Diaphragm pump N922 EX
Use
Translation of Original Operation and Installation Instruction, english, KNF 313600 11/19
9
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 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. 11
2.4.5 Ignition protection type
Designation
Description
h
Constructional safety "c"
h
Ignition source monitoring "b"
h
Liquid immersion "k"
Tab. 13
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".
