The foundations of our company were laid by József Gyenese, who tirelessly and enthusiastically always sought innovative technical solutions. During his career, he served as chief engineer at the iconic Rába factory in Győr, technical director at the Rekard gear factory, and development project engineer at the Vienna University of Technology. He is credited with introducing bevel gear manufacturing at Rába, developing gear and planetary gear systems, and introducing welding robots to Hungary through the IGM Rekard collaboration. From there, it was only a small step to screw compressor technology. The current owner and managing director of the company is Tamás Gyenese.
A film showcasing the professional career of József Gyenese, founder of Denv-Air Kft.
In Vienna, he met GardAustria, and together they founded Gard-Air Kft., which became the Hungarian representative of the global company Gardner Denver.
During the period of regime change, they installed numerous Gardner Denver compressors for many large Hungarian companies, thereby establishing the brand’s strength in Hungary. His son and daughter joined the company after completing their university studies, and in 1998, concurrently with the establishment of the Budapest site, the company was reorganized and continued its work as DENV-AIR Kft., now with 100% family ownership. The current owner and managing director of the company is Tamás Gyenese.
As the brand representative for Gardner Denver, we have continuously provided sales and professional service tasks with nationwide coverage.
Even in the 90s, Gardner Denver was committed to energy saving, and with Turn-Valve technology, we uniquely achieved 20-25% energy savings by opening windows beneath the screw rotors in the compression chamber during partial load, allowing less air to be compressed and recirculating the excess to the intake. This energy-conscious approach has remained a defining factor in the development of our new compressors ever since.
From the 2000s, we began building our own brand, first with the MODULO and ENERGY families, and then, in collaboration with another innovative Italian company, we introduced the DENV-AIR RVG, RVK, and RVD screw compressor families to the market. This was followed by the DENV-AIR MDVN and MDVS mobile compressor families, with which we successfully entered the Latin American market.
For our patent called LÉGÁGY (Air Bed), which was patented in most parts of the world, we developed a special small compressor and started its production at our Győr site in 2005. With this compressor, the hardness of the bed can be adjusted according to users’ daily comfort needs, using a remote control while lying down.
Due to increasing international trade demands, we sought new development opportunities. We worked extensively with Italian developers to understand and perfect inverter (variable speed drive) technology. We realized that only compressors designed from scratch to be compatible with this technology, featuring a special motor and drivetrain, could be the equipment of the future. Only then could the regulation be reduced from 100% to as low as 25%. The problem of motor cooling at low speeds became a significant development area, as did the design of bearings for inverter technologies. Based on practical experience, we have incorporated insulated bearings into the motors of our compressors.
In addition to representing Gardner Denver, which is one of the world’s most significant compressor technology groups, encompassing hundreds of factories and brands (Wittig, CompAir, Elmo Richle, Tamrotor, Bottarini, GD, Champion…), our company is also the importer of STANLEY piston compressors, the representative of the ROTAIR factory, a distributor and service provider for OMI, and the Western Hungarian representative for HONDA small machinery. Thanks to our nationwide service network, we also provide maintenance and service for these devices. For water treatment companies, we manufacture our uniquely developed DENV-AIR sewer cleaning equipment, which uses pulsating compressed air to clear blockages and deposits. Its basic supply is provided by a mobile compressor, and it is equipped with a complete filter line to ensure oil-free operation. Under the name DENV-AIR Limpia Playa, we have also developed sand cleaning equipment capable of cleaning polluted sections of white sandy beaches in the Caribbean. We are proud to say that in Cuba, not only our mobile and electric compressors are known, but almost every Gaviota luxury hotel is our partner, thanks to our professional HONDA gardening machines and sand cleaners.
Based on our extensive experience in assembling unique tank-mounted compressors, we began developing our new compact screw compressor family.
Based on our experience in compressor block refurbishment, we knew that the most ideal design would be one without V-belt or gear drives in the compressors. Manufacturers essentially overspeed the compressor blocks, allowing them to meet specific demands with a smaller block. However, this significantly reduces the lifespan of the block bearings. We wanted to move away from this outdated technology. We sought contact with pioneering developers in the market, and thanks to a state delegation, we established an innovative collaboration with one of our group’s suppliers. Our new partner was developing similar concepts, and we were able to join this activity in a timely manner. The results of our joint development were the prototypes that became the predecessors of our new DAAM and DAPM 100% direct-drive compressor family. Here, the motor rotor was mounted directly on the compressor block shaft, achieving ideal 100% direct drive, eliminating all transmission losses and potential failure points.
To eliminate bearing failures in inverter compressors (as the grease in motor bearings melted in many compressors due to electrical forces, leading to unexpected breakdowns), we brainstormed extensively about whether the rear bearing could be omitted. In our partner’s block developments, there was a solution where if a motor half as long but with an increased diameter was used, the bearing at the compressor block would be sufficient. We chose this block solution, and time has proven us right. The motor bearings could thus be completely eliminated, removing another significant potential point of failure. Our new motors are now completely maintenance-free!
A 3-year testing and refinement phase followed, during which we tested the prototypes at our customers’ sites as units of our rental compressor fleet. This value analysis method formed the basis of the development. Thus, we solved with a single magnetic valve at the intake what used to be controlled by three valves, replaced all hoses with metal pipes to reduce the possibility of failure, eliminated V-belt pulleys, gear drives, and clutch mechanisms. The equipment received modern, colorful, touchscreen control panels similar to mobile phones, and with magnetic side doors, we made the machines serviceable in minutes, whereas previously, our market competitors made them almost impossible to disassemble with 8-10 screws per side.
Furthermore, DAPM compressors are now equipped with the most modern Permanent Magnet motors, achieving an additional 2-8% energy saving, on top of the already significant 30% energy saving attributed to variable speed drive technology. Based on the experience with our test machines, our users, according to their specific power consumption measurements, consumed approximately 40-45% less energy than with their old fixed-speed compressors. We concluded this testing period with complete satisfaction and were able to launch the market introduction.
For the external design of the compressor, we commissioned Gergely Bogányi, a Golden Drawing Pin award-winning graphic designer, who created an incredibly dynamic and modern design with sharp, cut edges. For the color scheme, the BMW design team’s R1200 RS motorcycle provided the inspiration. Thanks to Gergely’s work, our compressors received an incredibly modern style, with cut white side surfaces, black lower inserts, and bold wedge-shaped red accents, which made the appearance very dynamic. We were very satisfied with the graphic designs; we had never seen such a beautiful compressor on the market before.
Based on a European Union tender, we built our new manufacturing hall where we assemble our compact compressors. Our company jointly developed the tank with a Hungarian manufacturer, resulting in a much more stable unit compared to market competitors, which can be easily forklifted from all sides and moved with a hand pallet truck. We specifically reinforced the areas where lifting and moving points are located, modifying them based on our risk assessment.
We were surprised to find how unstable and only side-liftable tank solutions other manufacturers use, which means their compressors cannot even be loaded into a van. Our refrigerated dryers and filters are now manufactured under our own brand name by our long-standing Italian partner. In the assembly of compact compressors, we also use only fixed metal piping instead of the old hose solutions, which gives the compressor a more professional appearance and means our customers no longer have to deal with material fatigue issues of hoses; the equipment’s piping has become everlasting.
We build compressors entirely according to our customers’ ideas, taking into account all individual requirements. Special filter lines, condensate separators, or even unique color preferences can be implemented. Our customers can be present during assembly, monitoring the complete realization of their ideas.
Every completed compressor undergoes an electrical safety test, the documentation of which, along with the compressor’s certification papers, is naturally handed over to our clients.
We are pleased to welcome the end-user for a test run of the equipment, allowing them to test their new compact compressor even before delivery.
As part of perfecting our ISO quality assurance system, we also perform bearing vibration measurements at the end of our quality control process for all our compressors, thus creating a test report on the initial state of each compressor block. This allows us to guarantee that only compressors in 100% perfect condition can leave our company. We also perform vibration measurements at our customers’ sites free of charge every 4000 hours, providing us with precise condition monitoring documentation for our compressors. This enables us to maintain full control over the equipment we sell, monitor the condition of the main unit’s bearings, and thus predict the due date for bearing replacements in advance.
Our compressors are characterized by very low operating costs and favorable service prices.
Our product range currently extends from 5.5 kW to 132 kW, fully covering the compressed air needs of Hungarian companies.
Our foreign trade network covers neighboring countries from Slovakia to Austria, and from Romania to the Czech Republic, but we gladly welcome new resellers. To supply the Latin American market, we have maintained our own office and service team in Havana for over 15 years.
Based on sales over the past 4 years, our compressors can be found throughout Central Europe and Hungary, from small categories to 132 kW industrial solutions. To the complete satisfaction of over 400 customers.
Thanks to our investments, we keep approximately 60-80 manufactured compressors in stock, from 5.5 kW to 75 kW, to serve our customers immediately, even with 55-75 kW compressors, within one day. We know that speed is often the most important factor.
Our fleet of 40 rental compressors is also unique, allowing us to provide immediate assistance during overhauls. Our vast spare parts inventory and professional service are also at your disposal, enabling us to perform compressor block and motor refurbishments in-house, within extremely short deadlines.
Developments in recent years:
Future developments:
You can try it out now! Our new DAPM “Carbon line” series compressor is available for testing in our Győr showroom. With this compressor, approximately 50% energy savings can be achieved if your operation’s compressed air usage is variable. Don’t forget that with our integrated heat recovery unit, 74% of the invested energy can still be saved. Your new compressor, thanks to its energy savings, can generate its purchase price within 1.5 years.
Stable performance is ensured by state-of-the-art screw compressors, precise system design, and comprehensive diagnostic and service solutions optimized for energy-efficient operation.
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