KTR RADEX-N Operating/Mounting Instructions

RADEX®-N
Operating/Assembly instructions
KTR-N
Sheet:
Edition:
47110 EN
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26
RADEX®-N
Steel laminae couplings types
NN, NANA 1 to 4,
NENA 1 and 2, NENE 1,
NNZ, NNW
RADEX®-N type NN
according to directive 2014/34/EU
and UK directive SI 2016 No. 1107
RADEX®-N type NANA 1
RADEX®-N type NNZ
RADEX®-N type NANA 4
RADEX®-N type NNW
Please observe protection
note ISO 16016.
Drawn:
Verified:
2022-07-06 Pz/Wb
2022-08-08 Pz
Replacing:
Replaced by:
KTR-N dated 2021-05-04
RADEX®-N
Operating/Assembly instructions
KTR-N
Sheet:
Edition:
47110 EN
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RADEX®-N is a torsionally stiff flexible steel laminae coupling. It is able to compensate for shaft
misalignment, for example caused by thermal expansion, etc.
Table of contents
1
Technical data
3
2
Advice
7
2.1
2.2
2.3
2.4
2.5
2.6
7
8
8
8
9
9
3
4
General advice
Safety and advice symbols
General hazard warnings
Intended use
Coupling selection
Reference to EC Machinery Directive 2006/42/EC
Storage, transport and packaging
9
3.1
3.2
9
9
Storage
Transport and packaging
Assembly
10
4.1 Components of the coupling
4.2 Advice for finish bore
4.3 Assembly/disassembly of flange hubs
4.4 Assembly/disassembly of clamping ring hubs
4.5 General advice for assembly of spacer
4.6 Vertical assembly/disassembly
4.7 Assembly/disassembly of laminae sets, RADEX®-N size 20 - 135
4.8 Assembly/disassembly of laminae sets, RADEX®-N size 136 - 336 and 138 - 338
4.9 Tightening torques of screw connections on the laminae set
4.10 Displacements - alignment of the coupling
10
13
14
15
17
18
19
20
22
22
5
Start-up
24
6
Breakdowns, causes and elimination
25
7
Disposal
27
8
Maintenance and service
27
9
Spares inventory, customer service addresses
27
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
Please observe protection
note ISO 16016.
Drawn:
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28
potentially explosive atmospheres
10.3
marking of coupling for potentially explosive atmospheres
10.4 EU Declaration of conformity
10.5 UK Declaration of conformity
2022-07-06 Pz/Wb
2022-08-08 Pz
Replacing:
Replaced by:
28
29
30
32
33
KTR-N dated 2021-05-04
RADEX®-N
Operating/Assembly instructions
1
KTR-N
Sheet:
Edition:
47110 EN
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26
Technical data
Illustration 1: RADEX®-N type NN
Illustration 2: RADEX®-N type NANA 1
Illustration 3: RADEX®-N type NANA 2
Illustration 4: RADEX®-N type NENA 1
Illustration 5: RADEX®-N type NENE 1
Illustration 6: RADEX®-N type NENA 2
Dimensions of couplings see table 1, sheet 4.
Please observe protection
note ISO 16016.
Drawn:
Verified:
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2022-08-08 Pz
Replacing:
Replaced by:
KTR-N dated 2021-05-04
KTR-N
Sheet:
Edition:
RADEX®-N
Operating/Assembly instructions
1
47110 EN
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26
Technical data
Table 1: Types NN - NANA 1 - NANA 2 - NENA 1 - NENE 1 - NENA 2
Size
20
25
35
38
42
50
60
70
80
85
90
105
115
135
136
156
166
186
206
246
286
336
138
158
168
188
208
248
288
338
Dimensions 1) [mm]
General
L
Max. finish
bore [mm]
D
D1
DN
DN1
DH
20
25
38
42
50
55
65
75
85
90
100
110
120
135
135
150
170
190
210
245
290
340
135
150
170
190
210
245
290
340
55
65
75
80
85
90
100
115
-
32
40
54
58
68
78
88
102
117
123
132
147
163
184
180
195
225
250
275
320
383
445
180
195
225
250
275
320
383
445
77
90
104
112
119
128
145
160
-
56
68
82
94
104
126
138
156
179
191
210
225
265
305
300
325
350
380
420
500
567
660
300
325
350
380
420
500
567
660
L1,
L2
20
25
40
45
45
55
55
65
75
80
80
90
100
135
135
150
165
185
200
240
280
330
135
150
165
185
200
240
280
330
DBSE
NN
NANA1
NANA2
NENA1
NENE1
NENA2
NN
NANA1
NANA2
NENA1
NENE1
NENA2
45
56
86
98
100
121
121
141
164
175
175
200
223
297
293
327
361
401
437
524
612
718
293
327
361
401
437
524
612
718
100
110
150
170
170
206
206
246
286
300
300
340
370
520
170
200
233
246
251
281
309
-
160
190
220
232
233
263
288
-
114
134
154
164
166
186
206
-
124
144
167
178
184
204
227
-
5
6
6
8
10
11
11
11
14
15
15
20
23
27
23
27
31
31
37
44
52
58
23
27
31
31
37
44
52
58
60
60
70
80
80
96
96
116
136
140
140
160
170
250
60
70
83
86
91
101
109
-
50
60
70
72
73
83
88
-
4
4
4
4
6
6
6
-
14
14
17
18
24
24
27
-
According to customer
specification
According to customer
specification
1) For dimensions of setscrews (dimension G and T) see table 4.
!
In case if a dimensional drawing was prepared for the coupling, the dimensions specified
have to be primarily observed.
The operator of the machine should be provided with the dimensional drawing.
Please observe protection
note ISO 16016.
Drawn:
Verified:
2022-07-06 Pz/Wb
2022-08-08 Pz
Replacing:
Replaced by:
KTR-N dated 2021-05-04
RADEX®-N
Operating/Assembly instructions
1
KTR-N
Sheet:
Edition:
47110 EN
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26
Technical data
Illustration 7: RADEX®-N type NNZ
Illustration 8: RADEX®-N type NANA 3
Illustration 9: RADEX®-N type NANA 4
Illustration 10: RADEX®-N type NNW
Dimensions of couplings see table 2, sheet 6.
Please observe protection
note ISO 16016.
Drawn:
Verified:
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2022-08-08 Pz
Replacing:
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KTR-N
Sheet:
Edition:
RADEX®-N
Operating/Assembly instructions
1
47110 EN
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Technical data
Table 2: Types NNZ - NANA 3 - NANA 4 - NNW
DH
L1, L2
20
25
38
42
50
55
65
75
85
90
100
110
120
135
135
150
170
190
210
245
290
340
135
150
170
190
210
245
290
340
32
40
54
58
68
78
88
102
117
123
132
147
163
184
180
195
225
250
275
320
383
445
180
195
225
250
275
320
383
445
56
68
82
94
104
126
138
156
179
191
210
225
265
305
300
325
350
380
420
500
567
660
300
325
350
380
420
500
567
660
20
25
40
45
45
55
55
65
75
80
80
90
100
135
135
150
165
185
200
240
280
330
135
150
165
185
200
240
280
330
20
25
35
38
42
50
60
70
80
85
90
105
115
135
136
156
166
186
206
246
286
336
138
158
168
188
208
248
288
338
NNZ
58
70
102
118
124
144
144
166
-
NNZ
18
20
22
28
34
34
34
36
-
DBSE
NANA4
NNW
L11
8
8
10
12
14
12
12
14
-
Intermediate shaft dimension according to customer specification
DN
Dimensions 1) [mm]
General
L
NANA4
NNW
L = L1 + L2 + DBSE
Size
Max. finish bore
[mm]
D
1) For further dimensions of type NANA 3 (L and DBSE) see table 3.
For dimensions of setscrews (dimension G and T) see table 4.
Table 3: Further dimensions of type NANA 3
Size
L
DBSE
190
100
Size
L
DBSE
260
100
Size
L
DBSE
!
42
230
140
50
250
140
210
100
290
180
210
100
85
136
300
140
156
340
180
166
186
410
250
208
300
140
246
60
250
140
290
180
230
100
90
340
180
410
250
320
140
286
336
138
70
270
140
158
80
310
180
250
100
105
360
180
430
250
168
188
290
140
330
180
115
380
180
208
450
250
248
400
250
135
520
250
288
338
As specified by the customer
In case if a dimensional drawing was prepared for the coupling, the dimensions specified
have to be primarily observed.
The operator of the machine should be provided with the dimensional drawing.
Please observe protection
note ISO 16016.
Drawn:
Verified:
2022-07-06 Pz/Wb
2022-08-08 Pz
Replacing:
Replaced by:
KTR-N dated 2021-05-04
KTR-N
Sheet:
Edition:
RADEX®-N
Operating/Assembly instructions
1
47110 EN
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Technical data
Table 4: Dimensions of setscrews
Size
G
T
Number Z
20
M5
6
1
25
M5
8
1
Size
G
T
Number Z
135
M20
136
M12
1
2
35
M6
15
1
38
M6
15
1
42
M8
20
1
156
M12
166
M16
186
M16
206
M16
2
2
2
2
50
M8
20
1
60
M8
20
1
70
M10
20
1
246
286
336
138
158
M20 M20 M24 M12 M12
As specified by the customer
2
2
2
2
2
80
M10
20
1
85
M10
25
1
90
M12
25
1
105
M12
30
1
115
M12
30
1
168
M16
188
M16
208
M16
248
M20
288
M20
338
M24
2
2
2
2
2
2
Table 5: Torque and speed
Size
TKN
Torque [Nm]
TK max
TKW
Max. speed n [rpm]
Size
TKN
Torque [Nm]
TK max
TKW
Max. speed n [rpm]
Size
TKN
Torque [Nm]
TK max
TKW
Max. speed n [rpm]
20
30
60
15
20400
25
60
120
30
16800
35
120
240
60
13900
38
240
480
120
12000
42
320
640
160
11000
50
470
940
235
9000
60
900
1800
450
8200
70
1300
2600
650
7300
80
1800
3600
900
6300
85
2600
5200
1300
5900
90
4600
9200
2300
5400
105
5600
11200
2800
5000
115
9900
19800
4950
4300
135
13500
27000
6750
3700
136
17500
35000
8750
3800
156
25000
50000
12500
3500
166
35000
70000
17500
3300
186
42000
84000
21000
3000
206
52500
105000
26250
2800
246
90000
180000
45000
2300
286
150000
300000
75000
2000
336
210000
420000
105000
1800
138
23000
46000
11500
3800
158
33000
66000
16500
3500
168
45000
90000
22500
3300
188
56000
112000
28000
3000
208
70000
140000
35000
2800
248
120000
240000
60000
2300
288
200000
400000
100000
2000
338
280000
560000
140000
1800
RADEX®-N 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.
2
Advice
2.1 General advice
Please read through these operating/assembly instructions carefully before you start up the coupling.
Pay special attention to the safety instructions!
The RADEX®-N 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.
Please observe protection
note ISO 16016.
Drawn:
Verified:
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2022-08-08 Pz
Replacing:
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KTR-N dated 2021-05-04
RADEX®-N
Operating/Assembly instructions
2
KTR-N
Sheet:
Edition:
47110 EN
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26
Advice
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.
2.4 Intended 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 RADEX®-N described in here corresponds to the technical status at the time of printing of these
operating/assembly instructions.
Please observe protection
note ISO 16016.
Drawn:
Verified:
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2022-08-08 Pz
Replacing:
Replaced by:
KTR-N dated 2021-05-04
RADEX®-N
Operating/Assembly instructions
2
KTR-N
Sheet:
Edition:
47110 EN
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26
Advice
2.5 Coupling selection
!
For a permanently 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 "RADEX®-N").
Please observe the critical whirling speed with types NANA 4 and NNW.
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 laminae set only. The
transmittable torque of the shaft-hub-connection must be reviewed by the customer and is
subject to his responsibility.
If used in potentially explosive atmospheres clamping set connections and shrink fit
connections (transverse interference fits) without feather key must be selected in that there
is a minimum safety factor of s = 2.0 between the peak torque of the machine including all
operating parameters and the frictional locking torque of the shaft-hub-connection. The
responsibility for the shaft-hub-connection is subject to the customer. Please review the
connection carefully.
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.
3
Storage, transport and packaging
3.1 Storage
The couplings are supplied in preserved condition and can be stored in a dry and roofed place for 6 - 9 months.
!
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.
Please observe protection
note ISO 16016.
Drawn:
Verified:
2022-07-06 Pz/Wb
2022-08-08 Pz
Replacing:
Replaced by:
KTR-N dated 2021-05-04
KTR-N
Sheet:
Edition:
RADEX®-N
Operating/Assembly instructions
4
47110 EN
10 of 33
26
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 RADEX®-N type NN
Component
1
2
3
4
Quantity
2
1
see table 6
Description
Flange hub 1)
Laminae set
Spacer
Dowel screw
Component
5
6
7
8
Quantity
see table 6
see table 6
see table 6
2
Description
Spacer sleeve
Washer
Hexagon nut/clamping nut
Setscrew DIN EN ISO 4029
1) Design as clamping ring hub (frictionally engaged shaft-hub-connection) on request
Illustration 11: RADEX®-N type NN
Components of RADEX®-N type NANA 1 to 3 - NENA 1 and 2 - NENE 1
Component
1
2
3
4
Quantity
2
2
1
see table 6
Description
Flange hub 1)
Laminae set
Spacer
Dowel screw
Component
5
6
7
8
Quantity
see table 6
see table 6
see table 6
2
Description
Spacer sleeve
Washer
Hexagon nut/clamping nut
Setscrew DIN EN ISO 4029
1) Design as clamping ring hub (frictionally engaged shaft-hub-connection) on request
Illustration 12: RADEX®-N type NANA 1 (example)
Please observe protection
note ISO 16016.
Drawn:
Verified:
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KTR-N
Sheet:
Edition:
RADEX®-N
Operating/Assembly instructions
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47110 EN
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Assembly
4.1 Components of the coupling
Components of RADEX®-N type NNZ
Component
1
2
3
4
Quantity
2
2
1
see table 6
Description
Flange hub 1)
Laminae set
Spacer
Dowel screw
Component
5
6
7
8
Quantity
see table 6
see table 6
see table 6
2
Description
Spacer sleeve
Washer
Hexagon nut/clamping nut
Setscrew DIN EN ISO 4029
1) Design as clamping ring hub (frictionally engaged shaft-hub-connection) on request
Illustration 13: RADEX®-N type NNZ
Components of RADEX®-N type NANA 4
Component
1
2
Quantity
2
2
3
1
4
see table 6
Description
Flange hub 1)
Laminae set
Intermediate pipe with 2
flange hubs spec. - welded
Dowel screw
Component
5
6
7
8
Quantity
see table 6
see table 6
see table 6
2
Description
Spacer sleeve
Washer
Hexagon nut/clamping nut
Setscrew DIN EN ISO 4029
1) Design as clamping ring hub (frictionally engaged shaft-hub-connection) on request
Illustration 14: RADEX®-N type NANA 4
Please observe protection
note ISO 16016.
Drawn:
Verified:
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2022-08-08 Pz
Replacing:
Replaced by:
KTR-N dated 2021-05-04
KTR-N
Sheet:
Edition:
RADEX®-N
Operating/Assembly instructions
4
47110 EN
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Assembly
4.1 Components of the coupling
Components of RADEX®-N type NNW
Component
1
2
Quantity
4
2
3
1
4
see table 6
Description
Flange hub 1)
Laminae set
Intermediate shaft with 2
feather keys
Dowel screw
Component
5
6
7
8
Quantity
see table 6
see table 6
see table 6
2
Description
Spacer sleeve
Washer
Hexagon nut/clamping nut
Setscrew DIN EN ISO 4029
1) Design as clamping ring hub (frictionally engaged shaft-hub-connection) on request
Illustration 15: RADEX®-N type NNW
Table 6: Number of single parts
Size
Dowel screw (item 4) 1)
Spacer sleeve (item 5) 1)
Washer (item 6) 1) 2)
Hexagon nut/Clamping nut (item 7) 1)
20
4
4
4
25
4
4
4
35
4
4
4
38
4
4
4
42
4
4
4
50
4
4
4
60
6
6
6
70
6
6
6
80
6
6
6
85
6
6
6
Size
Dowel screw (item 4) 1)
Spacer sleeve (item 5) 1)
Washer (item 6) 1) 2)
Hexagon nut/Clamping nut (item 7) 1)
90
6
6
6
105
6
6
6
115
6
6
6
135
6
6
6
136
6
6
156
6
6
6
166
6
6
186
6
6
206
6
6
246
6
6
Size
Dowel screw (item 4) 1)
Spacer sleeve (item 5) 1)
Washer (item 6) 1) 2)
Hexagon nut/Clamping nut (item 7) 1)
286
6
6
336
6
6
138
8
8
158
8
8
8
168
8
8
188
8
8
208
8
8
248
8
8
288
8
8
338
8
8
1) Number each laminae set
2) With size 156 and 158 washer below the screw head
Please observe protection
note ISO 16016.
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Assembly
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.
• Bores of flange hubs machined by the customer have to observe
concentricity resp. axial runout (see illustration 16).
• Make absolutely sure to observe the figures for ØD.
• Carefully align the flange hubs when the finish bores are drilled.
• Provide for a setscrew according to DIN EN ISO 4029 with a cup
point or an end plate to fasten the flange hubs axially.
Illustration 16: Concentricity and axial runout
!
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 7: Setscrew DIN EN ISO 4029
Size
G
T
Number Z
Tightening torque TA
[Nm]
20
M5
6
1
25
M5
8
1
35
M6
15
1
38
M6
15
1
42
M8
20
1
50
M8
20
1
60
M8
20
1
70
M10
20
1
80
M10
20
1
85
M10
25
1
90
M12
25
1
105
M12
30
1
115
M12
30
1
2
2
4.8
4.8
10
10
10
17
17
17
40
40
40
Size
G
T
Number Z
Tightening torque TA
[Nm]
135
M20
136
M12
156
M12
166
M16
186
M16
206
M16
1
2
2
2
2
140
40
40
80
80
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168
M16
188
M16
208
M16
248
M20
288
M20
338
M24
2
246 286 336 138 158
M20 M20 M24 M12 M12
As specified by the customer
2
2
2
2
2
2
2
2
2
2
2
80
140
80
80
80
140
140
240
140
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240
40
40
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Assembly
4.3 Assembly/disassembly of flange hubs

We recommend to inspect bores, shaft, keyway and feather key for dimensional accuracy
before assembly.
Heating the flange hubs lightly (approx. 80 °C) allows for an easier mounting onto the shafts.
Pay attention to the ignition risk in potentially explosive atmospheres!
STOP
!
Touching the heated hubs causes burns.
Please wear safety gloves.
With the assembly please make sure that the distance dimension DBSE (see table 1 to 3) is
observed so that the coupling components are not in contact with each other during the
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).
For the axial alignment of the coupling the distance dimension DBSE (see table 1 to 3) is decisive. In order to set
the right DBSE dimension you should proceed as follows:
• Mount the flange hubs on the shaft of driving and driven side (see illustration 17).
• The internal sides of the flange hubs must be flush with the front sides of the shafts (see illustration 17).
• Shift the power packs in axial direction until the distance dimension DBSE is achieved (see table 1 to 3).
• Fasten the flange hubs by tightening the setscrews DIN EN ISO 4029 with a cup point (tightening torque see
table 7).
Illustration 17: Assembly of flange hubs
Disassembly:
STOP
Driving components falling down may cause injury to persons or damage on the machine.
Secure the driving components before disassembly.
• Release the setscrew in the hub and unscrew it by 2 - 3 pitches.
• Pull the hub from the shaft.
Please observe protection
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Assembly
4.4 Assembly/disassembly of clamping ring hubs
!

!
The stiffness and dimensions of the shafts (here specifically hollow shafts) have to be
designed in a way that sufficient safety against plastic deformation is provided for (if
necessary, consult with company KTR).
We recommend to inspect bores and shafts for dimensional accuracy before assembly.
With the assembly please make sure that the distance dimension DBSE (see table 1 to 3) is
observed so that the coupling components are not in contact with each other during the
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).
For the axial alignment of the coupling the distance dimension DBSE (see table 1 to 3) is decisive. In order to set
the right DBSE dimension you should proceed as follows:
• Clean and degrease the hub bores and shafts, afterwards lubricate with a thin oil (e. g. Castrol 4 in 1 or Klüber
Quietsch-Ex).
!
Oils and greases containing molybdenum disulfide or other high-pressure additives as well
as internal lubricants must not be used.
• Lightly unscrew the clamping screws and pull the clamping ring from the clamping ring hub only marginally to
make sure the clamping ring is fitted loosely.
• Mount the clamping ring hubs on the shaft of driving and driven side (see illustration 18).
• The internal sides of the clamping ring hubs must be flush with the front sides of the shafts (see illustration 18).
• Shift the power packs in axial direction until the distance dimension DBSE is achieved (see table 1 to 3).
• Tighten the clamping screws evenly crosswise first with 1/3 and afterwards 2/3 of the full tightening torque
(see table 8). Afterwards tighten the clamping screws crosswise at the full tightening torque. The process
needs to be repeated until the tightening torque has been achieved with all screws.
Illustration 18: Assembly of clamping ring hubs
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Assembly
4.4 Assembly/disassembly of clamping ring hubs
Table 8: Tightening torques of clamping screws
Size
Clamping screws
Tightening torque TA
[Nm]
35
M5
38
M6
42
M6
50
M8
60
M8
70
M8
80
M10
85
M12
90
M12
105
M12
115
M12
135
M16
8.5
14
14
35
35
35
69
120
120
120
120
295
Having started up the coupling, the coupling has to be inspected for damages at regular
maintenance intervals and it has to be replaced, if necessary.
!
Disassembly:
STOP
Driving components falling down may cause injury to persons or damage on the machine.
Secure the driving components before disassembly.
• Unscrew the clamping screws evenly one after another. During each revolution every screw may only be
unscrewed by half a turn. Unscrew all clamping screws by 3 - 4 pitches.
• Remove the screws located next to the extraction threads and screw them into the intended extraction threads
until they fit.
• The clamping ring is released by tightening the screws in the extraction threads evenly gradually and
crosswise.
Illustration 19: Disassembly of clamping ring hub type 6.0
Illustration 20: Disassembly of clamping ring hub type 6.5
• Before re-assembly the hub bores and shafts have to be cleaned and afterwards lubricated with a thin oil (e. g.
Castrol 4 in 1 or Klüber Quietsch-Ex). The same applies for the taper surfaces of clamping ring hub and
clamping ring.
!
If these hints are not observed, the operation of the clamping ring hub may be affected.
Please observe protection
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Assembly
4.5 General advice for assembly of spacer
If the coupling is supplied with a transportation lock (optionally), the
following has to be observed:
!
•
The spacer sleeves (steel) have to be removed for
further assembly and operation (see illustration 21).
Disassemble the transport screws and spacer sleeves.
Illustration 21: Transport lock
If the coupling is supplied with limitation for axial clearance
(optionally), the following has to be observed:
•
Before mounting the spacer, remove the screws and sleeves for
limitation of axial clearance.
•
Having mounted the spacer completely, re-assemble the screws
and sleeves for limitation of axial clearance (see illustration 22).
Please observe the axial clearance S as per dimension sheet.
•
Secure the screws against working loose by means of a highstrength adhesive (e. g. omniFIT 230M or Loctite 2701).
!
Illustration 22: Limitation of axial clearance
Please consider whether a limitation for axial clearance with two nylon sleeves per screw or
one transport lock with one steel sleeve per screw was installed (see illustration 21 and 22).
Marking of balancing (optional)
•
With the assembly of the spacer observe correct alignment of the marking for balancing. The marking for
balancing X (Y) of the hub, as an example, must be flush with the marking for balancing X (Y) of the spacer
(see illustration 23).
Illustration 23: Alignment of spacer
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Assembly
4.6 Vertical assembly/disassembly
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).
For vertical alignment of the coupling the distance dimension DBSE (see table 1 to 3) is decisive. In order to set
the right DBSE dimension you should proceed as follows:
• Mount the flange hubs on the shaft of driving and driven side. Make sure the flange hub with the disk for
vertical support is at the bottom (see illustration 24 and 25 as an alternative).
• The internal side of the flange hub on top or centering surface of the flange hub at the bottom must be flush
with the front sides of the shafts (see illustration 24 and 25 as an alternative).
• Shift the power packs in axial direction until the distance dimension DBSE is achieved (see table 1 to 3).
• Fasten the flange hubs by tightening the setscrews DIN EN ISO 4029 with a cup point (tightening torque see
table 7).

With the assembly of a spacer make sure the flange hub with the disk for vertical support is
at the bottom.
Illustration 24: Vertical assembly (preferred assembly version)
Illustration 25: Vertical assembly (as an alternative)
Disassembly:
STOP
Driving components falling down may cause injury to persons or damage on the machine.
Secure the driving components before disassembly.
• Release the setscrew in the hub and unscrew it by 2 - 3 pitches.
• Pull the hub from the shaft.
Please observe protection
note ISO 16016.
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Assembly
4.7 Assembly/disassembly of laminae sets, RADEX®-N size 20 - 135
!
With the assembly make sure that the laminae sets are installed free from distortion in axial
direction. Disregarding this advice may cause damage to the coupling.
• Clean and degrease the contact surfaces of screw connections on the flange hub, laminae set and spacer.
• Assemble the laminae sets and the spacer (see illustration 26 respectively 27). With type NN only 1 laminae
set is used (no spacer).
• Hand-tighten the components for the time being, the dowel screws to be assembled reciprocally (see
illustration 26 resprectively 27).
• Tighten the hexagon nuts one after the other and with several revolutions to the tightening torque specified in
table 11. Protect the dowel screw from rotating.
Laminae set
Illustration 26: Assembly of laminae sets, RADEX®-N size 20 - 70
Laminae set
Illustration 27: Assembly of laminae sets, RADEX®-N size 80 - 135
Table 9:
Size
Pitch circle ØD4
20
44
25
53
35
67
38
75
42
85
50
100
60
112
70
128
80
148
85
158
90
170
105
185
115
214
135
240
Disassembly:
STOP
Driving components falling down may cause injury to persons or damage on the machine.
Secure the driving components before disassembly.
• Unscrew the hexagon nuts and remove along with the dowel screws and disks.
• Take out the laminae sets.
Please observe protection
note ISO 16016.
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Assembly
4.8 Assembly/disassembly of laminae sets, RADEX®-N size 136 - 336 and 138 - 338
!
With the assembly make sure that the laminae sets are installed free from distortion in axial
direction. Disregarding this advice may cause damage to the coupling.
• Clean and degrease the contact surfaces of screw connections on the flange hub, laminae set and spacer as
well as the threads of the clamping nut and dowel screw.
• Insert the laminae sets and the spacer (see illustration 28). With type NN only 1 laminae set is used (no
spacer).
• Hand-tighten the components for the time being, the dowel screws to be assembled reciprocally (see
illustration 28). With size 156 and 158 use a washer under the screw head.
• The pressure screws in the clamping nut must not protrude on the pressure side (see illustration 29).
!
All components must be superimposed without any gap.
• Afterwards turn back the clamping nut until there is a gap of 1 - 2 mm (see illustration 29).
• Hand-tighten the pressure screws marked in illustration 31.
• Tighten these screws (see illustration 31) at half the tightening torque according to table 11 and afterwards at
the full tightening torque according to table 11.
• Now tighten all pressure screws one after another and with several revolutions until all screws have achieved
the full tightening torque (see illustration 32).
!
The pressure screws must not bear on the heads after assembly (see illustration 30).
• All clamping nuts have to be mounted as per the aforementioned process.
Laminae set
Illustration 28: Assembly of the laminae sets, RADEX®-N size 136 - 336 and 138 - 338
Illustration 29
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Assembly
4.8 Assembly/disassembly of laminae sets, RADEX®-N size 136 - 336 and 138 - 338
pitch 8
pitch 9
pitch 10
pitch 11
Illustration 31: Tightening of pressure screws
pitch 8
pitch 9
pitch 10
pitch 11
Illustration 32: Tightening of pressure screws (one after another)
Table 10:
Size
Pitch circle ØD4
136 / 138
240
156 / 158
260
166 / 168
290
186 / 188
320
206 / 208
350
246 / 248
410
286 / 288
480
336 / 338
550
Disassembly:
STOP
Driving components falling down may cause injury to persons or damage on the machine.
Secure the driving components before disassembly.
• Untighten the pressure screws of the clamping nut with several revolutions each by a quarter revolution until
all screws are released from tension.
!
Do not relieve and unscrew individual pressure screws completely in any case.
• Unscrew the clamping nuts and remove the washers.
• Take out the laminae sets.
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Assembly
4.9 Tightening torques of screw connections on the laminae set
Table 11: Tightening torque of screw connections on the laminae set
Size
Dimension M [mm]
Tightening torque TA [Nm]
20
M5
8.5
25
M6
14
35
M6
14
38
M8
35
42
M8
35
50
M10
69
60
M8
33
Size
Dimension M1 [mm]
Tightening torque TA [Nm]
70
M10
65
80
M10
65
85
M12
115
90
M16
280
105
M16
280
115
M20
550
135
M24
900
Size
Dimension M [mm]
Dimension M1 [mm]
Pressure screw M1
Tightening torque TA [Nm]
136 / 138
M24
8 x M8
156 / 158
M27
9 x M8
166 / 168
M27
9 x M8
186 / 188
M27
9 x M8
206 / 208
M30
8 x M10
246 / 248
M36
8 x M12
286 / 288
M42
10 x M12
336 / 338
M48
11 x M12
30
30
30
30
60
105
105
105
Having started up the coupling, the coupling has to be inspected for damages at regular
maintenance intervals and it has to be replaced, if necessary.
!
4.10 Displacements - alignment of the coupling
The displacement figures specified in table 12 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 12). 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 12) are permissible.
!
Please note:
• The displacement figures specified in table 12 are maximum figures which must not arise in parallel. If axial,
radial and angular displacement arises at the same time, these values must be reduced (see illustration 34).
• Please inspect with a dial gauge, ruler or feeler gauge whether the permissible displacement figures specified
in table 12 can be observed.
Axial displacements
Radial displacements
Angular displacements
Illustration 33: Displacements
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Assembly
4.10 Displacements - alignment of the couplings
Examples of the displacement combinations
specified in illustration 34:
Example 1:
Kr = 10%
Kw = 80%
Ka = 10%
Illustration 34:
Combinations of
displacement
Example 2:
Kr = 30%
Kw = 30%
Ka = 40%
Ktotal = Ka + Kr + Kw  100 %
20
25
35
38
42
50
60
70
80
85
90
105
115
135
136
156
166
186
206
246
286
336
138
158
168
188
208
248
288
338
Axial displacement
Ka [mm]
Type
Type
NN
NANA1, NANA2
0.60
1.2
0.80
1.6
1.00
2.0
1.20
2.4
1.40
2.8
1.60
3.2
1.00
2.0
1.10
2.2
1.30
2.6
1.30
2.6
1.00
2.0
1.20
2.4
1.40
2.8
1.75
3.5
1.85
3.7
2.10
4.2
2.25
4.5
2.40
4.8
2.60
5.2
3.00
6.0
3.35
6.7
3.75
7.5
1.30
2.6
1.40
2.8
1.50
3.0
1.60
3.2
1.75
3.5
2.00
4.0
2.25
4.5
2.50
5.0
Type
NN
-
Radial displacement
Kr [mm]
Type
NANA1
1.0
1.0
1.1
1.2
1.2
1.5
1.5
1.8
2.1
2.2
2.2
2.4
2.5
3.8
Type
NANA2
0.2
0.2
0.3
0.3
0.4
0.4
0.8
1.0
1.2
1.2
1.1
1.4
1.5
-
Kr = tanKw x (E3 - E1)
Size
Kr = tanKw x (E2 - E1)
Table 12: Displacement figures
Angular displacement
Kw [degree]
Type
NN, NANA1, NANA2
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
0.7
0.7
0.7
0.7
0.7
0.7
0.7
0.7
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
1) each laminae set
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26
Start-up
!
Before start-up make absolutely sure that the transport lock (see illustration 21) has been
removed.
Before start-up of the coupling, inspect the tightening of the setscrews in the flange hubs, the alignment and the
distance dimension DBSE 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 flange 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. We recommend a minimum distance of 15
mm from the outside diameter DH of the coupling.
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.
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.
Please observe protection
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Start-up
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 laminae set 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 result in improper use of the RADEX®-N 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 by improper use.
Directive 2014/34/EU and UK directive SI 2016 No. 1107 require special care by the
manufacturer and the user.
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.
• When 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 laminae set is inserted in the coupling.
• No original KTR components (purchased parts) are used.
• Maintenance intervals are not observed.
Please observe protection
note ISO 16016.
Drawn:
Verified:
2022-07-06 Pz/Wb
2022-08-08 Pz
Replacing:
Replaced by:
KTR-N dated 2021-05-04
RADEX®-N
Operating/Assembly instructions
6
KTR-N
Sheet:
Edition:
47110 EN
26 of 33
26
Breakdowns, causes and elimination
Breakdowns
Different operating
noise and/or
vibrations occuring
Causes
Hazard notes for
potentially explosive
atmospheres
Misalignment
none
Dowel screws working
loose, low micro friction
under the screw head
and on the steel
laminae set
Ignition risk due to
sparking
Screws for axial
fastening of flange
hubs working loose
none
Fracture of steel
laminae set due to high
impact
energy/overload
Fracture of steel
laminae set
Operating parameters
do not meet with the
performance of the
coupling
Ignition risk due to
sparking
Operating error of the
unit
Cracks in/fracture of
the steel laminae
sets/fastening screws
!
Vibrations of drive
Elimination
1) Set the unit out of operation
2) Eliminate the reason for the misalignment
(e. g. loose foundation bolts, fracture of the
engine mount, heat expansion of unit
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) Inspect coupling components and replace
coupling components that have been
damaged
3) Tighten the dowel screws until the specified
tightening torque is reached
4) Inspect alignment, adjust if necessary
1) Set the unit out of operation
2) Inspect alignment of coupling
3) Tighten the screws to fasten the flange hubs
and secure against working loose
4) For inspection of wear see chapter 10.2
1) Set the unit out of operation
2) Disassemble the coupling and remove
remainders of the steel laminae sets
3) Inspect coupling components and replace
coupling components that have been
damaged
4) Insert steel laminae sets, assemble coupling
components
5) Find out the reason for overload
1) Set the unit out of operation
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) Disassemble the coupling and remove
remainders of the steel laminae sets
3) Inspect coupling components and replace
coupling components that have been
damaged
4) Insert steel laminae sets, assemble coupling
components
5) Instruct and train the service staff
1) Set the unit out of operation
2) Disassemble the coupling and remove
remainders of the steel laminae sets
3) Inspect coupling components and replace
coupling components that have been
damaged
4) Insert steel laminae sets, assemble coupling
components
5) Inspect alignment, adjust if necessary
6) Find out the reason for vibrations
When operating with a faulty laminae set (see chapter 10.2), proper operation is not assured.
Please observe protection
note ISO 16016.
Drawn:
Verified:
2022-07-06 Pz/Wb
2022-08-08 Pz
Replacing:
Replaced by:
KTR-N dated 2021-05-04
RADEX®-N
Operating/Assembly instructions
7
KTR-N
Sheet:
Edition:
47110 EN
27 of 33
26
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.
All coupling components consist of metal. Any metal components have to be cleaned and disposed of by scrap
metal.
8
Maintenance and service
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.
RADEX®-N is a low-maintenance coupling. We recommend to perform a visual inspection on the coupling at
least once a year. Pay special attention to the condition of the laminae sets, alignment and screw connection of
the coupling.
• 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.
• If some individual laminas are broken, the laminae sets of the coupling have to be replaced. 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:
2022-07-06 Pz/Wb
2022-08-08 Pz
Replacing:
Replaced by:
KTR-N dated 2021-05-04
KTR-N
Sheet:
Edition:
RADEX®-N
Operating/Assembly instructions
10
47110 EN
28 of 33
26
Enclosure A
Advice and instructions regarding the use in
potentially explosive atmospheres
Types available:
NN, NANA 1 to 4, NENA 1 and 2, NENE 1, NNZ, NNW and MK each with flange hubs and each with laminae sets
type with 8 pins and closed circular laminae as well as assembly with KTR clamping nuts.
10.1 Intended use in
potentially explosive atmospheres
Conditions of operation in
potentially explosive atmospheres
The RADEX®-N 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
T2
T3
T4
T5
T6
Ambient or operating temperature Ta 1)
-40 °C to +230 °C
-40 °C to +175 °C
-40 °C to +110 °C
-40 °C to +75 °C
-40 °C to +60 °C
Max. surface temperature 2)
+250 °C
+195 °C
+130 °C
+95 °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 classes T6 to T3 (≤ 200 °C) a safety margin subject to standard of 5 K
and from temperature class T3 (≥ 200 °C) a safety margin subject to standard of 10 K is added.
1) The ambient or operating temperature Ta is limited to +250 °C due to the permissible permanent operating temperature (surface
temperature).
2) The maximum surface temperature of +230 °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 -40 °C to +130 °C.
Please observe protection
note ISO 16016.
Drawn:
Verified:
2022-07-06 Pz/Wb
2022-08-08 Pz
Replacing:
Replaced by:
KTR-N dated 2021-05-04
RADEX®-N
Operating/Assembly instructions
10
KTR-N
Sheet:
Edition:
47110 EN
29 of 33
26
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
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 laminae sets must
be performed after 3,000 operating hours for the first time, at the latest 6 months after
start-up of the coupling.
If you note insignificant or no wear on the lamina sets 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 laminae sets, 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 laminae sets must
be performed after 2,000 operating hours for the first time, at the latest 3 months after
start-up of the coupling.
If you note insignificant or no wear on the lamina sets 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 laminae sets, find out the cause according to the table
„Breakdowns“, if possible.
The maintenance intervals must be adjusted to the modified operating parameters
without fail.
Illustration 35: RADEX®-N type NANA 1
During the visual inspection the laminae sets must be inspected for cracks and screws working loose. Screws
working loose must be tightened at the screw tightening torque indicated (see chapter 4.9).
Regardless of the inspection intervals those laminae sets having cracks have to be replaced by a new laminae set
immediately.
Please observe protection
note ISO 16016.
Drawn:
Verified:
2022-07-06 Pz/Wb
2022-08-08 Pz
Replacing:
Replaced by:
KTR-N dated 2021-05-04
RADEX®-N
Operating/Assembly instructions
10
KTR-N
Sheet:
Edition:
47110 EN
30 of 33
26
Enclosure A
Advice and instructions regarding the use in
10.3
potentially explosive atmospheres
marking of coupling for potentially explosive atmospheres
The explosion protection marking of the RADEX®-N coupling is applied on the outer sheath or on the front side.
The laminae sets are not marked.
For the complete marking refer to the operating/assembly instructions and/or the delivery note/package.
Marking is as follows:
• Marking for unpainted res. coated or painted couplings with a layer thickness < 200 µm
I M2
II 2G
II 2D
Ex h
I
Mb
Ex h
IIC T6
… T2
Gb
Ex h
IIIC T80 °C … T250 °C Db
<Year>
-40 °C ≤ Ta ≤ +60 °C … +230 °C
KTR Systems GmbH, Carl-Zeiss-Str. 25, D-48432 Rheine
X
X
X
-40 °C ≤ Ta ≤ +130 °C
• Marking for painted couplings with a layer thickness of 0.2 mm to max. 2.0 mm
I M2
II 2G
II 2D
Ex h
I
Mb
Ex h
IIB T6
… T2
Gb
Ex h
IIIC T80 °C … T250 °C Db
<Year>
-40 °C ≤ Ta ≤ +60 °C … +230 °C
KTR Systems GmbH, Carl-Zeiss-Str. 25, D-48432 Rheine
X
X
X
-40 °C ≤ Ta ≤ +130 °C
Short marking:
(A short marking is only made if not possible differently for reason of space or functioning.)
RADEX®-N
<Year>
Deviating marking applied until 31st October 2019:
Short marking:
II 2GD c IIC T X/I M2 c X
II 2G c IIC T6, T5, T4, T3 resp. T2 -30 °C  Ta  +75 °C, +90 °C,
+125 °C, +190 °C resp. +280 °C
II 2D c T 110 °C -30 °C  Ta  +100 °C/I M2 c -30 °C  Ta  +140 °C
Complete marking:
Please observe protection
note ISO 16016.
Drawn:
Verified:
2022-07-06 Pz/Wb
2022-08-08 Pz
Replacing:
Replaced by:
KTR-N dated 2021-05-04
RADEX®-N
Operating/Assembly instructions
10
47110 EN
31 of 33
26
Enclosure A
Advice and instructions regarding the use in
10.3
KTR-N
Sheet:
Edition:
potentially explosive atmospheres
marking of coupling for potentially explosive atmospheres
Comments on marking
Equipment group I
Equipment group II
Equipment category 2G
Equipment category 2D
Equipment category M2
Mining
Non-mining
Equipment ensuring a high level of safety, suitable for zone 1
Equipment ensuring a high level of safety, suitable for zone 21
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
IIB
Gases and vapours of class IIB (including IIA)
IIC
Gases and vapours of class IIC (including IIA and IIB)
IIIC
Electrically conductive dusts of class IIIC (including IIIA and IIIB)
T6 … T2
Temperature class to be considered, depending on the ambient temperature
T80 °C … T250 °C
Maximum surface temperature to be considered, depending on the ambient
temperature
-40 °C ≤ Ta ≤ +60 °C … +230 °C, Permissible ambient temperature from -40 °C to +60 °C resp.
-40 °C ≤ Ta ≤ +230 °C or
-40 °C to +230 °C or -40 °C to +130 °C
-40 °C ≤ Ta ≤ +130 °C
Gb, Db, Mb
Equipment protection level, 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:
2022-07-06 Pz/Wb
2022-08-08 Pz
Replacing:
Replaced by:
KTR-N dated 2021-05-04
RADEX®-N
Operating/Assembly instructions
10
KTR-N
Sheet:
Edition:
47110 EN
32 of 33
26
Enclosure A
Advice and instructions regarding the use in
potentially explosive atmospheres
10.4 EU Declaration 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
RADEX®-N Steel Laminae 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 RADEX®-N is in accordance with the specifications of the 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 IBExU02ATEXB004_05 X):
IBExU
Institut für Sicherheitstechnik GmbH
Identification number: 0637
Fuchsmühlenweg 7
09599 Freiberg
Rheine,
Place
2022-07-06
Date
Please observe protection
note ISO 16016.
Drawn:
Verified:
i. V.
Reinhard Wibbeling
Engineering/R&D
2022-07-06 Pz/Wb
2022-08-08 Pz
i. V.
Reiner Banemann
Product Manager
Replacing:
Replaced by:
KTR-N dated 2021-05-04
RADEX®-N
Operating/Assembly instructions
10
KTR-N
Sheet:
Edition:
47110 EN
33 of 33
26
Enclosure A
Advice and instructions regarding the use in
potentially explosive atmospheres
10.5 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
RADEX®-N Steel Laminae 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 RADEX®-N 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
2022-07-06
Date
Please observe protection
note ISO 16016.
Drawn:
Verified:
i. V.
Reinhard Wibbeling
Engineering/R&D
2022-07-06 Pz/Wb
2022-08-08 Pz
i. V.
Reiner Banemann
Product Manager
Replacing:
Replaced by:
KTR-N dated 2021-05-04
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