IOM/GK(P)/CONICAL ISSUE DATE: 10.11.2015
Page 7 LAST REV. DATE: 01.08.2019
Check the product name plate & certification provided to establish that the product
itself is CE marked for Potentially Explosive Atmosphere.
Else product to be treated as
Non CE/ATEX marked.
Marking: An example of ATEX equipment marking is shown below. The applicable
marking will be graved on name plate:
Example:
II 2/3 G/D h Tx Gb/Gc
1
2
3
4
5
6
7
8
1)
CE marking
2)
Use of equipment in potentially explosive atmosphere
3)
Equipment group for surface application
4)
Equipment Category 2 (Zone 1) or 3 (Zone 2)
5)
G-Gas D-dust
6)
Constructional Safety ‘h’ as per EN ISO 80079-36 & 37
7)
Temperature Class –T1-450
ᑻᑻᑻᑻ
C T2-300
ᑻᑻᑻᑻ
C T3-200
ᑻᑻᑻᑻ
C T4-135
ᑻᑻᑻᑻ
C T5-
100
ᑻᑻᑻᑻ
C T6-85
ᑻᑻᑻᑻ
C
8)
Equipment Protection Level – Gb (Zone 1) / Gc (Zone 2)
A.5 Avoiding excessive surface temperatures
ENSURE THE EQUIPMENT TEMPERATURE CLASS IS SUITABLE FOR THE HAZARD
ZONE
A.5.1 Pump liquid temperature
Pumps have a temperature class as stated in the ATEX Ex rating on the name plate.
These are based on a maximum ambient of 40ºC (104ºF). Refer to KIRLOSKAR
BROTHERS LTD. for higher ambient temperatures. The surface temperature of the
pump may be influenced by the temperature of the liquid handled. The maximum
permissible liquid temperature depends on the temperature class and must not
exceed the values in the table applicable below. The temperature rise at the seals,
bearings and due to the minimum permitted flow rate is taken into account in the
temperatures.
Maximum permitted liquid temperature for GK(P) pumps:
Temperature
Class to
EN 13463–1
Maximum
Surface temperature
Permitted
Temperature limit of
liquid handled
Depending on material
and Construction
variant.
T4
135
0
C (275
0
F)
105
0
C (221
0
F)
Consult Kirloskar
Brothers Ltd.
T3
200
0
C (392
0
F)
175
0
C (347
0
F)
Consult Kirloskar
Brothers Ltd.
T2
300
0
C (572
0
F)
250
0
C (482
0
F)
Consult Kirloskar
Brothers Ltd.
