Semi-hermetic GEA Bock Compressors used in explosion-risk environments. Differences to standard compressors, information about the current program, general information about ATEX , general measures for explosion-risk areas, information about zone allocations and obligations of the machine operator are presented.

1. Bock ATEX Compressors
Semi-hermetic Compressors in Explosion-risk
Environments
GEA Refrigeration Technologies

2. Differences to standard compressors
Bock ATEX Compressors GEA Refrigeration Technologies

3. The current program …
… 6 model sizes with 20 capacity stages from 5,4 to 122,4 m³/h (50 Hz)
D
I
S
P
L
A
C
E
M
E
N
T
EX-HG12P EX-HG22P EX-HG34P EX-HG4 EX-HG5 EX-HG6
Bock ATEX Compressors GEA Refrigeration Technologies

4. Type key – ATEX Compressor
Bock ATEX Compressors GEA Refrigeration Technologies

5. General information about ATEX
(french: ATmosphère EXplosibles)
Explosion-risk in nearly all process engineering systems
ATEX
- Creates uniform During manufacturing,
Static discharge, electrical
minimum standards processing, transport and
equalising currents and
- Improves the safety and storage: flammable gases,
shock waves can trigger
health protection of workers vapours and mist are
explosions
- Legal requirement generated
since 2003
Bock ATEX Compressors GEA Refrigeration Technologies

6. General measures for explosion-risk areas
Explosion protection document
Adequate Instructions
Written work permit
(in the case of dangerous work)
Warning singns
Probibition of ignition sources
Tests and inspections
Bock ATEX Compressors GEA Refrigeration Technologies

7. What does this mean for refrigerating machines?
Refrigerants are
flammable
Refrigeration- and
air-conditioning
systems Particular safety measures
Compressors
(with refrigerants of have to be taken
the safety group A2
and A3)
An allocation of zones
according to EC directive
1999/92/EC has to be
made
Bock ATEX Compressors GEA Refrigeration Technologies

8. Zone allocation as an obligation of the
machine operator
Zone 0:
The explosive atmosphere is
present constantly, for long periods
of time or frequently
Zone 1:
The explosive atmosphere is
occasionally present during normal
operation
Zone 2:
The explosive atmosphere is not
present during normal operation, or
only briefly
Bock ATEX Compressors GEA Refrigeration Technologies

9. Other obligations of the machine operator
• All components of a refrigeration plant must be examined (compressor, evaporator, condenser,
valves, sensors, …)
• Declaration of the important material properties pertinent to explosion protection
• Use of only correspondingly marked and identified components with the necessary documentation
• Heeding to installation standards and instructions
• Consideration of interactions with other machinery in the system and with the environment
• …
Bock ATEX Compressors GEA Refrigeration Technologies