Use
Diaphragm pump N680 EX
10
Translation of Original Operation and Installation Instruction, english, KNF 325438 02/22
2.4.4 Temperature classes
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 vapor/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 temperature
[°C]
Ignition temperature
[°C]
T1
450
> 450
T2
300
> 300
T3
200
> 200
T4
135
> 135
T5
100
> 100
T6
85
> 85
Tab.6
2.4.5 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 performed for the pumps. The
protective goals were reached by applying ignition protection type con-
structional safety "c".
