Find answers to frequently asked questions
The water dispensers, found in homes, offices and public spaces, provide quick access to drinking water, often chilled or sparkling. Essential for hydration, water dispensers meet the need for fresh, clean water, providing a practical and environmentally friendly alternative to bottles, with a steadily growing popularity. DKR manufactures, operates and maintains water dispensers for offices, schools and the HORECA sector.
The principle is to take water from water bottles or the water mains, treat it with cooling or heating, and make it available via a tap, thanks to efficient and safe internal mechanisms. The main components comprise a cooling system (with compressor, cooling circuit and heat exchanger) and a heating system (with electric resistance and thermostat).
Purity is guaranteed by filtration systems (e.g. activated carbon, ultrafiltration, reverse osmosis) that remove impurities and odours. The water is dispensed through dedicated taps with a drip tray and a control panel. There are flask dispensers (water drops by gravity, requiring periodic replacement of the container), those connected to the water mains (POU, with crucial internal filtration and continuous flow) and compact countertop models, available in both versions.
Cooling uses a refrigerant cycle (compressor, gas, condenser, valve, exchanger). Heating uses an electrical resistance in a dedicated tank, keeping the water hot (80-95°C) and ready for use.
Regular maintenance is essential: external and tray cleaning, periodic internal sanitisation of circuits, filter replacement (for POU models) and checking the integrity of the flasks. Benefits include great convenience (water at different temperatures), hydration incentive, potential cost savings, environmental sustainability (reduction of single-use plastic) and improved water quality through filtration. DKR pays particular attention to the maintenance of its systems, guaranteeing a comprehensive and reliable service over time.
Le water housesor 'smart drinking fountains' are emerging as a solution for water supply in urban centres, offering drinking water, often chilled and sparkling, at little or no cost. For this DKR offers water house solutions that can be customised to the needs of each municipality. At a time of increasing attention to sustainability, they represent a concrete alternative to bottled water, promoting responsible consumption and testifying to the commitment of local administrations to ecological practices and collective well-being. The installation of these structures is a tangible sign of a vision geared towards reducing environmental impact and raising public awareness.
The advantages for citizens are immediate: significant economic savings compared to bottled water, particularly for large families, and easier access to higher quality water. The water supplied, in fact, undergoes additional filtration and treatment processes (microfiltration, activated carbon, UV rays) that remove impurities and improve taste, guaranteeing purity. This availability encourages greater water consumption, which is essential for health, and offers a healthy alternative to sugary drinks.
The positive environmental impact is considerable, thanks to the drastic reduction in the consumption of single-use plastic bottles and the resulting pollution. To ensure the effectiveness and safety of the service, proper management and maintenance is crucial, with regular checks, sanitisation and filter replacement. Water houses are therefore a smart investment, combining economic, environmental and health benefits, helping to build more sustainable and environmentally conscious communities. future of the planet.
The increasing pressure on water resources, aggravated by climate change and pollution, calls for more prudent management. In this context, water dispensers emerge as a concrete solution to reduce the environmental impact of water consumption. These systems offer a viable alternative to traditional plastic bottles, promoting a more responsible and sustainable approach.
By abandoning the use of disposable plastic bottles, dispensers offer a sustainable alternative, encouraging hydration with quality water, often filtered and chilled. Companies like DKR excel in providing these systems, offering customised solutions for offices, schools and communities. DKR's commitment results in a significant contribution to reducing plastic waste and promoting more conscious consumption.
In addition to reducing waste, dispensers contribute to a more efficient management of water resources, minimising waste and ensuring a controlled supply. Technological innovation plays a key role, with advanced filtration systems that improve water quality and constant monitoring to ensure safety. The adoption of these technologies optimises water use and reduces the overall environmental impact.
The effective management of a water dispenser, crucial for ensuring quality water and efficient service, begins with the selection and installation of the most suitable device for the context (office, school, water house), considering capacity, functionality and type of connection. This is followed by the management of consumables such as the periodic replacement of filters and CO2 cylindersplanned to avoid interruptions. DKR offers not only water dispensers, but also a complete supply and maintenance service, ensuring a constant and reliable supply.
Periodic cleaning and sanitising (exterior, contact parts, internal hydraulic circuit) are vital to prevent bacterial contamination. Maintenance, both ordinary (preventive checks) and extraordinary (fault repair), ensures optimal operation over time. It is also essential to monitor the quality of the water supplied, through periodic analyses, to confirm the potability and effectiveness of filtration.
Finally, comprehensive management includes handling user complaints (malfunctions, quality problems) and providing timely assistance. This virtuous cycle, covering every aspect from initial selection to ongoing support, is essential to offer a valuable service, ensuring safe water and user satisfaction. DKR is committed to providing comprehensive support, from complaint handling to quick problem solving, ensuring reliable service and full customer satisfaction.
In the welding wire (MIG/MAG), the shielding gas is essential to isolate the weld pool from atmospheric contamination (in the air we breathe there is 18% oxygen 78% nitrogen and other gases in % less), which would compromise the quality and strength of the weld. The choice of gas or gas mixture depends on the material to be welded, its thickness, the welding position and the desired mechanical properties of the joint. DKR offers a wide range of protective gases for welding and cutting, providing the ideal solution for every need and application.
Inert gases, such as Argon (Ar), do not react with molten metal. Argon, the most widely used, is ideal for thin materials and for welding aluminium and copper, offering a stable arc. Helium (He), more expensive, generates a hotter arc, useful for greater thicknesses and greater penetration, often used in a mixture with Argon. Active gases, such as Carbon Dioxide (CO2) and Oxygen (O2), react with the bath. CO2, is used for carbon steels, providing high penetration but a less stable arc when pure (often mixed with Argon for MAG welds). Oxygen, in small percentages with Argon, stabilises the arc and improves wettability on stainless steels, but an excess can cause oxidation.
In addition to the material, the choice of gas is influenced by: material thickness (heat-transferring gases for thicker thicknesses), welding position (stable gases for complex positions), desired mechanical properties, cost and welding speed. DKR can assist you in choosing the most suitable protective gas for your specific needs, offering technical advice and a wide range of products. Careful selection of shielding gas, coupled with correct welding and cutting parameters, is essential for robust, reliable and high-quality welded joints.
Modified Atmosphere Packaging (MAP) is a key technique to extend the shelf life of foodstuffs. By replacing the air in the packages with specific gas mixtures - mainly carbon dioxide for its antimicrobial properties and nitrogen as a filler to reduce oxygen - microbial growth is inhibited and oxidation is slowed down. DKR offers complete solutions for modified atmosphere packaging, providing food gases certificates and expert advice to optimise conservation processes. This technology is widely used for meat, fish, fruit, vegetables, bakery products and ready meals, preserving their freshness and quality for longer.
Carbon dioxide (CO2) is the key gas for carbonating drinks such as soft drinks, sparkling water, beer and sparkling wine. The process involves dissolving the CO2 in the liquid under pressure, creating the characteristic bubbles upon opening. In addition to effervescence, CO2 improves flavour and contributes to the preservation of drinks due to its mild acidic properties and ability to inhibit the growth of microorganisms.
Liquid nitrogen is used in freezing and blast chilling, as it is at a temperature of approximately -196°C, allowing an ultra-fast freezing process. This method minimises the formation of ice crystals, thus best preserving the texture, flavour and nutritional values of food. Food gases are also used for spraying products such as whipped cream and oils, allowing for uniform application.
The use of food gases is strictly regulated to ensure consumer safety. The gases must have a high purity and comply with specific regulations. DKR guarantees the compliance of its food gases with current regulations, offering certified products and a comprehensive service for the correct handling and use of gases. It is crucial that correct handling and storage procedures are followed, and that operators are properly trained.
La cryogenic cleaningalso known as cryogenic blasting or dry ice blasting, is an innovative and environmentally friendly industrial cleaning method using solid carbon dioxide (CO2) pellets, commonly known as dry ice. This process utilises the unique properties of dry ice to remove contaminants, coatings and residues from a wide range of surfaces without damaging the underlying substrate and leaving no secondary residue. DKR provides 'fresh' dry ice for cryogenic cleaning applications, ensuring optimal performance and reliable service. It is a technology increasingly appreciated for its effectiveness, versatility and low environmental impact.
The cryogenic cleaning process is based on three main physical effects. Firstly, dry ice pellets, projected at high speed from a special machine by compressed air, hit the surface to be treated (kinetic effect). Secondly, the extremely low temperature of the pellets (-78.5°C) causes a thermal shock on the layer of dirt or coating, which contracts and becomes brittle, facilitating its detachment from the substrate. Finally, upon impact, the dry ice sublimates instantaneously, changing from a solid to a gaseous state. This rapid expansion in volume (approximately 800 times) generates a sort of micro-explosion that lifts and removes the contaminant from the surface.
Cryogenic cleaning offers numerous advantages over traditional methods. It is a non-abrasive process, so it does not damage or wear the treated surfaces, making it ideal for delicate materials, precision moulds and sensitive components. As it is a dry and therefore anhydrous method, it can be used on electrical and electronic equipment without the risk of short circuits or damage. Crucially, it produces no secondary residue: the dry ice converts to gaseous CO2 that dissipates into the atmosphere, leaving only the removed contaminating material to be collected. This eliminates the costs and problems associated with the disposal of solvents, contaminated water or abrasive materials. It is also an environmentally friendly method, as the CO2 used is often recovered from other industrial processes.
The applications of cryogenic cleaning are manifold and range across different industrial sectors. It is successfully used in the food industry for the sanitisation of machinery and production lines, in the manufacturing industry for the cleaning of moulds (rubber, plastic, die-casting), equipment and robots, in the restoration industry for the gentle removal of dirt from monuments and facades, in the electrical industry for the cleaning of switchgear and motors, and in the aerospace and automotive industries. DKR supports companies in all these areas, providing not only high-quality carbon dioxide, but also technical advice and customised solutions for the effective implementation of cryogenic cleaning. Although it is a very effective technology, it requires specific equipment and properly trained personnel for safe and efficient use.
DKR produces dry ice from CO2 which comes entirely from biogenic sources or from industrial flue gas recovery. In addition to dry ice, DKR can provide machines for sale, in operating lease mode, in hot hire mode (hire with its own technician) or in cold hire mode (hire without technician).
Yes, in the knowledge that many customers perform industrial cleaning not on a continuous basis, DKR can offer an active cryo-cleaning service throughout Lombardy, including the provinces of Milan, Varese and Como. We intervene directly at your site (onsite service) to ensure maximum efficiency and reduce and eliminate downtime.
Dry ice is carbon dioxide (CO₂) in a solid state at a temperature of approximately -78°C. During cleaning, the dry ice embrittles the contaminant, which is then removed by the combined action of compressed air. In detail, when dry ice comes into contact with the surface to be cleaned, it passes directly from the solid state to the gaseous state (sublimation), removing the dirt without leaving any residual moisture or abrasion.
To receive a quote or to schedule a technical inspection, you can contact us via the form on our website, call our telephone number or write us an email. We will analyse your specific needs and propose the most effective solution.
Via Grigna, 60 - 20027 Rescaldina (MI) - ITALY
Tel. +39 0331 54 94 67 - Fax +39 0331 54 49 01
info@dkr.it - dkr@pec.it
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