2 for Zone 1 outside the washing machine. The machines thus ensure a safe cleaning process when processing flammable substances.

Renzmann has decades of experience in explosion protection and is also known for its particularly rigorous safety standards in the field of distillation systems. This ensures the highest level of safety for machine operators and owners.

Yes, Renzmann machines can be maintained remotely using a secure remote access solution. This allows service technicians to access the machine control system, perform diagnostics, and assist customers with troubleshooting without the immediate need for an on-site visit.

Remote maintenance enables rapid support for troubleshooting, commissioning, and optimizing machine parameters. This helps reduce downtime and restore production processes more quickly. For more information about the Secoma platform we use, click here.

Cleaning tanks with spouts, fittings, internal components, or complex geometries presents unique challenges. Modern tank washers can reliably clean even hard-to-reach areas thanks to specially designed washing systems and customized cleaning concepts.

Thanks to intelligent engineering, Renzmann develops customized solutions that are precisely tailored to the specific requirements of each container and production process. Factors such as container size, geometry, type of contamination, and cleaning requirements are taken into account as early as the planning phase.

Various optional features are also available for specialized applications, such as outlet cleaning systems or other custom accessory solutions. This enables even complex container geometries to be cleaned efficiently and reproducible cleaning results to be achieved.

Yes, depending on the machine selected, it is possible to clean both the interior and exterior of containers in a single cleaning step. This combined interior and exterior cleaning ensures that both product residues inside the container and dirt on the exterior surfaces are reliably removed.

This is particularly advantageous for mixing tanks, batch tanks, and transport tanks, as the tanks are immediately available for use in the production process after cleaning. Automated tank cleaning ensures consistently high cleaning results and significantly reduces the amount of manual cleaning required.

Renzmann offers two systems—the SKM and the BKM —that perform this function. While the SKM cleans using a spray system, the BKM reliably removes residue with an intelligent brush system.

Yes, specialized container washers enable the efficient and automatic cleaning of steel IBCs (Intermediate Bulk Containers). This process reliably removes residues such as paints, varnishes, printing inks, resins, adhesives, and other production materials from the containers.

Cleaning is performed using washing systems designed to match the container’s geometry, ensuring thorough internal cleaning even for large-volume containers. Automated cleaning processes enable consistent cleaning results while reducing the need for manual cleaning.

The appropriate solution for IBC cleaning depends, among other things, on the container size, the type of contamination, and the cleaning agents used. Renzmann offers high-performance cleaning systems for a variety of industrial applications.

For the industrial cleaning of IBC containers, Renzmann offers a specially developed solution with its SP series .

It's easy to get a quote: Contact us by email at sales@dw-renzmann.de or call us on +49 (0) 6751 878-0. Together, we will analyze your needs - e.g. which parts you want to clean or which solvent you want to treat - and prepare a tailor-made offer for you.

Our sales staff will support you with their in-depth specialist knowledge. In addition, the sales staff work closely with our technical center so that application tests can also be carried out if required.

We have a worldwide sales network. You can find the contact person responsible for your region here. Alternatively, our sales team will be happy to help you directly and put you in touch. For customers in Germany (and selected other countries), sales are handled directly by our company headquarters in Monzingen.

We need some basic information to provide targeted advice: What is to be purified or distilled? In what quantities? How heavy is the contamination? Are there special geometries or requirements for the cleaning or recovery result? Describe your task to us by e-mail. We will then be happy to send you the appropriate questionnaire. Based on this query, we can create a customized concept for your application.

Our consultation begins with a personalized assessment of your requirements and needs. You describe your requirements to us—for example, the solvents you use—and we recommend the right machine for you. For more complex requirements or if you have any uncertainties, we offer washing or distillation trials at our technical center. This allows you to see under real-world conditions which system is best suited for you. You can request an appointment for a washing or distillation trial directly here.

Distillation is a separation process used to separate mixtures of liquids or to extract a liquid from a solution. It takes advantage of the different boiling points of the substances present.

The mixture is heated. The component with the lower boiling point evaporates first and rises as vapor. This vapor is cooled in a condenser and condenses back into a liquid. The condensed liquid (distillate) is collected in a receiving flask. Substances with a higher boiling point remain in the flask.

Distillation Process

1. Heating the liquid mixture
2. Evaporation of the component with the lower boiling point
3. Condensation of steam in the cooler
4. Collecting the distillate in the receiving vessel

Important: Distillation is particularly suitable for separating liquids with significantly different boiling points.

Solvent distillation is a separation process in which a solvent is vaporized by heating and then liquefied again through condensation. In this process, the solvent is separated from dissolved substances or impurities.

Operating principle

1. A solution is heated.
2. The solvent (e.g., water, ethanol, acetone) evaporates because of its lower boiling point.
3. The steam is cooled in a condenser.
4. The condensed solvent is collected.
5. Non-volatile substances remain in the distillation flask.

Applications

• Solvent Recovery in the Chemical Industry
• Cleaning, purification, and recycling of used solvents
• Separation of products based on chemical reactions
• Environmental protection, since solvents can be reused instead of being disposed of

Example

A paint factory uses acetone to clean its equipment. The used acetone contains paint residues. Through solvent distillation, the acetone is vaporized and condensed, while the paint residues remain behind. The purified acetone can then be reused. Only the paint residues need to be disposed of.

Advantages

• Saves costs by reusing the solvent
• Reduces waste
• Enables high levels of purity

In short: Solvent distillation is used to separate and recover a solvent by evaporating and condensing dissolved substances or impurities.

In general, all industries that use solvents benefit from solvent recovery. Recycling reduces costs by minimizing the need to purchase expensive new solvents. Solvent recovery also allows companies to implement or expand circular economy practices within their own operations. Specifically, the following industries regularly use solvents: printing, paint and coatings manufacturers, chemicals, automotive, plastics, pharmaceuticals, textiles and leather, optics and glass, electronics, metals, and others.

A distillation unit is worthwhile even when only very small amounts of solvent are generated. This is the case, for example, with manufacturers of flexographic printing plates. The wash-off solvent generated during the production of printing plates is ideal for recovery in an in-house distillation unit.

For very expensive solvents, a distillation unit can be cost-effective starting at 20 tons per year. On average, purchasing your own DW-type machine makes sense starting at 50 tons per year.

We would be happy to provide you with personalized advice. You can contact our sales team here.

The primary goal of solvent disposal is to ensure that contaminated solvents are disposed of properly. This is costly and time-consuming in two ways: Businesses that use solvents need them on a regular basis and must therefore continually purchase fresh solvents. They are dependent on service providers and rising raw material prices. They must maintain large stocks of clean solvents, which incurs storage and handling costs. The disposal of contaminated solvents is also very expensive.

On the other hand, having your own in-house solvent recovery system is almost always worthwhile. Solvent recovery is carried out using a distillation unit that is tailored to your solvent volumes, the type of solvent, and your production process. Through the separation process involved in distillation, it allows for the recovery of a large proportion of clean solvent. Ideally, only a small amount of material remains to be disposed of. We would be happy to calculate your return on investment (ROI). Contact our sales team here.

The average return on investment for our ROTOmaX, for example, is less than 1.5 years. For our ROTO distillation plant, the average ROI for 30 tons of ethanol per year is 1.8 years. We would be happy to calculate your exact ROI based on your specific data (labor, heating, and disposal costs, as well as operating hours, etc.). For a precise calculation, please contact our sales team at vertrieb@dw-renzmann.de.

In general, our distillation units can distill any solvent with a boiling point under vacuum of less than 180 degrees.

These include, for example: 1,3-dioxolane, 1-ethoxy-2-propanol, 1-methoxy-2-propanol, 2-ethylhexanol, 2-ethylhexyl acetate, 3-methoxy-3-methylbutan-1-ol, acetone, benzyl alcohol, butanol (-n-), butyl acetate, butyldiglycol, butyl glycol, butyl glycol acetate, cyclohexyldiethanolamine, decahydronaphthalene, decane, diacetone alcohol, diethanolamine, diethylene glycol, diethylene glycol monomethyl ether, dimethylacetamide, DMF, DMM, DMPU, DMSO, dodecane, DPM, ethanol, ethanolamine, ethyl acetate, ethylene glycol, ethyl lactate, heptane, hexane, IPA, MEK, methanol, methyl acetate, methylcyclohexane, MIBK, N-methylformamide, NMP, phenoxyethanol, PMA, propanediol, propanol (-n-), propyl acetate (-i-), propyl acetate (-n-), styrene, tetrachloroethane, tetradecane, toluene, TOU, tridecane, undecane, xylene (mixture of isomers), xylene (-m-), xylene (-o-), dipropylene glycol monobutyl ether, p-cymene

However, our ROTOmaX can also purify aqueous solutions. Please feel free to contact us for a comprehensive consultation: vertrieb@dw-renzmann.de

The exact recovery rate for solvent distillation depends heavily on the type of solvent and the degree of contamination. Depending on the solvent, our smallest distillation unit (Model M) achieves a recovery rate of 85%, while our largest distillation unit (ROTOmaX) achieves a recovery rate of up to 97%.

We offer our customers the opportunity to have their original contaminated solvent distilled on a trial basis at our in-house technical facility. This allows you to see for yourself the exact recycling rate. In any case, you will receive a detailed report and, upon request, samples for analysis by your own experts.

The cost of a solvent recovery distillation system depends primarily on the required processing capacity, the solvents used, the degree of contamination, and the desired level of automation.

For applications in the paint, coatings, and printing industries, the initial investment costs for smaller systems often start in the mid- to high-five-figure range. Industrial distillation systems designed for larger volumes of solvents or complex solvent mixtures can cost over 200,000 euros, depending on the model.

However, when assessing cost-effectiveness, it is important to consider more than just the initial purchase price. By recovering and reusing solvents, companies can significantly reduce their disposal and procurement costs. Our distillation units have an average return on investment (ROI) of about 1.5 years, which can be attributed in part to their high recovery rates.

For an accurate price quote, we recommend a custom design based on the volume of solvents to be processed and your specific process requirements. We would be happy to provide you with a customized quote for your application.

We also offer to distill your original contaminated solvents on a trial basis in our in-house technical laboratory . This allows you to see the efficiency for yourself and back up your investment with reliable data.

Renzmann has decades of experience in developing solutions and collaborating with customers in the printing, packaging printing, and ink and coating manufacturing sectors. However, the machines are not limited to these industries. Renzmann also has numerous customers from the automotive sector, the chemical industry, the plastics industry, the optics and glass industry, the pharmaceutical industry, the textile and leather industry, the coatings industry, and many others. High-precision engineering also makes custom solutions and custom-made products possible. Please feel free to contact us at vertrieb@dw-renzmann.de

Our machines are based on proven technology, but can be adapted to customer-specific requirements at additional cost. These include, for example, special adapter systems, control concepts suitable for integration, adaptations to structural conditions or special process-related functions. Simply contact us - together we will check what is technically feasible and economically viable.

Yes, we deliver worldwide and have decades of experience in the production of machines for the international market. Our machines meet country-specific requirements, both in terms of technical standards and regulations as well as documentation. Our local sales partners also support you with communication and project management.

Generally, you will receive your quotation within a few working days. More complex projects that require technical consultation or trials in the technical center may take a little longer. We will keep you informed of the status in a transparent manner. Request a quote.

We supply ATEX-compliant machines for operation with flammable solvents. This is based on Directive 2014/34/EU (current version) and the associated guidelines of the EU Commission. With our distillation units, however, we go one step further than other suppliers. Unlike other manufacturers, we define Zone 0 inside our distillation units. This means that, in addition to all electrical devices, all moving mechanical parts inside the distillation bubble are also type-tested and approved for permanent operation in Ex Zone 0. You can find out more under "Our ATEX protection concept".

Sustainability is not an add-on for us, but part of our technology philosophy: our distillation units allow for the recovery and reuse of solvents, thereby reducing disposal costs and resource consumption. Our washing machines are designed so that cleaning media can be used efficiently and processes can be designed to conserve resources. The durability of our machines also contributes to the environmental footprint.

Some of our machines for washing and distillation tests are available in our technical center in Monzingen. You can experience them live during a test with your own materials. Alternatively, we will be happy to send you technical documentation or reference reports - we can also organize a digital viewing appointment on request. You can find out more about our technical center here.

You can contact us directly via our service hotline or by e-mail. Please have the serial number of the machine and a brief description of the fault to hand.

Via our hotline by phone or MS Teams (during our business hours)
+49 6751 878 400

As a rule, we can respond within 72 hours, depending on the location and availability of our service technicians, prioritizing machine downtimes and associated downtime over all other activities.

Yes, our machines can be equipped with optional remote diagnostics features. This is possible, for example, with the Secomea SiteManager. The remote maintenance router can be operated via LTE (cellular network) or, alternatively, via a LAN connection. Our support team can then perform initial analyses and troubleshooting remotely.

We also offer the option of guiding and supporting your maintenance technicians directly in the field using AR data glasses (ATEX-certified).

The benefits include support for machine malfunctions and the ability to adjust machine settings without the need for a technician with specialized knowledge. Specifically, this means that a mechanic on-site can receive remote support from the Renzmann team—both for troubleshooting and, in certain cases, for commissioning.

This enables us to provide support very quickly, particularly for machines that are directly integrated into production, such as those used in the manufacture of flexographic printing plates.

In addition, the control system on machines with exhaust air controls can be recalibrated, or the scale electronics on ROTOmaX-type distillation units can be checked.

For machines equipped with frequency converters for motor speed control, diagnostics and adjustments can also be performed here.

Please send your spare parts request by e-mail, stating the machine designation, machine number and part number, if available.

Yes, we offer individual maintenance contracts with different service levels. These include regular inspections, remote support and preferential on-site service. Request your maintenance contract here.

In addition to the inspection intervals specified in the operating instructions (daily, weekly, monthly), which must be carried out by the operator, we recommend annual maintenance by trained Renzmann personnel. You can find more information on this under "Service".

The maintenance intervals depend on the machine type and the intensity of use. As a rule, we recommend an annual inspection by our customer service department. This includes the following services:

• Checking the machines using checklists
• Exchange of standard replacement lines
• Recording of defects (repair as follow-up order)
• Process optimization
• Documentation of all activities carried out

Upon order confirmation you will receive information on the expected delivery time.

Yes, we will be happy to provide you with a digital copy of the operating instructions or technical documentation. Please state the machine serial number and write to us.

We train machine operators and maintenance staff - either at your premises or at our plant in Monzingen. We adapt the content to your individual needs. Simply contact us by e-mail.

As a rule, we guarantee the availability of spare parts for at least 10 years from the production date. We are happy to check the availability of older machines on an individual basis.

Yes, we offer retrofit and modernization solutions, e.g. to increase energy efficiency

The Renzmann technical center is your point of contact for practical washing and distillation trials with your own materials. You send us contaminated components or solvents; we test, analyze and advise - either on site or by means of a detailed analysis report. This enables you to find the right cleaning solution for your specific requirements. Request an offer for your washing or distillation trial here.

We carry out washing trials with ink-carrying parts such as doctor blades, hobbocks or containers - even with complex geometries. We also offer distillation tests with contaminated solvents. So that you can process and reuse them in future with your own distillation unit and thus reduce your disposal costs.

Our tests are based on your real contaminated media, provide practical results and enable a well-founded machine selection. By recovering solvents, we promote sustainable processes. The results help you to invest economically and in an environmentally friendly manner. Request an appointment for a washing and distillation trial here.

Our technical center in Monzingen is equipped with the following machines:

• WM 3400 - Cleaning of parts with hobbock spray lance and hose rinsing
• ROBUS, SKM, SP50 - for round or cubic containers with or without outlet
• ROTOmaX 30 - for the recovery of solvents with batch or refill operation.

All machines cover different requirements and container sizes. Details on the machines can be found here.

You contact us, receive a quote, send in your materials and decide whether you want to take part in person. We will then advise you on your optimum cleaning or distillation solution.
You will always receive a detailed report with before/after pictures. We will also be happy to send you solvent samples by prior arrangement.

If your current cleaning medium - whether solvent-based or aqueous-alkaline - does not deliver the desired results, we will advise you specifically on alternative solutions in the technical center. We can also carry out dissolution tests with various media on site as part of a washing trial. We always have a selection of common solvents available in small quantities so that we can react quickly and flexibly to your cleaning requirements. You can request your personal appointment at the technical center here .

The costs for washing and distillation tests are calculated individually and offset against the price when a machine is subsequently purchased - making the test a worthwhile investment.

You can reach us at technikum@dw-renzmann.de or by telephone at +49 (0) 6751 878-0.