Semi hermetic bock compressors

GEA Refrigeration Technologies

Single-stage and Two-stage

Reciprocating Compressors HG (HA)

Semi-hermetic Bock Compressors

GEA Refrigeration Technologies 2 Semi-hermetic Bock Compressors

HG and HA Series

Suction gas-cooled semi-hermetic

compressor

Air-cooled semi-hermetic compressor

for low temperature applications


HG Series

HG-Principle – Suction gas-cooling of the drive motor

Semi-hermetic Bock Compressors 3


HA Series

HA-Principle – Cooling of the drive motor with integrated ventilation unit



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


Pluscom 4-cylinder compressors

Highlights HG/HA 34 series:

• 4-cylinder design


22,6 to 39,7 m³/h [60 Hz]



• Extremely compact

• Particularly low installation height and width

• Capacity control with

• Bock Electronic Frequency Control (EFC)

• Mechanical capacity unloader (50%) (


(


4-cylinder compressors

Highlights HG/HA 4+5+6 series:

• 4-cylinder compressors


48,6 to 146,9 m³/h [60 Hz]

• Part winding motor

• Drive motor flange mounted onto compressor

casing





• Mechanical capacity unloader (50%) (


(


Highlights HG/HA 4+5+6 series:




Highlights HG7 series:


• 3 capacity stages: 140,7 m³/h

161,4 m³/h 50 Hz

183,6 m³/h


• Common casing for compressor and motor



• Mechanical capacity unloader (33/66%) (

• Start unloader with Bock Electronic Soft Start

(ESS) (


6-cylinder two-stage compressor HGZ7


With Heat Exchanger Without Heat Exchanger

Qo= m (h1a - h8)



In operation with Heat Exchanger

and obtained Subcooling Δtch= 50 K,

you can reach >40% more efficiency!

Evaporating Temperature °C

Su

bco

olin

g T

em

pe

ratu

re °

C

exit h

ea

t e

xch

an

ge

r

Diagram to determine subcooling temperature

on exit heat exchanger




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



Highlights HG8 series:


• 3 capacity stages: 214,3 m³/h

245,9 m³/h 50 Hz

279,8 m³/h


• Common casing for compressor and motor



• Mechanical capacity unloader (33/66%) (


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


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


Special features: Safe, reliable oil supply

• Lubricating system with oil pump independent of rotation direction

• Large volume oil sump



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


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


• 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


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



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


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]


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 compressor types


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


Additional accessories

Start unloader/

Capacity regulator

Prepared for

capacity regulator

Oil pressure

safety switch

Oil differential

pressure sensor

Oil service valve


Thermal protection

thermostat


Additional accessories

Oil temperature

control

Water-cooled cylinder

covers

Additional fan

Connection piece in

welded construction

Intermediate adapter

for discharge line valve



References Stationary Applications


Semi hermetic bock compressors

Business

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