Presentation about semi-hermetic Bock compressors, including single-stage and two-stage reciprocating compressors HG and HA.

1. GEA Refrigeration Technologies
Single-stage and Two-stage
Reciprocating Compressors HG (HA)
Semi-hermetic Bock Compressors

2. GEA Refrigeration Technologies2 Semi-hermetic Bock Compressors
HG and HA Series
Suction gas-cooled semi-hermetic
compressor
Air-cooled semi-hermetic compressor
for low temperature applications

3. GEA Refrigeration Technologies
HG Series
HG-Principle – Suction gas-cooling of the drive motor
Semi-hermetic Bock Compressors3

4. GEA Refrigeration Technologies
HA Series
HA-Principle – Cooling of the drive motor with integrated ventilation unit
Semi-hermetic Bock Compressors4

5. GEA Refrigeration Technologies5 Semi-hermetic Bock Compressors
Highlights HG/HA 12 + 22 series:
• 2-cylinder design
• 7 capacity stages: 5,4 to 16,2 m³/h [50 Hz]
6,4 to 19,8 m³/h [60 Hz]
• Extended standard equipment
• Standard oil pump, motor protection system MP10
• Extremely compact
• Particularly low installation height and width
• Same footprints as competitor models
• Capacity control with Bock Electronic Frequency
Control (EFC)
• Start unloader with Bock Electronic Soft Start (ESS)
(
Pluscom 2-cylinder compressors

6. GEA Refrigeration Technologies6 Semi-hermetic Bock Compressors
Pluscom 4-cylinder compressors
Highlights HG/HA 34 series:
• 4-cylinder design
• 4 capacity stages: 18,8 to 33,1 m³/h [50 Hz]
22,6 to 39,7 m³/h [60 Hz]
• Extended standard equipment
• Standard oil pump, motor protection system MP10
• Extremely compact
• Particularly low installation height and width
• Capacity control with
• Bock Electronic Frequency Control (EFC)
• Mechanical capacity unloader (50%) (
• Start unloader with Bock Electronic Soft Start (ESS)
(

7. GEA Refrigeration Technologies7 Semi-hermetic Bock Compressors
4-cylinder compressors
Highlights HG/HA 4+5+6 series:
• 4-cylinder compressors
• 9 capacity stages: 40,5 to 122,4 m³/h [50 Hz]
48,6 to 146,9 m³/h [60 Hz]
• Part winding motor
• Drive motor flange mounted onto compressor
casing
• Extended standard equipment
• Standard oil pump, motor protection system MP10
• Capacity control with
• Bock Electronic Frequency Control (EFC)
• Mechanical capacity unloader (50%) (
• Start unloader with Bock Electronic Soft Start (ESS)
(

8. GEA Refrigeration Technologies
Highlights HG/HA 4+5+6 series:
4-cylinder compressors

9. GEA Refrigeration Technologies9 Semi-hermetic Bock Compressors
6-cylinder compressors
Highlights HG7 series:
• 6-cylinder compressors
• 3 capacity stages: 140,7 m³/h
161,4 m³/h 50 Hz
183,6 m³/h
• Part winding motor
• Common casing for compressor and motor
• Capacity control with
• Bock Electronic Frequency Control (EFC)
• Mechanical capacity unloader (33/66%) (
• Start unloader with Bock Electronic Soft Start
(ESS) (

10. GEA Refrigeration Technologies
6-cylinder two-stage compressor HGZ7

11. GEA Refrigeration Technologies
6-cylinder two-stage compressor HGZ7

12. GEA Refrigeration Technologies
With Heat Exchanger Without Heat Exchanger
Qo= m (h1a - h8)
6-cylinder two-stage compressor HGZ7

13. GEA Refrigeration Technologies
In operation with Heat Exchanger
and obtained Subcooling Δtch= 50 K,
you can reach >40% more efficiency!
Evaporating Temperature °C
SubcoolingTemperature°C
exitheatexchanger
Diagram to determine subcooling temperature
on exit heat exchanger
6-cylinder two-stage compressor HGZ7

14. GEA Refrigeration Technologies
6-cylinder two-stage compressor HGZ7
Highlights HGZ7 series:
• 6-cylinder compressor
• 3 capacity stages:
HGZ7/2110 HP 61,2 / LP 122,4 m3/h (50Hz)
HGZ7/1860 HP 53,8 / LP 107,6 m3/h
HGZ7/1620 HP 46,9 / LP 93,7 m3/h
• Part Winding Motor
• Refrigerant R404; R410A; R22

15. GEA Refrigeration Technologies15 Semi-hermetic Bock Compressors
8-cylinder compressors
Highlights HG8 series:
• 8-cylinder compressors
• 3 capacity stages: 214,3 m³/h
245,9 m³/h 50 Hz
279,8 m³/h
• Part winding motor
• Common casing for compressor and motor
• Capacity control with
• Bock Electronic Frequency Control (EFC)
• Mechanical capacity unloader (33/66%) (

16. GEA Refrigeration Technologies16 Semi-hermetic Bock Compressors
Special Features: Wear-resistant durable driving gear
Pluscom 2- and 4-cylinder compressors
• Solid construction and design
• Low friction sleeve bearings
• Aluminium pistons with two ring assembly
4-, 6- and 8-cylinder compressors
• Solid construction and design
• Low friction sleeve bearings
• Surface-hardened crankshaft
• Aluminium pistons with triple ring assembly,
HG(HA)4 with double ring assembly
• Aluminium connecting rod with high
resistance piston bolt bearings starting
HG(HA)5

17. GEA Refrigeration Technologies17 Semi-hermetic Bock Compressors
Special features: Solid construction and design
HG(HA)5-6
HG7-8
• Valve made of high quality impact-resistant
spring steel
• Concentric reed valve on the suction side 2
HG(HA)12-34
HG(HA)4
• Valve made of high quality impact-resistant
spring steel
• Finger reed valve 1
1 2

18. GEA Refrigeration Technologies
Special features: Safe, reliable oil supply
• Lubricating system with oil pump independent of rotation direction
• Large volume oil sump
Semi-hermetic Bock Compressors18

19. GEA Refrigeration Technologies19 Semi-hermetic Bock Compressors
Special Features: Variable suction line valve position (HG)
2- and 4-cylinder 6- and 8-cylinder
• Shutoff valve rotates through 90° (2 and 4 cylinder), suction cover rotates through 90° (8-cylinder)
• Flexible location for suction line connection

20. GEA Refrigeration Technologies20 Semi-hermetic Bock Compressors
Special features: Oil sump heater
• Standard in 4-, 6- and 8-cylinder compressors
HG(HA)4 up to HG8
• Immersion case design
• Replacement possible without opening the
refrigerating circuit
• Optional in 2- and 4-cylinder compressors
HG(HA)12 up to HG(HA)34
• PTC heater, self-regulating
• Replacement without opening the refrigeration
circuit

21. GEA Refrigeration Technologies
• Easy electrical installation due to large internal
volume
• Terminal block with cables in glass seal model
• Hinged lifting cover with a single quick fastener
(6-cylinder)
• Cover with simple snap closure (8-cylinder)
• Inspection window for compressor monitoring
(8-cylinder)
• Protection system: 4-cylinder IP65; 6- and 8-
cylinder IP54
• Robust aluminium construction
• Easy electrical installation due to large
internal volume
• Terminal block with cables in glass seal
model
• Hinged and removable lifting cover
with a single quick fastener
• Terminal strip for add-on components
• Protection system: IP66
2
21 Semi-hermetic Bock Compressors
Special Features: Electrical switch box
1
1
2

22. GEA Refrigeration Technologies22 Semi-hermetic Bock Compressors
Bock MP10 Electronic Motor
Protection
Special Features
Bock Compressor Management
BCM2000
• Standard with all compressors
• Temperature monitoring with PTC sensors
and optical status indicators
• Discharge gas temperature sensor
(option)
• Innovative and advanced compressor
management system
• Optional for 4-, 6- and 8-cylinder
compressors

23. GEA Refrigeration Technologies23 Semi-hermetic Bock Compressors
Via frequency converter
Continuously variable speed control using the
Bock EFC / EFCe
(Electronic Frequency Control)
Up to 25% less power consumption
EFC Continuously variable speed control
directly mounted on the compressor
HG(HA)12 to HG(HA)34
Special features: Efficient capacity control (option)
2
Via capacity regulator
Cylinder cover incorporating a connection for
capacity control
Possible control stages:
• 4-cylinder: 50 %,
• 6-cylinder: 33 % / 66 %,
• 8-cylinder: 25 % / 50 % / 75 %
1
1
2

24. GEA Refrigeration Technologies
Product summary HG12 – HG8
8 model sizes with 26 capacity stages
in 2-, 4-, 6- and 8-cylinder design with swept volumes from 5,4 up to 279,8 m3/h [50 Hz]

25. GEA Refrigeration Technologies
Product summary HA12 – HA6
6 model sizes with 20 capacity stages
in 2-, 4- and 6-cylinder design with swept volumes from 5,4 up to 122,4 m3/h [50 Hz]
Semi-hermetic Bock Compressors25

26. GEA Refrigeration Technologies
Semi-hermetic compressor types
26 Semi-hermetic Bock Compressors
CO2 subcritical CO2 transcritical
One-stage
compressors
R407C up to 35 bar
ATEX Version HC Version for
Hydrocarbons
Aluminium Version 2-pole motor design
Two-stage
compressors
Duplex Condensing /
receiver units

27. GEA Refrigeration Technologies
Additional accessories
Start unloader/
Capacity regulator
Prepared for
capacity regulator
Oil pressure
safety switch
Oil differential
pressure sensor
Oil service valve
Semi-hermetic Bock Compressors27
Thermal protection
thermostat

28. GEA Refrigeration Technologies
Additional accessories
Oil temperature
control
Water-cooled cylinder
covers
Additional fan
Connection piece in
welded construction
Intermediate adapter
for discharge line valve
Semi-hermetic Bock Compressors28

29. GEA Refrigeration Technologies
References Stationary Applications
Semi-hermetic Bock Compressors29