KNF LABOPORT N820.3FT.29.18G, Manual

Page: 68 / 333

Chemically-resistant Laboratory pump N820.18 EX
Use
Translation of Original Operating Instruction, English, KNF
317428-317425 09/20
13
3.4.4 Temperature classes [Für die Übersetzung
exportiert]
Maximum
surface
temperature
The maximum surface temperature is the highest temperature
that is reached under the most unfavorable conditions of a
surface of the pump.
Ignition
temperature
The maximum surface temperature of the pump must always
be lower than the lowest ignition temperature of the gas or va-
por/air mixture in which it is used.
Temperature
class
The maximum surface temperature arises from the design of
the pump and is specified as temperature class.
Temperature class Max. surface tempera-
ture [°C] Ignition temperature
[°C]
T1 450 > 450
T2 300 > 300
T3 200 > 200
T4 135 > 135
T5 100 > 100
T6 85 > 85
Tab.6:
3.4.5 Ignition protection type
Designation Description
H Constructional safety "c"
H Ignition source monitoring "b"
H Liquid immersion "k"
Tab.7:
An ignition hazard assessment in accordance with standards
DIN EN ISO 80079-36 and DIN EN ISO 80079-37 was per-
formed for the pumps. The protective goals were reached by
applying ignition protection type constructional safety "c".
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