KTR ROTEX Operating/Mounting Instructions

ROTEX®
Operating/Assembly instructions
AFN, BFN, CF, CFN, DF and DFN
KTR-N
Sheet:
Edition:
40212 EN
1 of 32
8
ROTEX®
Torsionally flexible jaw couplings
AFN, BFN, CF, CFN, DF, DFN
and their combinations
according to directive 2014/34/EU and UK directive SI 2016 No. 1107
Type AFN
Type BFN
Type CF
Type CFN
Type DF
Type DFN
Please observe protection
note ISO 16016.
Drawn:
Verified:
2022-07-05 Pz/Wb
2022-08-04 Pz
Replacing:
Replaced by:
KTR-N dated 2019-10-09
ROTEX®
Operating/Assembly instructions
AFN, BFN, CF, CFN, DF and DFN
KTR-N
Sheet:
Edition:
40212 EN
2 of 32
8
ROTEX® is a torsionally flexible jaw coupling. It is able to compensate for shaft misalignment, for
example caused by manufacturing inaccuracies, thermal expansion, etc.
• Type AFN allows to replace a spider without having to disassemble the driving resp. driven machine.
• Type BFN ensures the power flow without having to disassemble the driving or driven machine and
allows for radial disassembly without axial movement of the driving machine.
• Types CF, CFN, DF and DFN are flange types.
Table of contents
1
Technical data
4
2
Advice
6
2.1
2.2
2.3
2.4
2.5
2.6
6
6
6
7
7
7
3
4
General advice
Safety and advice symbols
General hazard warnings
Proper use
Coupling selection
Reference to EC Machinery Directive 2006/42/EC
Storage, transport and packaging
8
3.1
3.2
8
8
Storage
Transport and packaging
Assembly
8
4.1
4.2
4.3
4.4
4.5
4.6
4.7
4.8
8
11
13
14
15
16
17
18
Components of the coupling
Advice for finish bore
Assembly of the coupling (general)
Assembly of type AFN
Assembly of type BFN
Assembly of type CF and CFN
Assembly of type DF and DFN
Displacements - alignment of the couplings
5
Start-up
19
6
Breakdowns, causes and elimination
20
7
Disposal
22
8
Maintenance and service
23
9
Spares inventory, customer service addresses
23
Please observe protection
note ISO 16016.
Drawn:
Verified:
2022-07-05 Pz/Wb
2022-08-04 Pz
Replacing:
Replaced by:
KTR-N dated 2019-10-09
ROTEX®
Operating/Assembly instructions
AFN, BFN, CF, CFN, DF and DFN
KTR-N
Sheet:
Edition:
40212 EN
3 of 32
8
Table of contents
10
Enclosure A
Advice and instructions regarding the use in
10.1 Intended use in
potentially explosive atmospheres
potentially explosive atmospheres
10.2 Inspection intervals for couplings in
10.3 Standard values of wear
Please observe protection
note ISO 16016.
Drawn:
Verified:
25
potentially explosive atmospheres
10.4
marking of coupling for potentially explosive atmospheres
10.5 EU Certificate of conformity
10.6 UK Declaration of conformity
2022-07-05 Pz/Wb
2022-08-04 Pz
Replacing:
Replaced by:
24
26
28
29
31
32
KTR-N dated 2019-10-09
ROTEX®
Operating/Assembly instructions
AFN, BFN, CF, CFN, DF and DFN
1
KTR-N
Sheet:
Edition:
40212 EN
4 of 32
8
Technical data
Illustration 1: ROTEX® type AFN
Illustration 2: ROTEX® type BFN
Illustration 3: ROTEX® type CF
Illustration 4: ROTEX® type CFN
Illustration 5: ROTEX® type DF
Illustration 6: ROTEX® type DFN
ROTEX® couplings with attachments that can generate heat, sparks and static charging
(e. g. combinations with brake drums, brake disks, overload systems such as torque
limiters, fan impellers etc.) are not permitted for the use in potentially explosive
atmospheres. A separate analysis must be performed.
Please observe protection
note ISO 16016.
Drawn:
Verified:
2022-07-05 Pz/Wb
2022-08-04 Pz
Replacing:
Replaced by:
KTR-N dated 2019-10-09
ROTEX®
Operating/Assembly instructions
AFN, BFN, CF, CFN, DF and DFN
1
KTR-N
Sheet:
Edition:
40212 EN
5 of 32
8
Technical data
Table 1: Technical data and dimensions
Size
24
28
38
42
48
55
65
75
90
100
110
125
140
160
180
Size
24
28
38
42
48
55
65
75
90
100
110
125
140
160
180
Component
Spider 1) (component 2)
Rated torque [Nm]
92 ShA
98 ShA
64 ShD
35
60
75
95
160
200
190
325
405
265
450
560
310
525
655
1
1a
1
1a
1
1a
1
1a
1
1a
1
1a
1
1
1
1
1
1
1
1
1
410
685
825
625
1280
2400
3300
4800
6650
8550
12800
18650
940
1920
3600
4950
7200
10000
12800
19200
28000
1175
2400
4500
6185
9000
12500
16000
24000
35000
E
18
20
24
26
28
30
35
40
45
50
55
60
65
75
85
B1
14
15
18
20
21
22
26
30
34
38
42
46
50
57
64
S
2.0
2.5
3.0
3.0
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.5
9.0
10.5
L1, L2
30
35
45
50
56
65
75
85
100
110
120
140
155
175
195
3)
24
28
28
38
40
48
45
55
52
62
60
74
70
80
97
115
125
145
160
185
200
L3
30.5
35.5
45.5
51.0
57.0
66.0
76.0
86.5
101.5
111.5
122.0
142.0
157.5
177.5
198.0
Dimensions [mm]
Max. finish bore 2)
D
Component 4N
DH
DI1
Steel
D1
27
56 4)
27
35
30
66 4)
30
40
48
38
80
38
55
45
95
46
62
50
105
51
74
60
120
60
80
70
135
68
95
80
160
80
110
105
200
100
115
225
113
130
255
127
150
290
147
170
320
165
200
370
190
230
420
220
Dimensions [mm]
L5
L7
LAFN
1.5
8
94
1.5
10
110
1.5
10
134
2.0
12
150
2.0
12
164
2.0
16
192
2.0
16
217
2.5
19
248
3.0
20
285
4.0
25
320
4.0
26
347
5.0
30
400
5.0
34
443
5.0
38
501
5.5
40
555
LBFN
86
100
124
138
152
176
201
229
265
295
321
370
409
463
515
General
DN, DN1
LCF
56
65
79
88
96
111
126
144
165
185
201
230
254
288
320
DN2
DBSE
36
33
42
39
52
43
62
48
70
50
40
56
48
66
66
78
75
94
85
104
98
118
115
135
160
180
200
230
255
290
325
80
60
94
108
142
158
178
206
235
270
315
65
75
82
97
103
116
128
146
159
LCFN
56
65
79
88
96
111
126
144
165
185
201
230
254
288
320
LDF
34
40
44
50
52
62
67
78
85
100
107
120
133
151
165
LDFN
34
40
44
50
52
62
67
78
85
100
107
120
133
151
165
Dimensions [mm]
Size
24
28
38
42
48
55
65
75
90
100
110
125
140
160
180
1)
2)
3)
4)
5)
DA
80
100
115
140
150
175
190
215
260
285
330
370
410
460
520
D4
65
80
95
115
125
145
160
185
225
250
290
325
360
410
465
CF and DF
D5
55
65
80
95
105
120
135
160
200
225
255
290
320
370
420
Z
5
6
6
6
8
8
10
10
12
12
12
16
16
16
16
DL
4.5
6.6
6.6
9.0
9.0
11.0
11.0
13.5
13.5
13.5
18.0
18.0
22.0
26.0
26.0
D4
45
54
66
80
90
102
116
136
172
195
218
252
282
325
375
D5
36
44
54
65
75
84
96
112
145
165
180
215
245
280
330
AFN, BFN, CFN and DFN
Z
MxLM
TA [Nm]
8
M5x16
10
8
M6x20
17
8
M8x22
41
12
M8x25
41
12
M8x25
41
8
M10x30
83
12
M10x30
83
15
M12x40
120
15
M16x40
295
15
M16x50
295
15
M20x50
580
15
M20x60
580
15
M20x60
580
15
M24x70
1000
18
M24x80
1000
pitch 5)
8x45°
8x45°
8x45°
16x22.5°
16x22.5°
8x45°
16x22.5°
20x18°
20x18°
20x18°
20x18°
20x18°
20x18°
20x18°
24x15°
Maximum torque of the coupling TKmax. = Rated torque of the coupling TKN x 2
Bores H7 with keyway to DIN 6885 sheet 1 [JS9] and setscrew
Size 24 and 28 material: Al-D; size 38 to 90 material: EN-GJL-250; size 100 to 180 material: EN-GJS-400-15
Material steel: size 24 = 55 mm; size 28 = 65 mm
Thread in the driving flange between the cams.
Please observe protection
note ISO 16016.
Drawn:
Verified:
2022-07-05 Pz/Wb
2022-08-04 Pz
Replacing:
Replaced by:
KTR-N dated 2019-10-09
ROTEX®
Operating/Assembly instructions
AFN, BFN, CF, CFN, DF and DFN
2
KTR-N
Sheet:
Edition:
40212 EN
6 of 32
8
Advice
2.1 General advice
Please read through these operating/assembly instructions carefully before you start up the coupling.
Please pay special attention to the safety instructions!
The ROTEX® coupling is suitable and approved for the use in potentially explosive atmospheres.
When using the coupling in potentially explosive atmospheres, observe the special advice and
instructions regarding safety in enclosure A.
The operating/assembly instructions are part of your product. Please store them carefully and close to the
coupling. The copyright for these operating/assembly instructions remains with KTR.
2.2 Safety and advice symbols
STOP
!

Warning of potentially explosive
atmospheres
This symbol indicates notes which may contribute to
preventing bodily injuries or serious bodily injuries that
may result in death caused by explosion.
Warning of personal injury
This symbol indicates notes which may contribute to
preventing bodily injuries or serious bodily injuries that
may result in death.
Warning of product damages
This symbol indicates notes which may contribute to
preventing material or machine damage.
General advice
This symbol indicates notes which may contribute to
preventing adverse results or conditions.
Warning of hot surfaces
This symbol indicates notes which may contribute to
preventing burns with hot surfaces resulting in light to
serious bodily injuries.
2.3 General hazard warnings
STOP
With assembly, operation and maintenance of the coupling it has to be made sure that the
entire drive train is secured against accidental switch-on. You may be seriously hurt by
rotating parts. Make absolutely sure to read through and observe the following safety
indications.
• All operations on and with the coupling have to be performed taking into account "safety first".
• Make sure to switch off the power pack before you perform your work on the coupling.
• Secure the power pack against accidental switch-on, e. g. by providing warning signs at the place of switch-on
or removing the fuse for current supply.
• Do not reach into the operating area of the coupling as long as it is in operation.
• Secure the coupling against accidental contact. Provide for the necessary protection devices and covers.
Please observe protection
note ISO 16016.
Drawn:
Verified:
2022-07-05 Pz/Wb
2022-08-04 Pz
Replacing:
Replaced by:
KTR-N dated 2019-10-09
ROTEX®
Operating/Assembly instructions
AFN, BFN, CF, CFN, DF and DFN
2
KTR-N
Sheet:
Edition:
40212 EN
7 of 32
8
Advice
2.4 Proper use
You may only assemble, operate and maintain the coupling if you
• have carefully read through the operating/assembly instructions and understood them
• are technically qualified and specifically trained (e. g. safety, environment, logistics)
• are authorized by your company
The coupling may only be used in accordance with the technical data (see chapter 1). Unauthorized modifications
on the coupling design are not admissible. We will not assume liability for any damage that may arise. In the
interest of further development we reserve the right for technical modifications.
The ROTEX® described in here corresponds to the state of the art at the time of printing of these
operating/assembly instructions.
2.5 Coupling selection
!
For a permanent and failure-free operation of the coupling it must be selected according to
the selection instructions (according to DIN 740 part 2) for the particular application (see
catalogue drive technology "ROTEX®").
If the operating conditions (performance, speed, modifications on engine and machine)
change, the coupling selection must be reviewed.
Make sure that the technical data regarding torque refer to the spider only. The transmittable
torque of the shaft-hub-connection must be reviewed by the customer and is subject to his
responsibility.
For drives subject to torsional vibrations (drives with cyclic stress due to torsional vibrations) it is necessary to
perform a torsional vibration calculation to ensure a reliable selection. Typical drives subject to torsional vibrations
are e. g. drives with diesel engines, piston pumps, piston compressors etc. If requested, KTR will perform the
coupling selection and the torsional vibration calculation.
2.6 Reference to EC Machinery Directive 2006/42/EC
The couplings supplied by KTR should be considered as components, not machines or partly completed
machines according to EC Machinery Directive 2006/42/EC. Consequently KTR does not have to issue a
declaration of incorporation. For details about safe assembly, start-up and safe operation refer to the present
operating/assembly instructions considering the warnings.
Please observe protection
note ISO 16016.
Drawn:
Verified:
2022-07-05 Pz/Wb
2022-08-04 Pz
Replacing:
Replaced by:
KTR-N dated 2019-10-09
ROTEX®
Operating/Assembly instructions
AFN, BFN, CF, CFN, DF and DFN
3
KTR-N
Sheet:
Edition:
40212 EN
8 of 32
8
Storage, transport and packaging
3.1 Storage
The coupling hubs are supplied in preserved condition and can be stored in a dry and roofed place for 6 - 9
months.
The features of the coupling spiders (elastomers) remain unchanged for up to 5 years with favourable storage
conditions.
!
The storage rooms must not include any ozone-generating devices like e. g. fluorescent
light sources, mercury-vapour lamps or electrical high-voltage appliances.
Humid storage rooms are not suitable.
Make sure that condensation is not generated. The best relative air humidity is less than
65 %.
3.2 Transport and packaging
!
In order to avoid any injuries and any kind of damage always make use of proper transport
and lifting equipment.
The couplings are packed differently each depending on size, number and kind of transport. Unless otherwise
contractually agreed, packaging will follow the in-house packaging specifications of KTR.
4
Assembly
The coupling is generally supplied in individual parts. Before assembly the coupling has to be inspected for
completeness.
4.1 Components of the coupling
Components of ROTEX® type AFN
Component
2
3Na
4N
5
6
Quantity
1
2
2
see table 3 1)
2
Description
Spider
Driving flange N
Coupling flange N
Cap screws DIN EN ISO 4762 - 12.9
Setscrews DIN EN ISO 4029
1) each coupling half
Illustration 7: ROTEX® type AFN
Please observe protection
note ISO 16016.
Drawn:
Verified:
2022-07-05 Pz/Wb
2022-08-04 Pz
Replacing:
Replaced by:
KTR-N dated 2019-10-09
ROTEX®
Operating/Assembly instructions
AFN, BFN, CF, CFN, DF and DFN
4
KTR-N
Sheet:
Edition:
40212 EN
9 of 32
8
Assembly
4.1 Components of the coupling
Components of ROTEX® type BFN
Component
1
2
3Na
4N
5
6
Quantity
1
1
1
1
see table 3
2
Description
Hub
Spider
Driving flange N
Coupling flange N
Cap screws DIN EN ISO 4762 - 12.9
Setscrews DIN EN ISO 4029
Illustration 8: ROTEX® type BFN
Components of ROTEX® type CF
Component
1
2
3b
6
Quantity
1
1
1
1
Description
Hub
Spider
Driving flange type B
Setscrews DIN EN ISO 4029
Illustration 9: ROTEX® type CF
Please observe protection
note ISO 16016.
Drawn:
Verified:
2022-07-05 Pz/Wb
2022-08-04 Pz
Replacing:
Replaced by:
KTR-N dated 2019-10-09
ROTEX®
Operating/Assembly instructions
AFN, BFN, CF, CFN, DF and DFN
4
KTR-N
Sheet:
Edition:
40212 EN
10 of 32
8
Assembly
4.1 Components of the coupling
Components of ROTEX® type CFN
Component
1
2
3Na
6
Quantity
1
1
1
1
Description
Hub
Spider
Driving flange N
Setscrews DIN EN ISO 4029
Illustration 10: ROTEX® type CFN
Components of ROTEX® type DF
Component
2
3b
Quantity
1
2
Description
Spider
Driving flange type B
Illustration 11: ROTEX® type DF
Please observe protection
note ISO 16016.
Drawn:
Verified:
2022-07-05 Pz/Wb
2022-08-04 Pz
Replacing:
Replaced by:
KTR-N dated 2019-10-09
ROTEX®
Operating/Assembly instructions
AFN, BFN, CF, CFN, DF and DFN
4
KTR-N
Sheet:
Edition:
40212 EN
11 of 32
8
Assembly
4.1 Components of the coupling
Components of ROTEX® type DFN
Component
2
3Na
Quantity
1
2
Description
Spider
Driving flange N
Illustration 12: ROTEX® type DFN
Features of standard spiders
Spider hardness
(Shore)
92 Shore A
T-PUR®
PUR
(orange)
(yellow)
98 Shore A
T-PUR®
PUR
(purple)
(red)
64 Shore D
T-PUR®
PUR
(light green)
(natural white 1))
Marking
(colour)
1) Natural white with green marking of teeth
4.2 Advice for finish bore
STOP
The maximum permissible bore diameters D (see chapter
1 - technical data) must not be exceeded. If these figures
are disregarded, the coupling may tear. Rotating particles
may cause danger to life.
• Hub bores machined by the customer have to observe
concentricity resp. axial runout (see illustration 13).
• Make absolutely sure to observe the figures for ØD.
• Carefully align the hubs when the finish bores are drilled.
• Only valid with design AFN, BFN, CF and CFN:
Provide for a setscrew according to DIN EN ISO 4029 with
a cup point or an end plate to fasten the hubs axially.
Illustration 13: Concentricity and axial runout
Please observe protection
note ISO 16016.
Drawn:
Verified:
2022-07-05 Pz/Wb
2022-08-04 Pz
Replacing:
Replaced by:
KTR-N dated 2019-10-09
ROTEX®
Operating/Assembly instructions
AFN, BFN, CF, CFN, DF and DFN
4
KTR-N
Sheet:
Edition:
40212 EN
12 of 32
8
Assembly
4.2 Advice for finish bore
The customer bears the sole responsibility for all machining processes performed
subsequently on unbored or pilot bored as well as finish machined coupling components
and spare parts. KTR does not assume any warranty claims resulting from insufficient
remachining.
!
KTR supplies unbored or pilot bored coupling components and spare parts only upon
explicit request of the customer. These parts are additionally marked with the symbol
.
Reference to unbored resp. pilot bored coupling components with explosion protection
marking:
Basically the company KTR Systems GmbH supplies couplings resp. coupling hubs with explosion
protection marking as an unbored or pilot bored type only on explicit request of the customer. The
prerequisite is a declaration of exemption submitted by the customer assuming any responsibility
and liability for respective remachining performed on the product of KTR Systems GmbH.
Table 2: Setscrew DIN EN ISO 4029
Size
Dimension G
Dimension T
Tightening torque TA
[Nm]
24
M5
10
28
M8
15
38
M8
15
42
M8
20
48
M8
20
55
M10
20
65
M10
20
75
M10
25
90
M12
30
100
M12
30
110
M16
35
125
M16
40
140
M20
45
160
M20
50
180
M20
50
2
10
10
10
10
17
17
17
40
40
80
80
140
140
140
Table 3: Recommended fit pairs acc. to DIN 748/1
Bore [mm]
above
up to
50
50
Shaft tolerance
Bore tolerance
k6
m6
H7
(KTR standard)
If a feather keyway is intended to be used in the hub, it should correspond to the tolerance ISO JS9 (KTR
standard) with standard operating conditions or ISO P9 with sophisticated operating conditions (frequently
alternating torsional direction, shock loads, etc.). The keyway should preferably be located between the cams.
With axial fastening via setscrew the tapped hole should be positioned on the keyway except for Al-D which
should be positioned opposite the keyway.
The transmittable torque of the shaft-hub-connection must be reviewed by the customer and is subject to his
responsibility.
Please observe protection
note ISO 16016.
Drawn:
Verified:
2022-07-05 Pz/Wb
2022-08-04 Pz
Replacing:
Replaced by:
KTR-N dated 2019-10-09
ROTEX®
Operating/Assembly instructions
AFN, BFN, CF, CFN, DF and DFN
4
KTR-N
Sheet:
Edition:
40212 EN
13 of 32
8
Assembly
4.3 Assembly of the coupling (general)

We recommend to inspect bores, shaft, keyway and feather key for dimensional accuracy
before assembly.
Heating the hubs or coupling flanges lightly (approx. 80 °C) allows for an easier mounting on
the shaft.
Please pay attention to the ignition risk in potentially explosive atmospheres!
STOP
!
Touching the heated hubs causes burns.
Please wear safety gloves.
With the assembly make sure that the distance dimension E (see table 1) is observed to
allow for axial clearance of the spider when in operation.
Disregarding this advice may cause damage to the coupling.
If used in potentially explosive atmospheres the setscrews to fasten the hubs as well as all
screw connections must be secured against working loose additionally, e. g. conglutinating
with Loctite (average strength).
Please observe protection
note ISO 16016.
Drawn:
Verified:
2022-07-05 Pz/Wb
2022-08-04 Pz
Replacing:
Replaced by:
KTR-N dated 2019-10-09
ROTEX®
Operating/Assembly instructions
AFN, BFN, CF, CFN, DF and DFN
4
KTR-N
Sheet:
Edition:
40212 EN
14 of 32
8
Assembly
4.4 Assembly of type AFN
• Mount the coupling flanges on the shaft of driving
and driven side (see illustration 14).
• The internal sides of the coupling flanges must be
flush with the front sides of the shafts.
Illustration 14: Assembly of coupling flanges
• Shift the power packs in axial direction until the
distance dimension DBSE is achieved (see
illustration 1 and table 1).
• Fasten the coupling flanges by tightening the
setscrews DIN EN ISO 4029 with a cup point
(tightening torque see table 2).
• Plug the driving flanges and the spider together (see
illustration 15).
Illustration 15: Assembly of driving flange and spider
• Put the components plugged together between the
coupling flanges (see illustration 16).
• Hand-tighten the components first.
• Tighten the screws at the tightening torques TA
specified in table 3 by means of a suitable torque
key.
• Centre the spider between the driving flanges and
check the dimensions E and S (see illustration 1 and
table 1).
Illustration 16: Assembly of component assembly
!
Having started up the coupling, the wear of spider has to be inspected at regular
maintenance intervals and the spider has to be replaced, if necessary.
Please observe protection
note ISO 16016.
Drawn:
Verified:
2022-07-05 Pz/Wb
2022-08-04 Pz
Replacing:
Replaced by:
KTR-N dated 2019-10-09
ROTEX®
Operating/Assembly instructions
AFN, BFN, CF, CFN, DF and DFN
4
KTR-N
Sheet:
Edition:
40212 EN
15 of 32
8
Assembly
4.5 Assembly of type BFN
• Mount the coupling flange on the shaft of the driving
side and the hub onto the shaft of the driven side
(see illustration 17).
• The internal sides of the components must be flush
with the front sides of the shafts.
• Fasten the hub and coupling flange by tightening the
setscrews DIN EN ISO 4029 with a cup point
(tightening torques see table 2).
Illustration 17: Assembly of hub or coupling flange
• Insert the driving flange in front of the coupling
flange (see illustration 18).
• Hand-tighten the components first.
• Tighten the screws at the tightening torques TA
specified in table 1 by means of a suitable torque
key.
Illustration 18: Assembly of driving flange
• Insert the spider in the cam section of the hub (see
illustration 19).
• Shift the power packs in axial direction until the
distance dimension E is achieved (see illustration 2
and table 1).
• Centre the spider between the hub and the coupling
flange and check the dimension E and S (see
illustration 2 and table 1).
!
Illustration 19: Assembly of spider
Having started up the coupling, the wear of spider has to be inspected at regular
maintenance intervals and the spider has to be replaced, if necessary.
Hubs without feather keyway may be used in category 3 only and are marked with category
3 accordingly.
Please observe protection
note ISO 16016.
Drawn:
Verified:
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Replacing:
Replaced by:
KTR-N dated 2019-10-09
ROTEX®
Operating/Assembly instructions
AFN, BFN, CF, CFN, DF and DFN
4
KTR-N
Sheet:
Edition:
40212 EN
16 of 32
8
Assembly
4.6 Assembly of type CF and CFN
• Mount the hub on the shaft (see illustration 20).
• The internal side of the hub must be flush with the
face of the shaft.
• Fasten the hub by tightening the setscrew
DIN EN ISO 4029 with a cup point (tightening
torques see table 2).
Illustration 20: Assembly of hub
• Insert the driving flange in front of the flange of
driving or driven side (see illustration 21 type CF and
illustration 22 type CFN).
Illustration 21: Assembly of driving flange (type CF)
• Hand-tighten the components first.
• Tighten the screws at the tightening torques TA
specified in table 1 by means of a suitable torque
key.
Illustration 22: Assembly of driving flange (type CFN)
• Insert the spider in the cam section of the hub (see
illustration 23).
• Push the machines to be coupled together.
• Centre the spider between the hub and the driving
flange and check the dimension E and S (see
illustration 3 type CF and illustration 4 type CFN).
!
Illustration 23: Assembly of spider
Having started up the coupling, the wear of spider has to be inspected at regular
maintenance intervals and the spider has to be replaced, if necessary.
Hubs without feather keyway may be used in category 3 only and are marked with category
3 accordingly.
Please observe protection
note ISO 16016.
Drawn:
Verified:
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2022-08-04 Pz
Replacing:
Replaced by:
KTR-N dated 2019-10-09
ROTEX®
Operating/Assembly instructions
AFN, BFN, CF, CFN, DF and DFN
4
KTR-N
Sheet:
Edition:
40212 EN
17 of 32
8
Assembly
4.7 Assembly of type DF and DFN
• Insert the driving flanges in front of the flanges of
driving and driven side (see illustration 24 type DF
and illustration 25 type DFN).
• Hand-tighten the components first.
Illustration 24: Assembly of driving flanges (type DF)
• Tighten the screws at the tightening torques TA
specified in table 1 by means of a suitable torque
key.
Illustration25: Assembly of driving flanges (type DFN)
• Insert the spider in the cam section of the driving
flange on the driving or driven side (see illustration
26).
• Push the machines to be coupled together.
• Centre the spider between the driving flanges and
check the dimension E and S (see illustration 5 type
DF and illustration 6 type DFN).
Illustration 26: Assembly of spider
!
Having started up the coupling, the wear of spider has to be inspected at regular
maintenance intervals and the spider has to be replaced, if necessary.
Please observe protection
note ISO 16016.
Drawn:
Verified:
2022-07-05 Pz/Wb
2022-08-04 Pz
Replacing:
Replaced by:
KTR-N dated 2019-10-09
ROTEX®
Operating/Assembly instructions
AFN, BFN, CF, CFN, DF and DFN
4
KTR-N
Sheet:
Edition:
40212 EN
18 of 32
8
Assembly
4.8 Displacements - alignment of the couplings
The displacement figures specified in table 4 provide for sufficient safety to compensate for external influences
like, for example, thermal expansion or foundation settling.
In order to ensure a long service life of the coupling and avoid hazards with the use in
potentially explosive atmospheres, the shaft ends must be accurately aligned.
Please absolutely observe the displacement figures specified (see table 4). If the figures are
exceeded, the coupling will be damaged.
The more accurate the alignment of the coupling, the longer is its service life.
If used in potentially explosive atmospheres for explosion group IIC, only half of the
displacement figures (see table 4) are permissible.
!
Please note:
• The displacement figures specified in table 4 are maximum figures which must not arise in parallel. If radial
and angular displacements arise simultaneously, the permissible displacement values may only be used
proportionally (see illustration 28).
• Inspect with a dial gauge, ruler or feeler gauge whether the permissible displacement figures specified in table
4 can be observed.
Axial displacements
Radial displacements
Lmax = L + Ka [mm]
Angular displacements
Kw = L1max. - L1min. [mm]
Illustration 27: Displacements
Examples of the displacement combinations
specified in illustration 28:
Illustration 28:
Combinations of
displacement
Example 1:
Kr = 30 %
Kw = 70 %
Example 2:
Kr = 60 %
Kw = 40 %
Ktotal = Kr + Kw  100 %
Please observe protection
note ISO 16016.
Drawn:
Verified:
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2022-08-04 Pz
Replacing:
Replaced by:
KTR-N dated 2019-10-09
ROTEX®
Operating/Assembly instructions
AFN, BFN, CF, CFN, DF and DFN
4
KTR-N
Sheet:
Edition:
40212 EN
19 of 32
8
Assembly
4.8 Displacements - alignment of the couplings
Table 4: Displacement figures
Size
Max. axial displacement Ka
[mm]
Max. radial
1500 rpm
displacement Kr
3000 rpm
[mm] with n =
Max. angular
displacement Kw
with n=1500 rpm
Max. angular
displacement Kw
with n=3000 rpm
5
24
-0.5
+1.4
28
-0.7
+1.5
38
-0.7
+1.8
42
-1.0
+2.0
48
-1.0
+2.1
55
-1.0
+2.2
65
-1.0
+2.6
75
-1.5
+3.0
90
-1.5
+3.4
100
-1.5
+3.8
110
-2.0
+4.2
125
-2.0
+4.6
140
-2.0
+5.0
160
-2.5
+5.7
180
-3.0
+6.4
0.22
0.25
0.28
0.32
0.36
0.38
0.42
0.48
0.50
0.52
0.55
0.60
0.62
0.64
0.68
0.15
0.17
0.19
0.21
0.25
0.26
0.28
0.32
0.34
0.36
0.38
-
-
-
-
[degree]
0.9
0.9
1.0
1.0
1.1
1.1
1.2
1.2
1.2
1.2
1.3
1.3
1.2
1.2
1.2
[mm]
0.85
1.05
1.35
1.70
2.00
2.30
2.70
3.30
4.30
4.80
5.60
6.50
6.60
7.60
9.00
[degree]
0.8
0.8
0.8
0.8
0.9
1.0
1.0
1.0
1.1
1.1
1.1
-
-
-
-
[mm]
0.75
0.84
1.10
1.40
1.60
2.00
2.30
2.90
3.80
4.20
5.00
-
-
-
-
Start-up
Before start-up of the coupling, inspect the tightening of the setscrews in the hubs, the alignment and the distance
dimension E and adjust, if necessary, and also inspect all screw connections for the tightening torques specified.
If used in potentially explosive atmospheres the setscrews to fasten the hubs as well as all
screw connections must be secured against working loose additionally, e. g. conglutinating
with Loctite (average strength).
Finally the coupling protection against accidental contact must be fitted. It is required in accordance with
DIN EN ISO 12100 (Safety of Machinery) and directives 2014/34/EU and SI 2016 No. 1107 and must protect
against
• access with the little finger
• falling down of solid foreign objects.
The coupling protection is not part of KTR's scope of delivery and is the customer's responsibility. It must have
sufficient distance to the rotating components to avoid contact safely. Depending on the outside diameter DH of
the coupling, we recommend the following minimum distance:
ØDH to 50 mm = 6 mm, ØDH 50 mm to 120 mm = 10 mm, ØDH from 120 mm = 15 mm.
Please check if a proper enclosure (ignition protection, coupling protection, contact protection) has been mounted
and the operation of the coupling is not affected by the enclosure. The same applies for test runs and rotational
direction inspections.
The cover may provide for openings intended for necessary heat dissipation. These openings have to comply with
DIN EN ISO 13857.
The cover must be electrically conductive and included in the equipotential bonding. Bellhousings (magnesium
share below 7.5 %) made of aluminium and damping rings (NBR) can be used as connecting element between
pump and electric motor. The cover may only be taken off with standstill of the unit.
Please observe protection
note ISO 16016.
Drawn:
Verified:
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2022-08-04 Pz
Replacing:
Replaced by:
KTR-N dated 2019-10-09
ROTEX®
Operating/Assembly instructions
AFN, BFN, CF, CFN, DF and DFN
5
KTR-N
Sheet:
Edition:
40212 EN
20 of 32
8
Start-up
If the couplings are used in locations subject to dust explosion and in mining the user must
make sure that there is no accumulation of dust in a dangerous volume between the cover
and the coupling. The coupling must not operate in an accumulation of dust.
For covers with unlocked openings on the top face no light metals must be used if the
couplings are used as equipment of equipment group ll (if possible, from stainless steel).
If the couplings are used in mining (equipment group l M2), the cover must not be made of
light metal. In addition, it must be resistant to higher mechanical loads than with use as
equipment of equipment group ll.
During operation of the coupling, please pay attention to
• different operating noise
• vibrations occurring.
!
If you note any irregularities with the coupling during operation, the drive unit must be
switched off immediately. The cause of the breakdown must be specified by means of the
table „Breakdowns“ and, if possible, be eliminated according to the proposals. The potential
breakdowns specified can be hints only. To find out the cause all operating factors and
machine components must be considered.
Coating of coupling:
If coated (priming, paintings, etc.) couplings are used in potentially explosive atmospheres,
the requirements on conductibility and coating thickness must be considered. With
paintings up to 200 µm electrostatic load does not have to be expected. If thicker paintings
resp. coatings up to a layer thickness of a maximum of 2.0 mm are applied, the couplings
are not permissible for gases and vapours of category IIC in potentially explosive areas, but
only for gases and vapours of category IIA and IIB.
This also applies for multiple coatings exceeding an overall thickness of 200 µm. Make sure
with painting or coating that the coupling components are conductively connected with the
device/devices to be connected so that the equipotential bonding is not impeded by the
paint or coat applied. Basically painting of the spider is not admitted to ensure an
equipotential bonding.
In addition, make sure that the marking of the coupling remains legible.
6
Breakdowns, causes and elimination
The below-mentioned failures can lead to improper use of the ROTEX® coupling. In addition to the specifications
given in these operating/assembly instructions make sure to avoid such failures.
The errors listed can only be clues to search for the failures. When searching for the failure the adjacent
components must generally be considered.
The coupling can become a source of ignition with improper use.
Directive 2014/34/EU and UK directive SI 2016 No. 1107 require special care by the
manufacturer and the user.
Please observe protection
note ISO 16016.
Drawn:
Verified:
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2022-08-04 Pz
Replacing:
Replaced by:
KTR-N dated 2019-10-09
ROTEX®
Operating/Assembly instructions
AFN, BFN, CF, CFN, DF and DFN
6
KTR-N
Sheet:
Edition:
40212 EN
21 of 32
8
Breakdowns, causes and elimination
General failures with use other than intended:
• Important data for the coupling selection are not forwarded.
• The calculation of the shaft-hub-connection is not considered.
• Coupling components with damage occurred during transport are assembled.
• If the heated hubs are assembled, the permissible temperature is exceeded.
• The clearance of the components to be assembled is not coordinated with one another.
• Tightening torques have been fallen below/exceeded.
• Components are mixed up by mistake/assembled incorrectly.
• A wrong or no spider is inserted in the coupling.
• No original KTR components (purchased parts) are used.
• Old/already worn out spiders or spiders stored for too long are used.
• Maintenance intervals are not observed.
Breakdowns
Causes
Misalignment
Different operating
noise and/or
vibrations occuring
Wear of spider, shortterm torque
transmission due to
metal contact
Screws for axial
fastening of hubs
working loose
Wear of spider, torque
transmission due to
metal contact
Fracture of the cams
due to high impact
energy/overload
Fracture of cams
Operating parameters
do not meet with the
performance of the
coupling
Operating error of the
unit
Please observe protection
note ISO 16016.
Drawn:
Verified:
Hazard notes for
potentially explosive
atmospheres
Elimination
1) Set the unit out of operation
2) Eliminate the reason for the misalignment
Increased temperature on
(e. g. loose foundation bolts, fracture of the
the spider surface; ignition
engine mount, heat expansion of unit
risk by hot surfaces
components, modification of the installation
dimension E of the coupling)
3) For inspection of wear see chapter 10.2
1) Set the unit out of operation
2) Disassemble the coupling and remove
residues of the spider
3) Inspect coupling components and replace
Ignition risk due to
coupling components that have been
sparking
damaged
4) Insert spider, assemble coupling
components
5) Inspect alignment, adjust if necessary
1) Set the unit out of operation
2) Inspect alignment of coupling
Ignition risk due to hot
3) Tighten the screws to fasten the hubs and
surfaces and sparking
secure against working loose
4) For inspection of wear see chapter 10.2
1) Set the unit out of operation
2) Replace complete coupling
3) Inspect alignment
1) Set the unit out of operation
2) Replace complete coupling
3) Inspect alignment
4) Find out the reason for overload
Ignition risk due to
1) Set the unit out of operation
sparking
2) Review the operating parameters and select
a bigger coupling (consider mounting space)
3) Assemble new coupling size
4) Inspect alignment
1) Set the unit out of operation
2) Replace complete coupling
3) Inspect alignment
4) Instruct and train the service staff
2022-07-05 Pz/Wb
2022-08-04 Pz
Replacing:
Replaced by:
KTR-N dated 2019-10-09
ROTEX®
Operating/Assembly instructions
AFN, BFN, CF, CFN, DF and DFN
6
40212 EN
22 of 32
8
Breakdowns, causes and elimination
Breakdowns
Early wear of spider
Early wear of spider
(liquefaction of
material inside the
spider cam)
!
7
KTR-N
Sheet:
Edition:
Causes
Hazard notes for
potentially explosive
atmospheres
Elimination
1) Set the unit out of operation
2) Eliminate the reason for the misalignment
Increased temperature on
(e. g. loose foundation bolts, fracture of the
Misalignment
the spider surface; ignition
engine mount, heat expansion of unit
risk by hot surfaces
components, modification of the installation
dimension E of the coupling)
3) For inspection of wear see chapter 10.2
1) Set the unit out of operation
2) Disassemble the coupling and remove
e. g. contact with
residues of the spider
aggressive liquids/oils,
3) Inspect coupling components and replace
ozone influence, too
coupling components that have been
high/low ambient
damaged
temperatures etc.
4) Insert spider, assemble coupling
causing physical
components
modification of the
5) Inspect alignment, adjust if necessary
spider
6) Make sure that further physical modifications
of the spider are excluded
1) Set the unit out of operation
2) Disassemble the coupling and remove
residues of the spider
Ambient/contact
3) Inspect coupling components and replace
Ignition risk due to
temperatures which
coupling components that have been
sparking with metallic
are too high for the
damaged
contact of the cams
spider, max.
4) Insert spider, assemble coupling
Ignition risk due to
permissible
components
sparking with metallic
-50 °C/+120 °C
5) Inspect alignment, adjust if necessary
contact of the cams
6) Inspect and adjust ambient/contact
temperature (correct by using other spider
materials, if necessary)
1) Set the unit out of operation
2) Disassemble the coupling and remove
residues of the spider
3) Inspect coupling components and replace
coupling components that have been
damaged
Vibrations of drive
4) Insert spider, assemble coupling
components
5) Inspect alignment, adjust if necessary
6) Find out the reason for the vibrations
(possibly corrective by spider with lower or
higher Shore hardness)
When operating with a worn spider (see chapter 10.3) proper operation is not ensured.
Disposal
In respect of environmental protection we would ask you to dispose of the packaging resp. products on
termination of their service life in accordance with the legal regulations resp. standards that apply.
• Metal
Any metal components have to be cleaned and disposed of by scrap metal.
• Nylon materials
Nylon materials have to be collected and disposed of by a waste disposal company.
Please observe protection
note ISO 16016.
Drawn:
Verified:
2022-07-05 Pz/Wb
2022-08-04 Pz
Replacing:
Replaced by:
KTR-N dated 2019-10-09
ROTEX®
Operating/Assembly instructions
AFN, BFN, CF, CFN, DF and DFN
8
KTR-N
Sheet:
Edition:
40212 EN
23 of 32
8
Maintenance and service
ROTEX® is a low-maintenance coupling. We recommend to perform a visual inspection on the coupling at least
once a year. Please pay special attention to the condition of the coupling spiders.
• Since the flexible machine bearings of the driving and driven side settle during the course of load, inspect the
alignment of the coupling and re-align the coupling, if necessary.
• The coupling components have to be inspected for damages.
• The screw connections have to be inspected visually.
With the use in potentially explosive atmospheres observe chapter 10.2 "Inspection
intervals for couplings in
potentially explosive atmospheres".
9
Spares inventory, customer service addresses
We recommend to store major spare parts on site to ensure the readiness for use of the machine in case if a
coupling fails.
Contact addresses of the KTR partners for spare parts and orders can be obtained from the KTR homepage at
www.ktr.com.

KTR does not assume any liability or warranty for the use of spare parts and accessories
which are not provided by KTR and for the damages which may incur as a result.
KTR Systems GmbH
Carl-Zeiss-Str. 25
D-48432 Rheine
Phone: +49 5971 798-0
E-mail: [email protected]
Please observe protection
note ISO 16016.
Drawn:
Verified:
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2022-08-04 Pz
Replacing:
Replaced by:
KTR-N dated 2019-10-09
ROTEX®
Operating/Assembly instructions
AFN, BFN, CF, CFN, DF and DFN
10
KTR-N
Sheet:
Edition:
40212 EN
24 of 32
8
Enclosure A
Advice and instructions regarding the use in
potentially explosive atmospheres
Applicable hub designs/types:
a) Hubs that may be used in group II, category 2 and 3:
(hubs with feather keyway)
• 1.0 Hub with feather keyway and setscrew
• 1.3 Hub with spline
• 1.4 Hub with feather keyway, without setscrew
• 2.1 Clamping hub single slot with feather keyway
• 2.3 Clamping hub single slot with spline
• 2.6 Clamping hub double slot with feather keyway
• 7.1 SPLIT hub with feather keyway
• 7.6 Half shell hub (DH) with feather keyway
• 7.9 Half shell hub (H) with feather keyway
• Type AFN, BFN, CF, CFN, DF and DFN with hubs corresponding to the specifications above
b) Hubs which may be used in group II, category 3 only:
(hubs without feather keyway)
• 2.0 Clamping hub single slot without feather keyway
• 2.5 Clamping hub double slot without feather keyway
• 2.8 Clamping hub with axial slot without feather keyway
• 7.0 SPLIT hub without feather keyway
• 7.5 Half shell hub (DH) without feather keyway
• 7.8 Half shell hub (H) without feather keyway
• Type AFN, BFN, CF, CFN, DF and DFN with hubs corresponding to the specifications above
Hubs, clamping hubs or similar types without feather keyway may be used in category 3
only and are marked with category 3 accordingly.
The hub types 1.1 and 1.2 are not approved for potentially explosive atmospheres!
Please observe protection
note ISO 16016.
Drawn:
Verified:
2022-07-05 Pz/Wb
2022-08-04 Pz
Replacing:
Replaced by:
KTR-N dated 2019-10-09
ROTEX®
Operating/Assembly instructions
AFN, BFN, CF, CFN, DF and DFN
10
KTR-N
Sheet:
Edition:
40212 EN
25 of 32
8
Enclosure A
Advice and instructions regarding the use in
10.1 Intended use in
potentially explosive atmospheres
potentially explosive atmospheres
Conditions of operation in
potentially explosive atmospheres
The ROTEX® couplings are suitable for the use according to directives 2014/34/EU and SI 2016 No. 1107.
• Protection against hazards arising from lightning must follow the lightning protection concept of the machine or
plant. The relevant regulations and policy for lightning protection must be observed.
• The equipotential bonding of the couplings is made by metal contact between coupling hub and shaft. This
equipotential bonding must not be affected.
1. Industry (with the exception of mining)
•
•
•
•
Equipment group II of category 2 and 3 (coupling is not approved/not suitable for equipment group 1)
Substance group G (gases, fogs, vapours), zone 1 and 2 (coupling is not approved/not suitable for zone 0)
Substance group D (dusts), zone 21 and 22 (coupling is not approved/not suitable for zone 20)
Explosion group IIC (gases, fogs, vapours) (explosion groups IIA and IIB are included in IIC) and
explosion group IIIC (dusts) (explosion groups IIIA and IIIB are included in IIIC)
Temperature class:
Temperature class
T4
T5
T6
PUR / T-PUR®
Ambient or operating temperature Ta 1)
Max. surface temperature 2)
-30 °C to +90 °C
+110 °C
-30 °C to +75 °C
+95 °C
-30 °C to +60 °C
+80 °C
Explanation:
The maximum surface temperatures each result from the maximum permissible ambient or operating temperature T a plus the maximum
temperature increase T of 20 K to be considered. For the temperature class a safety margin subject to standard of 5 K is added.
1) The ambient or operating temperature Ta is limited to +90 °C due to the permissible permanent operating temperature of the elastomers
used.
2) The maximum surface temperature of +110 °C applies for the use in locations which are potentially subject to dust explosion.
In potentially explosive atmospheres
• the ignition temperature of dusts generated must at least be 1.5 times the surface temperature to be
considered
• the glow temperature must at least be the surface temperature to be considered plus a safety distance of 75 K.
• the gases and vapours generated must amount to the temperature class specified.
2. Mining
Equipment group I of category M2 (coupling is not approved/not suitable for equipment group M1).
Permissible ambient temperature -30 °C to +90 °C.
Please observe protection
note ISO 16016.
Drawn:
Verified:
2022-07-05 Pz/Wb
2022-08-04 Pz
Replacing:
Replaced by:
KTR-N dated 2019-10-09
ROTEX®
Operating/Assembly instructions
AFN, BFN, CF, CFN, DF and DFN
10
KTR-N
Sheet:
Edition:
40212 EN
26 of 32
8
Enclosure A
Advice and instructions regarding the use in
10.2 Inspection intervals for couplings in
Equipment category
3G
3D
M2
2G
2D
No gases and vapours of
explosion group IIC
M2
2G
2D
Gases and vapours of
explosion group IIC
potentially explosive atmospheres
potentially explosive atmospheres
Inspection intervals
For couplings operated in zone 2 or zone 22 the inspection and maintenance intervals of
the usual operating/assembly instructions for standard operation apply. During the
standard operation which has to be taken as a basis of the ignition risk analysis the
couplings are free from any ignition source. For gases, vapours and dusts generated the
permissible glow and ignition temperatures specified in chapter 10.1 have to be
considered and observed.
An inspection of the torsional backlash and a visual inspection of the flexible spider must
be performed after 3,000 operating hours for the first time, at the latest after 6 months
after start-up of the coupling.
If you note insignificant or no wear on the spider upon this initial inspection, further
inspections can each be performed after 6,000 operating hours or at the latest after 18
months, provided that the operating parameters remain the same.
If you note significant wear during the initial inspection so that it would be
recommendable to replace the spider, please find out the cause according to the table
„Breakdowns“, if possible.
The maintenance intervals must be adjusted to the modified operating parameters
without fail.
An inspection of the torsional backlash and a visual inspection of the flexible spider must
be performed after 2,000 operating hours for the first time, at the latest after 3 months
after start-up of the coupling.
If you note insignificant or no wear on the spider upon this initial inspection, further
inspections can each be performed after 4,000 operating hours or at the latest after 12
months, provided that the operating parameters remain the same.
If you note significant wear during the initial inspection so that it would be
recommendable to replace the spider, please find out the cause according to the table
„Breakdowns“, if possible.
The maintenance intervals must be adjusted to the modified operating parameters
without fail.
Hubs, clamping hubs or similar types without feather keyway may be used in category 3
only and are marked with category 3 accordingly.
Please observe protection
note ISO 16016.
Drawn:
Verified:
2022-07-05 Pz/Wb
2022-08-04 Pz
Replacing:
Replaced by:
KTR-N dated 2019-10-09
ROTEX®
Operating/Assembly instructions
AFN, BFN, CF, CFN, DF and DFN
10
KTR-N
Sheet:
Edition:
40212 EN
27 of 32
8
Enclosure A
Advice and instructions regarding the use in
10.2 Inspection intervals for couplings in
potentially explosive atmospheres
potentially explosive atmospheres
ROTEX® coupling
Illustration 29: ROTEX® coupling (example: type BFN)
Illustration 30: ROTEX® spider
Here the backlash between the cams of the coupling and the flexible spider must be inspected by means of a
feeler gauge.
When reaching the wear limit maximum friction, the spider must be replaced immediately, irrespective of the
inspection intervals.
Please observe protection
note ISO 16016.
Drawn:
Verified:
2022-07-05 Pz/Wb
2022-08-04 Pz
Replacing:
Replaced by:
KTR-N dated 2019-10-09
ROTEX®
Operating/Assembly instructions
AFN, BFN, CF, CFN, DF and DFN
10
KTR-N
Sheet:
Edition:
40212 EN
28 of 32
8
Enclosure A
Advice and instructions regarding the use in
potentially explosive atmospheres
10.3 Standard values of wear
In case of backlash > X mm, the flexible spider must be replaced.
Monitoring of the general condition of the coupling can be done both at standstill and during operation. If the
coupling is tested during operation, the operator must ensure an appropriate and proven test procedure (e. g.
stroboscopic lamp, high-speed camera, etc.) which is definitely comparable to testing at standstill. If any
distinctive features occur, an inspection must be made with the machine stopped.
Reaching the limits for replacing depends on the operating conditions and the existing operating parameters.
In order to ensure a long service life of the coupling and avoid hazards with the use in
potentially explosive atmospheres, the shaft ends must be accurately aligned.
Please absolutely observe the displacement figures specified (see table 4). If the figures are
exceeded, the coupling will be damaged.
!
Illustration 31: Inspection of the limit of wear
Illustration 32: Wear of spider
Table 5:
Size
24
28
38
42
48
55
65
75
Please observe protection
note ISO 16016.
Limits of wear (friction)
Xmax. [mm]
3
3
3
4
4
5
5
6
Drawn:
Verified:
2022-07-05 Pz/Wb
2022-08-04 Pz
Limits of wear (friction)
Xmax. [mm]
8
9
9
10
12
14
14
Size
90
100
110
125
140
160
180
Replacing:
Replaced by:
KTR-N dated 2019-10-09
ROTEX®
Operating/Assembly instructions
AFN, BFN, CF, CFN, DF and DFN
10
KTR-N
Sheet:
Edition:
40212 EN
29 of 32
8
Enclosure A
Advice and instructions regarding the use in
10.4
potentially explosive atmospheres
marking of coupling for potentially explosive atmospheres
The explosion protection marking of the ROTEX® coupling is applied on the outer sheath or on the front side.
The flexible spider is excluded.
For the complete marking refer to the operating/assembly instructions and/or the delivery note/package.
The following marking applies for the products:
• Type without aluminium, with feather keyway and/or clamping ring hub (Category 2)
I M2
II 2G
II 2D
Ex h
I
Mb
Ex h
IIC T6
… T4
Gb
Ex h
IIIC T80 °C … T110 °C Db
<Year>
-30 °C ≤ Ta ≤ +60 °C … +90 °C
KTR Systems GmbH, Carl-Zeiss-Str. 25, D-48432 Rheine
X
X
X
• Type without aluminium, without feather keyway (Category 3)
I M2
II 3G
II 3D
Ex h
I
Mb
Ex h
IIC T6
… T4
Gc
Ex h
IIIC T80 °C … T110 °C Dc
<Year>
-30 °C ≤ Ta ≤ +60 °C … +90 °C
KTR Systems GmbH, Carl-Zeiss-Str. 25, D-48432 Rheine
X
X
X
• Type with aluminium, with feather keyway and/or clamping ring hub (Category 2)
Ex h
IIC T6
… T4
Gb
Ex h
IIIC T80 °C … T110 °C Db
<Year>
-30 °C ≤ Ta ≤ +60 °C … +90 °C
KTR Systems GmbH, Carl-Zeiss-Str. 25, D-48432 Rheine
II 2G
II 2D
X
X
• Type with aluminium, without feather keyway (Category 3)
Ex h
IIC T6
… T4
Gc
Ex h
IIIC T80 °C … T110 °C Dc
<Year>
-30 °C ≤ Ta ≤ +60 °C … +90 °C
KTR Systems GmbH, Carl-Zeiss-Str. 25, D-48432 Rheine
II 3G
II 3D
X
X
Short marking:
(A short marking is only made if not possible differently for reason of space or functioning.)
ROTEX®
<Year>
Please observe protection
note ISO 16016.
Drawn:
Verified:
2022-07-05 Pz/Wb
2022-08-04 Pz
Replacing:
Replaced by:
KTR-N dated 2019-10-09
ROTEX®
Operating/Assembly instructions
AFN, BFN, CF, CFN, DF and DFN
10
40212 EN
30 of 32
8
Enclosure A
Advice and instructions regarding the use in
10.4
KTR-N
Sheet:
Edition:
potentially explosive atmospheres
marking of coupling for potentially explosive atmospheres
Deviating marking applied until 31st October 2019:
Short marking:
II 2GD c IIC T X/I M2 c X
Complete marking:
(valid for T-PUR® only)
II 2G c IIC T6, T5, T4 resp. T3 -50 °C  Ta  +65 °C, +80 °C,
+115 °C resp. +120 °C
II 2D c T 140 °C/I M2 c -50 °C  Ta  +120 °C
Complete marking:
(valid for PUR only)
II 2G c IIC T6, T5 resp. T4 -30 °C  Ta  +65 °C, +80 °C resp.
+90 °C
II 2D c T 110 °C/I M2 c -30 °C  Ta  +90 °C
Comments on marking
Equipment group I
Equipment group II
Equipment category 2G
Equipment category 3G
Equipment category 2D
Equipment category 3D
Equipment category M2
Mining
Non-mining
Equipment ensuring a high level of safety, suitable for zone 1
Equipment ensuring a normal level of safety, suitable for zone 2
Equipment ensuring a high level of safety, suitable for zone 21
Equipment ensuring a normal level of safety, suitable for zone 22
Equipment ensuring a high level of safety must be able to be switched off
when an explosive atmosphere occurs
D
Dust
G
Gases and vapours
Ex h
Nonelectrical explosion protection
IIC
Gases and vapours of class IIC (including IIA and IIB)
IIIC
Electrically conductive dusts of class IIIC (including IIIA and IIIB)
T6 … T4
Temperature class to be considered, depending on the ambient temperature
T80 °C … T110 °C
Maximum surface temperature to be considered, depending on the ambient
temperature
-30 °C ≤ Ta ≤ +60 °C … +90 °C or Permissible ambient temperature from -30 °C to +60 °C resp.
-30 °C ≤ Ta ≤ +90 °C
-30 °C to +90 °C
Gb, Db, Mb
Equipment protection level, high level of safety, analogous to the equipment
category
Gc, Dc
Equipment protection level, normal level of safety, analogous to the
equipment category
X
For a safe use of the couplings particular conditions apply
If the symbol
was punched in addition to marking , the coupling component was supplied by KTR as an
unbored or pilot bored version (see chapter 4.2 of the present operating/assembly instructions).
Please observe protection
note ISO 16016.
Drawn:
Verified:
2022-07-05 Pz/Wb
2022-08-04 Pz
Replacing:
Replaced by:
KTR-N dated 2019-10-09
ROTEX®
Operating/Assembly instructions
AFN, BFN, CF, CFN, DF and DFN
10
KTR-N
Sheet:
Edition:
40212 EN
31 of 32
8
Enclosure A
Advice and instructions regarding the use in
potentially explosive atmospheres
10.5 EU Certificate of conformity
EU Declaration of Conformity resp.
Certificate of Conformity
corresponding to EU directive 2014/34/EU dated 26 February 2014
and to the legal regulations adopted for its implementation
The manufacturer - KTR Systems GmbH, Carl-Zeiss-Str. 25, D-48432 Rheine - states that the
flexible ROTEX® couplings
in an explosion-proof design described in these assembly instructions are equipment resp.
components corresponding to article 2, 1. of directive 2014/34/EU and comply with the general safety
and health specifications according to enclosure II of directive 2014/34/EU.
This declaration of conformity is issued under the sole responsibility of the manufacturers
KTR Systems GmbH.
The coupling described in here complies with the specifications of the following standards/rules:
EN ISO 80079-36:2016-12
EN ISO 80079-37:2016-12
EN ISO/IEC 80079-38:2017-10
IEC/TS 60079-32-1:2020-01-24
The ROTEX® is in accordance with the specifications of directive 2014/34/EU.
According to article 13 (1) b) ii) of directive 2014/34/EU the technical documentation is deposited with
the notified body (type examination certificate IBExU13ATEXB016 X):
IBExU
Institut für Sicherheitstechnik GmbH
Identification number: 0637
Fuchsmühlenweg 7
09599 Freiberg
Rheine,
Place
2022-07-05
Date
Please observe protection
note ISO 16016.
Drawn:
Verified:
i. V.
Reinhard Wibbeling
Engineering/R&D
2022-07-05 Pz/Wb
2022-08-04 Pz
i. V.
Michael Brüning
Product Manager
Replacing:
Replaced by:
KTR-N dated 2019-10-09
ROTEX®
Operating/Assembly instructions
AFN, BFN, CF, CFN, DF and DFN
10
KTR-N
Sheet:
Edition:
40212 EN
32 of 32
8
Enclosure A
Advice and instructions regarding the use in
potentially explosive atmospheres
10.6 UK Declaration of conformity
UK Declaration of Conformity resp.
Certificate of Conformity
corresponding to UK directive SI 2016 No. 1107 dated 26 February 2014
and to the legal provisions adopted for its implementation
The manufacturer - KTR Systems GmbH, Carl-Zeiss-Str. 25, D-48432 Rheine - states that the
flexible ROTEX® couplings
in an explosion-proof design described in these assembly instructions are equipment resp.
components corresponding to directive SI 2016 No. 1107 and comply with the general safety and
health requirements according to directive SI 2016 No. 1107.
This declaration of conformity resp. certificate of conformity is issued under the sole responsibility of
the manufacturer KTR Systems GmbH.
The coupling described in here complies with the specifications of the following standards/rules:
EN ISO 80079-36:2016-12
EN ISO 80079-37:2016-12
EN ISO/IEC 80079-38:2017-10
IEC/TS 60079-32-1:2020-01-24
The ROTEX® is in accordance with the specifications respectively the applicable specifications of
directive SI 2016 No. 1107.
According to directive SI 2016 No. 1107 the technical documentation is deposited with the notified
body:
Eurofins CML
Identification number: 2503
Rheine,
Place
2022-07-05
Date
Please observe protection
note ISO 16016.
Drawn:
Verified:
i. V.
Reinhard Wibbeling
Engineering/R&D
2022-07-05 Pz/Wb
2022-08-04 Pz
i. V.
Michael Brüning
Product Manager
Replacing:
Replaced by:
KTR-N dated 2019-10-09
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