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A.0500.601 – Atex IM -TG G/H/MAG/SRT/08.00 EN (01/2021)
1.5 Atex type designation examples
Example 1: II 2G Ex h IIC T3-T4 Gb
II 2G
Marking according to Group II, Category 2, Gas (G) protection
Ex h
Marking for non electrical Ex equipment. Type of protection „c”
(constructional safety)
IIC
Gas group
T3-T4
Temperature class T3 to T4
Gb
Equipment protection level
Example 2: II 2G Ex h IIC 240°C (T2) Gb
II 2G
Marking according to Group II, Category 2, Gas (G) protection
Ex h
Marking for non electrical Ex equipment. Type of protection „c”
(constructional safety)
IIC
Gas group
240°C (T2)
Maximum surface temperature of 240 degrees Celsius
Gb
Equipment protection level
Example 3: II 2D Ex h IIIC T240°C Db
II 2D
Marking according to Group II, Category 2, Dust (D) protection
Ex h
Marking for non electrical Ex equipment. Type of protection „c”
(constructional safety)
IIIC
Dust group
T240°C
Maximum surface temperature of 240 degrees Celsius
Db
Equipment protection level
Environment temperature should be between -20°C and +40°C, if not, the corresponding
environment temperature will be indicated on the nameplate.
1.6 Temperature classes and allowable temperatures
In normal operation the highest temperature on the surfaces of the pump should
correspond to the highest temperature of the pumped product, or the heating medium
in case the pump is heated by jackets. The maximum permissible temperature depends
on the temperature class (T4 to T1) or on T
max
to be complied with. The bearing bracket
surfaces must be freely exposed to the atmosphere to allow cooling.
1.6.1 II 2G allowable temperature TG GS, GP, GM, H and SRT
ISO EN 80076-36
Temperature class
T
max
Pumped medium
temperature T
A
Heating medium T
A
(if any)
Bearing bracket
temperature (L3)
S-jacket
T-jacket
T4 - 135°C
≤ 120°C
≤ 120°C
≤ 120°C
≤ 100°C
T3 - 200°C
≤ 180°C
≤ 180°C
≤ 180°C
≤ 120°C
T2 - 300°C
≤ 270°C *)
–
≤ 270°C *)
≤ 160°C
T1 - 450°C
≤ 300°C *)
–
≤ 300°C *)
≤ 180°C
(*) temperature to decrease according to material limits (see IM).
•
When the temperature limits are reduced because of internal materials selection, the
maximum allowable surface temperature T
max
will be supplied instead of the temperature
class, the same way as in case of D, dust protection.
•
For T5 (100°C) and T6 (85°C) classes contact your distributor.
•
TG GS, GP, GM, can be used in a temperature range between -20ºC and +40ºC.
•
TG H in stainless steel execution can be used in a temperature range between -40ºC
and +40ºC; materials other than stainless steel can be used in the temperature range
between -20ºC and +40ºC.
