Types Of Protection - KNF N 922 EX Betriebsanleitung

Diaphragm Pumps N 922 EX
Translation of Original Operating- and Installation Instructions, english, KNF N 922 EX 08/18

2.4.5. Types of protection

Marking Description
b Control of ignition sources
c Constructional safety
d Flame-proof enclosure
fr Flow restricting enclosure
k Liquid immersion
p Pressurization
Tab. 6
2.4.6. Additional conditions
Marking Description
- Equipment can be used without restrictions
X Special additional conditions
U Ex component with partial certification, cannot
be used alone; CE conformity is certified when
installed in a complete system.
Tab. 7
Additional conditions for diaphragm pump N 922FTE EX and
N 922FT.29E EX:
 The pump must not be installed outdoors (outside). Putting into
service only with a suitable weather and corrosion protection
covering (hood).
Use
9