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Explosion groups:
In the case of a few protection types, some equipment assigned to Group II, which is intended for use
in potentially explosive gaseous atmospheres, is assigned according to the type of potentially explosive
area in which they are to be deployed. This equipment is assigned to explosion groups (sub-division)
IIA, IIB and IIC.
—
IIA: propane, acetone, ammonia
IIB: ethylene, city gas
IIC: hydrogen, acetylene, carbon bisulphide
—
Mannesmann Demag air motors with explosion group II are superior to explosion group IIA,
IIB and IIC and can therefore be installed and used in those subcategories.
If the motor is part of an assembly where the components have different ATEX codes, the component
with the lowest level of safety defines the ATEX code of the whole assembly.
Temperature classification (with data on the maximum permissible surface temperature
of equipment used in compliance with EN 13463-1)
MANNESMANN DEMAG compressed air motors are rated:
II 2 G c T....(4)
- 20°C ≤ TA ≤ + 50°C
II 2 GD c T....(4) - 20°C ≤ TA ≤ + 50°C
II 2 G c T....(4)(5) - 20°C ≤ TA ≤ + 40°C
Example of rating plate (sample)
English
17
T1 = 450°C
T2 = 300°C
T3 = 200°C
T4 = 135°C
T5 = 100°C
T6 = 85°C
II 2 GD c T....(4)(5)(6)
Temperature class
Protection provided by
constructive safety EN
Potentially explosive atmosphere
(medium)
Device group
Device group
Equipment identification
Weissacher Straße 1
70499 Stuttgart
MUD 23-190
Pmax. 6 bar
142 552 / 13
–20°C≤ TA ≤ +40°C
II 2 G c T5
1.3
1.4
1.5
Summary of Contents for MRD 12-280
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