KSB Amarex - 9.4 Flamepaths on explosion-proof motors

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Amarex
2573.820/02-EN
9.4 Flamepaths on explosion-proof motors
Table33: Overview of flamepaths
Sizes Pump set
Motor sizes:
NG 08
NG 09
Cable entry Cover Shaft Pump casing
Flamepath number 1 2 3 4
Length of flamepath [mm] ≥ 12,5 ≥ 12,5 ≥ 12,5 ≥ 12,5
Inside diameter (drilled hole) [mm] 32 174 30 120
Outside diameter (shaft) [mm] 32 174 29,9 120
Tolerance ISO inside diameter H8 H7 - H8
Tolerance ISO outside diameter - g6 - g6
Tolerance in µm inside diameter to
DINISO286/2
Maximum 39 40 - 54
Minimum 0 0 - 0
Tolerance in µm outside diameter
to DINISO286/2
Maximum - -14 - -12
Minimum - -39 - -34
Tolerance in µm inside diameter Maximum - - 20 -
Minimum - - 0 -
Tolerance in µm outside diameter Maximum -25 - -60 -
Minimum -75 - -80 -