Semi-hermetic compressors: HG and HA-series

BOCK® HG & HA compressors: Cooling efficiency and reliability revolutionized

Danfoss BOCK®'s HG range offers traditional suction-gas-cooled compressor technology, excelling in ease of operation, low maintenance, high efficiency, and reliability. On the other hand, the air-cooled HA range is specially engineered for low-temperature applications, preventing overheating by air-cooling the motor and cylinder heads separately from the suction gas.

These ranges are available in a variety of low-GWP refrigerants as well as traditional HFCs. Experience a cooling revolution with BOCK compressors, delivering unmatched performance and temperature control.

Features and benefits of HG and HA compressors:

Improved efficiency: enhanced performance and greater displacement stages lead to increased efficiency
Compact design: the compressors feature a more compact structural design for easier integration
Energy savings: advanced valve plate system, latest-generation electrical motors, and improved gas flow reduce energy consumption
Compatibility: redesigned connections align with industry standards, ensuring seamless replacement without adaptation work
Versatility: suitable for various applications, including refrigeration, air conditioning, and supermarket refrigeration

Gas Cooled: HG-series product features (quick overview)

7 model sizes with 25 capacity stages from 5.4 to 281.3 m³/h (50 Hz)
Refrigerants: R448/9A, R513A, R450A, R134a, R407A/C/F, R404A
Proven and reliable oil pump lubrication
Standard footprints
Standard-position sight glass
mexxFlow® 2.0 valve plate system
Newly designed housing with optimized gas flow
Standard-position valves
Highly efficient electric motors of the latest generation
Exchangeable motor
Electric motor protection

Air Cooled: HA-series product features (quick overview)

3 model sizes with 10 capacity stages from 11.1 to 57.7 m³/h (50 Hz)
Refrigerants: R448/9A, R407A/F, R404A
Proven, reliable oil pump lubrication system
Standard mounting position
Standard position sight glass
New designed housing with optimized gas guide
Optimized valve plate system
External fan for motor cooling
Highly efficient electric motors of the latest generation
Replaceable motor

HA principle: Unmatched efficiency for low-temperature air-cooled compressors

Experience cutting-edge low-temperature air-cooled compressors with direct suction operation and efficient motor cooling. Unlike traditional methods, our compressors ensure the suction gas remains unheated by the motor, directly powering the compressor. Thanks to a compact ventilation unit, we achieve precise air cooling for the engine and cylinder heads.

Conclusion:

Controlled gas temp for optimized performance.
Substantial performance boost.
Wider range of versatile applications due to innovative design.

UL recognized

The UL-HGe series seamlessly integrates the time-tested advantages of the suction gas-cooled HG series with rigorous safety standards tailored for the US and Canadian markets. These UL-recognized semi-hermetic compressors, expertly refined by Danfoss BOCK®, are a testament to energy efficiency, robustness, and compact design. Engineered for versatility, the UL-HGe compressors are your reliable choice across a wide spectrum of applications.

Download brochure to learn more

HGZ two-stage compressors

Danfoss BOCK® builds on the HG series to create the HGZ two-stage compressor series for prolonged low-temperature cooling. It offers a 6-cylinder compressor, available in two versions, with optional medium-pressure mixing line or pre-mounted.

Features:

3 capacity stages from 93.7 to 122.4 m³/h (50 Hz)
6-cylinder version
LP/HP stage split in a ratio of 2:1
Two-stage operation with liquid subcooler
Post-injection valve matched to refrigerant and application
Particularly reliable and economical compressor concept

Go to HGZ compressors product store

Looking for spare parts?

BOCKSHOP Spare parts catalog

SEARCH. CLICK. FIND.

The online spare parts catalog allows you to find the right spare parts and accessories for BOCK compressors and units with just a few clicks.

Go to BOCKSHOP

Documents

Documents
Type	Name	Language	Updated	Download	File type

Software

Compressor selection tools - VAP

The VAP tool is ideal for finding the appropriate compressors or units for stationary 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.

Go to tool - VAP for Stationary applications

Related applications

Learning

Join the CO₂ Technology Training at our Training Center in Frickenhausen

On-site CO₂ Basic training with the tour of the training application, available in English and in German.

Gain a good awareness knowledge about CO₂ technology and register to one of our face-to-face courses. A complete transcritical supermarket cooling system, incl. heat recovery, air conditioning, parallel compression and ejector is available at our training center in Frickenhausen.