KNF N680 EX Manual page 10

Use
Maximum surface temperature The maximum surface temperature is the highest temperature that is
Ignition temperature The maximum surface temperature of the pump must always be lower
Temperature class The maximum surface temperature arises from the design of the pump
10 Translation of Original Operation and Installation Instruction, english, KNF 325438 02/22
2.4.4 Temperature classes
reached under the most unfavorable conditions of a surface of the pump.
than the lowest ignition temperature of the gas or vapor/air mixture in
which it is used.
and is specified as temperature class.
Temperature Max. surface temperature
class [°C]
T1
T2
T3
T4
T5
T6
Tab.6
2.4.5 Ignition protection type
Designation
h
h
h
Tab.7
An ignition hazard assessment in accordance with standards DIN EN ISO
80079-36 and DIN EN ISO 80079-37 was performed for the pumps. The
protective goals were reached by applying ignition protection type con-
structional safety "c".
Diaphragm pump N680 EX
450
300
200
135
100
85
Description
Constructional safety "c"
Ignition source monitoring "b"
Liquid immersion "k"
Ignition temperature
[°C]
> 450
> 300
> 200
> 135
> 100
> 85