Danfoss BOCK® Compressors

Unshakeable stability. Unquestionable quality.

Built on decades of BOCK® expertise and backed by the global strength of the Danfoss ecosystem, Danfoss BOCK® compressors deliver reliable, smooth CO₂ performance for demanding refrigeration applications. Engineered for quiet operation and long-term serviceability, they help OEMs reduce system complexity while minimizing downtime throughout the equipment lifecycle. With comprehensive field serviceability, worldwide CO₂ support, and Danfoss RefCare resources, OEMs gain the confidence, stability, and responsive support needed to keep systems running efficiently in any market.

Danfoss BOCK® compressors set the standard for smooth-running reliability in commercial and industrial refrigeration. Designed with an enlarged 2-cylinder platform and balanced drive system, Danfoss BOCK® compressors deliver exceptionally smooth operation that minimizes noise and vibration while eliminating system instability — even in demanding CO₂ applications. The result is engineered quietness, proven performance, and optimized oil management that OEMs and operators can depend on for long-term operational stability.

From air conditioning to heating, cooling, and refrigeration, Danfoss BOCK® develops efficient, low-GWP and CO₂ compressor solutions that combine performance, environmental responsibility, and cost-effectiveness. Our semi-hermetic hydrocarbon compressor portfolio is designed for long-term compliance with fluorinated gas regulations, while our lightweight aluminum mobile compressors help improve energy efficiency and environmental compatibility across buses, trains, and transport refrigeration systems.

Backed by decades of expertise, Danfoss makes CO₂ simple. OEMs and operators benefit from global technical support, application expertise, and comprehensive after-sales service that reduce complexity and support service continuity throughout the system lifecycle.

Explore the Danfoss BOCK® product portfolio to find reliable, quiet, and efficient compressor solutions engineered for long-term performance and confidence in every application.

Proven Performance: Learn how the Danfoss BOCK® CO₂ compressor reduces vibration in our latest whitepaper...

Danfoss BOCK® compressors deliver an average of 83% vibration reduction for transcritical CO₂ supermarket refrigeration systems, optimizing energy efficiency, reliability, and performance. Read the full whitepaper now to learn more.

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Proven Performance: Learn how the Danfoss BOCK® CO₂ compressor reduces vibration in our latest whitepaper...

CO₂ made simple

Danfoss BOCK® compressors lead the way in global commercial and industrial refrigeration. From air conditioning to heating and cooling, our commitment to a greener future shines through. We've innovated efficient, reliable CO2 and low-GWP refrigerant compressors, ensuring functionality, cost-effectiveness, and environmental responsibility go hand in hand.

As for the semi-hermetic hydrocarbon compressors portfolio, BOCK® compressors are meeting F-Gas Regulations for long-term use.

Our mobile aluminum compressors make vital contributions to environmental protection, creating a comfortable climate in buses, trains, and transport cooling systems. We prioritize energy efficiency and environmental compatibility, focusing on emission-free heat pumps for vehicle heating. Our lightweight, robust compressors enhance overall system efficiency.

Deep dive into the product range to find the solution matching your application needs.

Compressors for stationary applications

The sustainable choice for all your HVAC-R needs with BOCK® semi-hermetic compressors from Danfoss. Our compressors lead the industry in commercial and industrial refrigeration, spanning air conditioning, heating, cooling, heat recovery, and heat pumps.

We are committed to a greener future, innovating efficient and reliable CO₂ and low-GWP refrigerant compressors that combine functionality, economic efficiency, and environmental responsibility.

Explore the features and benefits, including natural refrigerants, CO₂ applications, ATEX HC models, versatility, efficiency, reliability, and eco-friendliness. Welcome to the sustainable world of Danfoss BOCK® compressors.

Product range - Stationary applications:

Semi-hermetic low-GWP compressors: HG LG-series

Explore Danfoss BOCK®'s LG compressor range, designed for low-GWP HFO refrigerants, delivering reliable, efficient, and eco-friendly cooling solutions. With global regulation compliance, specialized technology, and a comprehensive range, trust in our decades of expertise for sustainable refrigeration and air conditioning

Semi-hermetic compressors: HG and HA-series

Explore Danfoss BOCK®'s HG and HA compressor ranges, offering exceptional cooling efficiency and reliability. These compressors are designed for various refrigerants, feature improved efficiency, compact design, and energy savings, making them versatile solutions for refrigeration, air conditioning, and more.

Semi-hermetic ATEX compressors: EX-HG-series

Danfoss BOCK® leads in ATEX/IECEx compliant compressors for explosive atmospheres in zones 1 and 2. Our semi-hermetic HG series compressors offer explosion-proof reliability, stringent quality standards, and customer-centric solutions, ensuring safety and efficiency in hazardous environments.

Semi-hermetic hydrocarbon compressors: HG HC-series

Experience the natural choice in refrigeration with Danfoss BOCK®'s hydrocarbon compressors. Designed for efficiency and sustainability, these compressors offer a reliable, long-life design with a wide and safe operating range. Optimize your total cost of ownership and embrace eco-friendliness in applications like supermarket refrigeration and chillers with BOCK® HC compressors.

Semi-hermetic CO₂ compressors: HGX CO₂-series

Discover Danfoss BOCK®'s eco-friendly excellence with semi-hermetic CO₂ compressors. Our commitment to sustainability means efficient and reliable solutions for commercial and industrial refrigeration, air conditioning, heating, and more. Choose from versatile, high-pressure, and specialized compressors that meet environmental standards while ensuring peak efficiency and operational reliability

Compressors for mobile applications

Danfoss BOCK® mobile aluminum compressors are at the forefront of eco-friendly climate control. They play a vital role in creating a comfortable atmosphere in buses, trains, and transport cooling.

Today's air conditioning systems prioritize passenger comfort, energy efficiency, and environmental compatibility, focusing on emission-free heat pumps for vehicle heating.

Our compressors excel in these areas, being lightweight and robust, enhancing overall system efficiency. They offer features like efficient thermal management, the use of eco-friendly refrigerants (CO₂ and low-GWP), and reliability.

Product range - Mobile applications:

Semi-hermetic aluminium compressors for mobile use

Discover Danfoss BOCK®'s innovative HG-series aluminum compressors, designed for mobile refrigeration. With a lightweight design, improved performance, space efficiency, and enhanced safety features, these compressors are ideal for bus air conditioning, electric applications, and railway transportation systems.

StarCO₂mpressors for electric buses and trains

Introducing Danfoss BOCK®'s CO₂ StarCO₂mpressors HR40 and HR60, revolutionizing electric bus and train air conditioning. Experience space-saving, eco-friendly cooling with proven reliability and robust construction. Achieve sustainability, innovation, and extended vehicle range for a greener future.

FK series - Vehicle compressors for mobile cooling

Discover Danfoss BOCK®'s FK series compressors, the result of decades of expertise and innovation. Lightweight, robust, and versatile, these compressors excel in bus, rail, and transport cooling. Trust in the proven reliability of the FK40 and the series' ongoing adaptation to diverse refrigerants and application needs.

Semi-hermetic CO₂ compressors: HGX CO₂-series

Compressor Selector

BOCK® Compressor Code Finder

Locate your Bock compressor code by searching with its legacy Bock ID or by using the attribute selectors.

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Case Studies

Hugo the compressor, our work horse since 1955

Still fit, with over 160,000 operating hours behind it: Hugo the compressor purrs like it did on the first day. Hugo is an HK2C type semi-hermetic compressor, built in 1955. It has one cylinder and runs at 1,450 revolutions per minute. It is named after Hugo Bock who, together with company founders Wilhelm Bock and Erich Etter, was managing the company when Hugo was built.

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Hugo the compressor, our work horse since 1955

Videos

Webinar: Optimizing CO2 Industrial Heat Pump Application Performance

How to service and replace a heat thermostat on a BOCK® compressor

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Learning

Boost your skills with our quick intro to the Danfoss BOCK® portfolio

Learn to identify key compressor groups for refrigeration, transport cooling, and more. Sign up now and get confident fast!

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Danfoss BOCK® compressor training

Software

Compressor selection tools - VAP

The VAP tools are ideal for finding the appropriate compressors or units for stationary and mobile applications. By inputting the required refrigerating capacity and operating conditions, the tool will display compatible components right away. In the VAP tools you will also find additional details about the suggested compressors.

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