KTR Kupplungstechnik
GmbH
D-48407 Rheine
BoWex-ELASTIC
®
Operating/Assembly Instructions
Type HEW and HEW-ZS
KTR-N
Sheet:
Edition:
40114 EN
16 of 20
5
Drawn:
08.11.11 Pz/Hk
Replaced for:
KTR-N valid from 08.04.04
Please note protection
mark ISO 16016.
Verified:
09.11.11 Pz
Replaced by:
5 Enclosure A
Hints and Instructions Regarding the Use in
Hazardous Areas
5.4 Approximate Values of Wear
If the torsional backlash is
S
max.
[mm] / friction
X
max.
[mm], the elastomer part must be replaced.
Reaching the exchange values depends on the operating conditions and the existing operating parameters.
!
C A U T I O N !
In order to ensure a long lifetime of the coupling and to avoid dangers regarding the use in
hazardous areas, the shaft ends must be accurately aligned.
Please absolutely observe the displacement figures indicated (see table 10). If the figures are
exceeded, the coupling is damaged.
Illustration 14: elastomer part in new condition
Illustration 15: wear of elastomer part
Table 11:
Limits of wear each hub
Limits of wear each hub
Size
Friction
X
max.
[mm]
Torsional backlash
S
max.
[mm]
Size
Friction
X
max.
[mm]
Torsional backlash
S
max.
[mm]
42 1,0
1,7 100 1,8
3,1
48 1,0
1,8 125 2,0
3,5
65 1,4
2,5 G
125
2,0
3,5
80 1,6
2,7 150 2,0
3,5
G 80
1,6
2,7
5.5
Marking of Coupling for the Hazardous Area
The ATEX marking of the BoWex-ELASTIC
®
coupling is performed on the polyamide flange of the elastomer
indicating the following details:
Short labelling:
(standard)
II 2GD c IIB T X
Complete labelling:
II 2G c IIB T6, T5 bzw. T4
- 30 °C
T
a
+ 50°C, + 65 °C bzw. + 80 °C
II 2D c T 115 °C - 30 °C
T
a
+ 80 °C
The labelling with Explosion Group llB included the Explosion Group llA.
!
C A U T I O N !
The orderer is responsible for all subsequently made machinings to unbored or pilot bored
and to finish machined coupling parts and spare parts. KTR does not assume any warranty
claims resulting from insufficient remachining.
