Find the world's verified natural refrigerant companies.

SINTEF is the largest independent research organisation in Scandinavia. Its Energy Research department offers solutions and services for CO₂ Technology in refrigeration, mobile air conditioning, and heat pump systems. Since 1950, SINTEF research has created solutions and innovation for society and for customers around the globe. This has made SINTEF a world-leading research institute. The SINTEF foundation is a non-profit research foundation. Its purpose is to contribute to the development of society by carrying out research in the natural sciences, technology (including construction and civil engineering), and health and social sciences in collaboration with the Norwegian University of Science and Technology, hereafter called NTNU. The purpose is realized through the development of own expertise at the highest level and a close collaboration with NTNU, and in collaboration with business, administration and other research and educational institutions.

GTS manufactures R290 and R600a natural refrigerants with a sustainable CO₂ footprint, through a distillation plant using R290 HEAT PUMPS and powered by a 1MW solar plant. By reducing our “Scope 3” emissions, we make the world greener and more efficient with GTS refrigerants. GTS, a ‘QUIRIS Holding Industriale’ company, works in the sectors of production and distribution of special, technical and pure gases. GTS carries out its activities in different sectors such as the aerosol industry, refrigeration, construction, food and many other fields. Thanks to its total control of the supply chain of n-butane, isobutane and propane and the exclusive distribution of propylene with a high degree of purity, GTS is a leading company in the production and sale of special gas-based products. GTS produces more than 25,000 tons per year of natural refrigerant gas, including: R290, R600A, R600 and R1270. The company has 5 branches in Italy, Belgium, Romania, Brazil and Thailand, and is able to supply its products all over the world in its own trucks, isotanks and cylinders, to avoid contamination and assure top quality. RANGE OF REFRIGERANT GASES GTS refrigerant gases are divided into specific categories for particular needs, according to their use and sector of application. Polarpure R600A refrigerant gas. GTS pure isobutane is used primarily for domestic refrigeration (fridges and freezers). The product is also suitable for particular applications such as LNG plants, power stations etc. Polarpure R290 refrigerant gas. GTS pure propane is the most widely used product in air conditioning systems, in commercial freezers and fridges, in ice-making machines, in bottle fridges, in vending machines and in cascade refrigeration systems for supermarkets, etc. This gas is the best ecological alternative to environmentally harmful R134a. Polarpure R1270 refrigerant gas. GTS polymer-grade propylene (99.5%+) is also used as a refrigerant. Polarpure R433A, R433B, R433C refrigerant gas. GTS polymer-grade pure propane and propylene (99.5%+) mixtures are used as refrigerants. Polarpure R600 refrigerant gas. GTS pure n-butane can be used alone or as a component in a mixture. GTS S.p.a. has successfully completed the 2025 ATMOsphere Label process and has been approved as a best-in-class natural refrigerant gas manufacturer for the second year in a row.

Henry Group Industries prides itself on being a worldwide leader in the Commercial Refrigeration and Air Conditioning market. With a history spanning over a century, Henry Group has established itself as a respected competitor in the industry. Founded in Chicago, Illinois in 1914 by Guy Henry, the company initially produced gas lanterns and accessory gauges for Model T Ford automobiles. By the end of its first decade, Henry had entered the refrigeration market, creating our first globe and angle valve as well as filtration and dehydration devices for refrigeration systems. Today, with Headquarters in Hong Kong, Henry has evolved into a truly international manufacturer with operations in Australia, China, Singapore, the United Kingdom, and the United States. The Henry Group is being re-engineered to transform regional platforms into a single sustainable global platform manufacturing and developing high quality CO₂, R717 and HC compatible, catalogue and customised products, compliant with the requirements of CE, ASME, UL and AS1210 and TSG. We invite you to explore our world.

Danfoss Climate Solutions, engineers energy-efficient heating and cooling solutions to help the world build a better future. Their innovative products and solutions enable a decarbonized, digital, and more sustainable tomorrow. With a strong foundation in quality, people, and the climate, They drive the transition in energy, refrigerants, and food systems to achieve global climate and energy goals. As refrigerant regulations evolve, they recognize the challenges and uncertainty this brings. Danfoss is here to provide clear guidance and trusted expertise, so you can make informed choices about refrigerants for your HVACR applications. With their products and solutions, institutional expertise, and digital tools, you’ll find reliable support to stay compliant and equipped to meet the needs of today’s changing refrigerant landscape. Danfoss knows refrigerants, and they’re dedicated to helping you succeed. Whether working on new installations or retrofits, Danfoss is committed to supporting you every step of the way as your partner in sustainable refrigerant solutions.

“OCS COLD has always been very focused on the environmental issues and carries on continuous research for the development of components for applications with natural refrigerants such as R744, convinced that represent the future of refrigeration systems. The company’s mission is supply high efficiency components designed also for an environmental-friendly use. The product range include LIQUID RECEIVERS, LIQUID SEPARATORS, OIL SEPARATORS, SUCTION AND DISCHARGE MANIFOLDS, OIL RECEIVERS with working pressure up to 140bar.”

Güntner is a globally recognized leader in heating and cooling solutions, with over 90 years of engineering expertise. Headquartered in Munich, the company plays a vital role across various industries: from preserving food and regulating building temperatures to enabling renewable energy systems. Güntner’s approach blends everyday technical precision with a strong vision for the future, rooted in innovation and adaptability. The company specializes in high-performance heat exchangers, including air coolers, condensers, dry coolers, and gas coolers, designed for efficiency and durability in demanding applications. Sustainability is a core principle for Güntner. The company is deeply committed to environmental responsibility, integrating renewable energy and efficient water treatment systems across its manufacturing facilities. Its unique “Planted Plant” concept—bringing greenery into industrial workspaces — reflects a broader goal of creating healthier, more balanced environments. All Güntner systems are designed to operate with minimal energy and water consumption, helping to protect natural resources and reduce environmental impact. With a presence in over 50 locations and six manufacturing sites worldwide, Güntner combines global reach with local responsiveness. Its expert teams deliver highly customized solutions tailored to the specific needs of each partner, fostering long-term collaboration and trust. Through engineering excellence and a steadfast commitment to progress, Güntner continues to shape the future of thermal management and sustainable cooling technologies.

Hillphoenix’s mission is to provide fresh, innovative customer-centric solutions that help our customers stay relevant and competitively differentiated. This vision inspires Hillphoenix to become the recognized global leader in creative, flexible and responsible innovations in food retail and industrial refrigeration. As the leading North American manufacturer of CO₂ equipment, our experts have years of experience dealing with ever-changing regulations from the extensive number of over-lapping regulatory agencies. We make compliance easy to understand and implement, have earned eleven consecutive EPA GreenChill Store Certification Excellence Awards and have educated over 37,000 industry professionals and organizations on natural refrigeration systems. We are a preeminent refrigeration supplier with over 12,000 food retail and industrial CO₂ system installations globally.

Mueller Streamline Co., subsidiary of Mueller Industries, Inc. (NYSE:MLI), is an integrated manufacturer and distributor of piping systems solutions. The company’s flagship products include Streamline copper tubing, line sets, fittings, valves, and related items for Plumbing and HVACR applications. Mueller Streamline Co.’s offering also includes Streamline XHP tube and fittings as well as multiple lines of ancillary products including a ball valve series designed by Mueller Refrigeration to address the market requirements for operating pressures and temperatures above the critical point for CO₂. Mueller Refrigeration, another subsidiary of Mueller Industries, is a global leader in the design and manufacturing of premium-performance valves, protection devices and brass fittings for the commercial HVAC/R industry. While maintaining industry certifications, such as UL, cUL and CE, the company also offers RoHS compliance for an extensive line of products. Mueller Refrigeration’s sophisticated in-house engineering and lab resource capabilities allow for continuous improvement of existing products while addressing new product development and innovations. The company specialises in finding solutions to our customers’ most complex HVAC/R problems and applications.

Eliwell has been delivering control systems and services for commercial and industrial refrigeration and air-conditioning units for more than 40 years, with ground-breaking products packed with state-of-the-art technology. Eliwell is the Schneider Electric group center for HVAC-R applications. It designs, develops and produces: Commercial and industrial refrigeration unit solutions and control systems. Air-conditioning controllers, in partnership with the industry's top specialist producers. As well as its world-leading standard range, Eliwell has impressive capability for customized solutions and design and advisory services during design and installation, the basis for sound partnerships with elite international players since 1980. Since 2014, membership of the Schneider Electric group has reinforced this leadership. Today, Eliwell, along with Schneider Electric, is the global partner that provides efficient and sustainable solutions and services for food preservation and distribution systems dedicated to environmental comfort for an integrated asset control.

Castel is active in the refrigeration & air conditioning fields in more than 90 countries. Castel’s commitment to the environment takes it to offer innovative HC products that satisfy its customers while respecting the environment. Castel presents its new 3-Way Motorized Ball Valve and 3-Way Hand Valves series 66 for subcritical and transcritical CO₂ systems, with a maximum operating pressure of 80 to 140bar. Connections are made of AISI 304 steel, of 22mm to 42.2mm, permitting butt welding. The brass body of the valve is appropriately scaled. Use of a brass cap permits access to, and protection of, the maneuvering rod and guarantees an excellent hermetic seal. Its overall dimensions remain compact. Castel presents a preview of its new range Solenoid Valves for HC refrigerants, ATEX conformity for use in EX Zone 2. Nominal Capacity R290 from 3 kW to 200 kW. For the normally-closed solenoid valves manufactured in compliance with the ATEX Directive (valves with an “EX” suffix).

Foshan LYD Energy Saving Technology Co., Ltd. located in Foshan City, is a high-tech enterprise focusing on research, design and produce CO₂ (R744) Heat Pump and offer comprehensive energy-saving solutions. Working with senior technical consultants from China and Italy, LYD well positions itself in the Natural refrigerant CO₂ (R744) segment, its products involve water source or and air source CO₂ heat pump water heater, CO₂ heater pump air heater up to 120℃ and 120℃ Steam Grow R600a Heat Pump With strong R&D strength, LYD is doing continuous development on the Heat Pump Technology, and supplying earth-friendly and people-friendly products with innovation. Reliable, Responsibility, Sustainable and efficient are LYD’s main mission. LYD’s complete product line: Air Source CO₂ heat pump range 8KW~1MW Water Source CO₂ heat pump range 8KW~1MW Cooling and heating CO₂ heat pump range 75KW~250KW CO₂ heat pump air heater range 8KW ~250KW Ultra high temperature HFO heat pump range 75KW ~260KW up to 150°C R290 heat pump, air source or water source 70~120KW R600a heat pump, up to 120°C.

SANHUA – High Quality with Maximum Reliability! For four decades, SANHUA has stood for innovation, quality, and sustainability in refrigeration and air conditioning technology. With 40 years of experience, SANHUA is now one of the world’s leading manufacturers of HVACR controls and components. Comprehensive Solutions for the HVACR Industry SANHUA offers a wide range of products for commercial refrigeration, including high-quality thermostatic and electronic expansion valves, solenoid valves, controllers, pressure sensors, heat exchangers, and much more. Our product range is optimized for natural refrigerants such as R290 (propane), R744 (CO₂), and HFO refrigerants, meeting the highest standards of efficiency and sustainability. Sanhua’s brazed plate heat exchangers (BPHE) are known for their high heat transfer efficiency and low pressure drops. They are suitable for a wide range of refrigerants, including flammable ones, and offer high reliability. Sanhua’s heat exchangers are ideal for use in heat pumps, chillers, and heating circuits, contributing to optimized system performance. Products of Sanhua have passed many international and domestic safety certificates such as CQC, CE, TüV, UL, VDE, and have gained the trust and satisfaction of customers with reliable and continually improving quality. Sanhua’s mission is powered by innovation, precision, and sustainability — developing technologies that optimise system efficiency, reduce environmental impact, and support the industry’s shift toward smarter, cleaner cooling solutions.

Since 2012, Enerblue has been designing and manufacturing heat pumps with natural refrigerants, but their history has much deeper roots. They were born craftsmen, but they never stopped believing in the importance of finding the right solution for each customer. That's why flexibility, safety, and quality are still Enerblue's most important values today. The in-house production of the pipes that composes the refrigeration circuit and the know-how gained over time make their heat pumps and chillers the safest on the market. Enerblue's heat pumps and chillers with natural refrigerants bear 10 years of vision, innovation and expertise into the commercial and industrial applications. Collaboration with Norwegian partners has stimulated them to develop heat pumps designed and optimized to operate down to -20°C. The reliability and efficiency of their units are guaranteed by tests conducted inside the climatic chamber at our production site. The climatic chamber is equipped with all the safety features to test units with refrigerants of category A2L and A3. It is suitable for testing both air/water units and water/water units for heating, cooling, and heat recovery circuits with temperatures from -15°C up to +90°C. Enerblue product catalogue includes chillers with natural refrigerant R290 to meet cooling requirement of up to 760kW. For the heating and high-temperature domestic hot water application, they produce heat pumps with powers ranging from 20 to 350 kW that use natural gases R290 or R744.

Copeland is a global climate technologies company that is engineered for sustainability. For over 100 years, Copeland has been leading the industry with innovative solutions for heating, air conditioning, refrigeration, thermostats, and controls. Sustainability is no small ambition. That’s why Copeland is built for action on a global scale. Everything we do is geared toward a more sustainable future—for our generation and all those to come. Through groundbreaking innovations, HVACR technology and cold-chain solutions, Copeland is reducing carbon emissions and improving energy efficiency in spaces of all sizes, from residential to commercial to industrial. Copeland create sustainable residential, commercial and industrial spaces through HVACR technologies. We maintain the integrity of goods throughout the cold chain. And bring comfort to people globally.

Zudek is a company based in Trieste, Italy, that designs, engineers and manufactures energy-efficient industrial refrigeration solutions using only natural refrigerants, in most cases ammonia. The products come as compact, plug and play, low charge units, very easy to transport, install and start up. Its range of products comprises of: – Water/ammonia absorption chillers, where heat is recovered to produce precious subzero cooling power down to temperatures of -60 °C; – Ammonia air-cooled and water-cooled chillers working with vapour compression refrigeration cycles; – Ammonia heat pumps that can reach temperatures of +90 °C, promoting industrial electrification and decarbonisation policies; – Ammonia abatement systems (scrubbers) that can be integrated on the units or remotely installed next to an existing refrigeration plant; – Electrical control panels, pressure vessels, metal carpentry, connection lines, pumping skids, etc. Zudek solutions are suitable for industrial, civil and commercial applications, having its main references in the food and beverage industry, but also in HVAC applications, and other industries such as plastics, pharmaceutical, chemical and deep freezing ones. All Zudek’s units are remotely managed 24/7 from Zudek’s remote control room, which allows to constantly optimise the operational parameters of the unit, to guarantee the highest energy efficiency and energy savings. Zudek’s solutions are available according to PED or ASME codes. The company is certified ISO9001:2000 by the SGS institute. ZUDEK has successfully completed the 2025 ATMOsphere Label process and has been reapproved as a best-in-class natural refrigerant equipment manufacturer for the fourth year in a row.

For more than 80 years, Baltimore Aircoil Company has been a global leader of innovative evaporative cooling and heat rejection solutions that not only provide substantial energy savings for its customers, but also conserves precious natural resources. Title 24 compliant. Leading the Marketplace in Evaporative Cooling Wherever people live, work, play or learn, Baltimore Aircoil Company is there. BAC makes custom-specific evaporative cooling solutions to maximize energy-efficiency for HVAC, Industrial, and Refrigeration marketplaces. Watch to learn more about BAC’s history, company culture, and dedication to customers’ needs around the world.

Biaggini Frigoriferi was founded in 1928. The company is situated in Cadenazzo, Switzerland and specialises in the field of commercial and industrial refrigeration. Biaggini’s services include designing, planning, production, installation, optimisation and maintenance of cold storage facilities, supermarkets, heat recovery, air conditioning and heat pumps. Biaggini Frigoriferi is a member of Kältering AG, the main Swiss coordinating group that unites eleven major refrigeration companies in their purchasing and selling activities. Since 2010 the company started to use R744 with transcritical configuration in commercial installations. Today the company manages more than 50 plants built and assembled by themselves. Biaggini Frigoriferi has been manufacturing and installing several integrated racks, which are becoming the standard for all the Swiss supermarkets. These racks are suitable for outdoor installations as well. Biaggini is designing and installing R744 reversible chillers and heat pumps as well. The company is also increasing the range of applications for CO₂ from very small installations, up to large industrial plants (more than 600 kW).

Proven and reliable refrigeration and air conditioning technology The demand for quality is implicit today. This also applies to proven, high-performance products with a long service life and excellent price-performance ratio. You can take this for granted with most suppliers. But what do you receive when you also need a rapid solution? What if your technical requirements need a production modification? Or if you require just a little bit more? One way or the other, you should come to us. DEKA controls offer wide, complex development expertise for standard products and tailor-made modifications. Thanks to our lean corporate structure with rapid response times, we precisely offer the technology you require for your product. When you contact us, you will speak directly to the engineers in charge. You will have direct access to technology “Made by DEKA”. Come to DEKA controls directly. Your first-choice partner. DEKA controls offer you: A product portfolio that has stood the test of time Leading technology High-quality materials Reliable construction and design Precision production technology Easy to install Reliable products and advisory service DEKA controls stands for: Over decades of proven experience in the refrigeration and air conditioning industry Rapid and customized solutions Direct access to our support team Simple procedures: one process, one contact person Sales without complex procedures Collaborative attitude towards customers and suppliers Excellent partners and employees with a high level of competence

Expert in hydrocarbon chillers Secon specialises in integral systems for environmentally friendly and energy efficient refrigeration. Chillers employing natural refrigerants are the main focus, especially hydrocarbons. Secon was founded in 2010 aiming to manufacture chillers solely on the basis of natural refrigerants and pioneered the use of hydrocarbons. Throughout the German-speaking region, Secon has proven to be an innovating force of this expanding market segment. Thanks to its project-specific design premise and flexibility to individually adapt each machine, Secon is always the first choice when it comes to quality and efficiency. Furthermore, each Secon manufactured unit is provided with a comprehensive and tested safety concept that ensures the safe use of flammable refrigerants. Innovation and sustainability Energy efficiency as well as minimal environmental impact, down time and life cycle costs are the top design criteria for the products. Secon thus, without exception, uses natural refrigerants such as propane (R290), propene (R1270) and Isobutane (R600a). Secon also offers subcritical CO₂ (R744) refrigeration systems and machines with air cycle technology (R729). Present-day awareness of the harmful implications of synthetic refrigerants makes imperative that they may only be employed where no viable alternative technologies with natural refrigerants are yet available. Secon defines as its entrepreneurial responsibility to minimise the consequences of refrigeration technologies for the environment and future generations, therefore manufactures its products for the most environmentally friendly and safe use as possible. For Secon, this comprises to consistently contribute through research and state of the art technological development. Choice of refrigerant mainly depends on project-specific application and installation location. Hydrocarbons have no ozone depletion potential (ODP = 0) and negligible global warming potential (GWP < 1). There is a near-unlimited supply, they are cost-effective and absolutely future-proof. Hydrocarbon refrigerants are synonymous with high energy-efficiency which contributes to the reduction of operational costs and indirect CO₂ emissions. Hydrocarbons are used safely with the appropriate plant system design. Secon‘s products‘ safety standards are recognised in current norms and technical guidelines. Secon was one of the first companies to develop production-ready hydrocarbon chillers and enter the market. Its engineering consistently aims to reduce refrigerant charge sizes. Secon is one of the few companies to offer chillers with up to four separate refrigerant circuits. The safety concept is developed in house an applied to all chillers with flammable refrigerants; it ensures safe plant operation for the whole range of applications. For Secon, it is not just a phrase to consistently further technological development but a self-evident premise for success. Secon offers significantly more than outstanding products. Facilitating a project-specific design process, Secon consults its customers throughout the early phases of planning and integral system design, e.g., on how to approach safety, hydraulic implementation and application for government financial assistance. After-sales customer support of Secon is provided for commissioning as well as regular service and maintenance. SECON has successfully completed the 2024 ATMOsphere Label process and has been reapproved as a best-in-class natural refrigerant equipment manufacturer for the third year in a row.

Since its establishment in 1987, Nihon Netsugen Systems has been one of the leading companies for large-size heat pumps and industrial refrigeration. In 1999, Nihon Netsugen Systems started a partnership with GEA in Germany. In 2012, Nihon Netsugen Systems began R&D of CO₂ condensing units. The main objectives were to obtain stable operation in hot summer climates and provide energy savings on an annual basis. In 2015, the first CO₂ condensing unit named the “Super Green” was launched in Japanese market. Now Nihon Netsugen Systems is a leading company of CO₂ units in the Japanese market. The main factory is located in Shiga, near Kyoto. The factory always welcomes visitors to share natural refrigerant trends. “We believe in science.” Nihon Netsugen continues to play an active role in achieving SDGs and carbon neutrality by further promoting the Super Green series. Nihon Netsugen Systems has successfully completed the 2025 ATMOsphere Label process and has been approved as a best-in-class natural refrigerant gas manufacturer for the second year in a row.

TEKO has been successfully active in refrigeration technology for over 40 years and offers innovative refrigeration solutions for food. Based on its many years of experience in food refrigeration, the company has specialized in standardized series products for various applications for the cooling of fresh goods. This includes retailing, logistics, food production and commercial refrigeration. TEKO offers multi-compressor systems, high-quality refrigeration components from exclusive partner companies and control electronics from Wurm Systeme and combine this with the broad range of specialist expertise and in-depth product knowledge of our qualified and dedicated employees. This way, the company’s customers receive a fully integrated package meeting the highest standards from a single source: Well-grounded solutions, reliable systems “Made in Germany”, perfectly adapted components and a comprehensive control system with software packages – rounded off by suitable training courses for refrigeration companies and operators. TEKO offers original equipment manufacturers a wide range of high-quality “just in time” refrigeration components. The company’s main focus is on innovative and future-proof refrigeration systems with natural refrigerants. It has been intensively involved with the natural refrigerant CO₂ since 2004 now and already have several thousand proven CO₂ systems on the market, operated by convinced customers. As an internationally active company, TEKO is represented by subsidiaries and affiliates in Europe and Asia. For the Asian market, we manufacture the refrigeration units – developed and designed in Germany – locally in Bangkok / Thailand. TEKO Refrigeration has successfully completed the 2024 ATMOsphere Label process and has been reapproved as a best-in-class natural refrigerant equipment manufacturer for the third year in a row.

With its origins as a manufacturer of tailor-made refrigeration units since 1992, compact Kältetechnik has continuously grown and expanded its manufacturing facilities to satisfy the demands of its clients. The company has a forward-thinking strategy, keeping up-to-date with the latest trends in refrigerants and technology. They manufacture refrigeration systems for almost all applications – with all common synthetic refrigerants as well as the natural refrigerants CO₂, NH3, Propane, etc. Compact operates on about 5,700 m² production and storage area with a total of around 110 employees. Sustainability and energy-efficiency of refrigeration systems are a very important criteria in the project consulting when it comes to finding solutions. Especially, the use of CO₂ as a refrigerant (R744) has increased significantly in many applications. With the GWP of 1, all cooling requirements can be met safely, efficiently and in compliance with all the applicable standards and laws. The compact carbo-series includes a wide portfolio of CO₂ units. Whether booster system, gas cooler unit, water chiller or heat pump – for many applications it‘s a perfect solution. Since 2005, several thousand CO₂ systems have successfully been in use. Therefore they offer a special training program for partners and customers to get them to the system technology, too. compact Kältetechnik product range: Compressor units and compressor racks Supplementary equipment Chillers Heat pumps Technical Support

Howe Corporation has been in the ice making business since 1912 and has been manufacturing equipment using natural refrigerants since the beginning. Back then, most of the company’s refrigeration equiptment was operating on ammonia. As blended HFC’s were introduced, Howe adapted to making ice flakers using HFC’s while keeping its roots in ammonia. With the relatively recent introduction of CO₂ systems, Howe was the first ice machine manufacturer to design ice flakers to operate in secondary as well as sub & transcritical CO₂ systems. In addition to Howe’s 2000-pound (908 kg) through 20,000-pound (9080 kg) ammonia models, its has CO₂ flakers with production from 1000 pounds (454 kg) up through 6000 pounds (2724 kg) daily ice production. Contact Howe Corporation to discuss all your flake ice needs.

ESK’s standard products are available from stock at short notice and in more than 50 countries by mostly long-standing trading partners. Above all, however, ESK has been an original equipment manufacturer (OEM) for major system companies in the supermarket refrigeration, transport refrigeration and heat pump sectors for many years. This enables the company to optimally combine traditional ESK qualities such as delivery reliability, reasonable storage concepts, high material and manufacturing quality together with excellent consulting competence and superior customer orientation. An extensive range of materials and automated manufacturing processes enable production to customer specifications. The selection of components ranges from 0.3 litres to 400 litres volume with different pressure levels up to 130 bar. The main theme is green – Special product lines for widely used natural refrigerants The high working pressures, gas velocities and also the special properties of CO₂ as a refrigerant place special demands on the selection of materials and welding processes to ensure the required product safety. ESK offers all components in an outstanding quality, especially with regard to the execution of the flange connections and the welding seams. ESK’s product range enables the selection and dimensioning of entire oil management systems: Oil separators Oil reservoirs and combined oil separator-reservoirs Oil level regulators suitable for all common compressors Oil and liquid level sensors Suction line accumulators Liquid receivers Discharge line mufflers Strainers Filter driers Valves, adapter sets and more Contact us to learn what we can do for you! Find the ESK product catalogue here