KTR BoWex-ELASTIC Operating/Mounting Instructions
KTR BoWex-Elastic is a highly flexible plug-in shaft coupling designed for dampening torsional vibrations, reducing shocks, and isolating structure-borne noise. It compensates for significant shaft displacements, such as those caused by manufacturing tolerances or thermal expansion, making it ideal for various applications in challenging environments.
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BoWex-ELASTIC® Operating/Assembly instructions Type HEW, HEW Compact and HEW-ZS KTR-N Sheet: Edition: 40114 EN 1 of 27 10 BoWex-ELASTIC® highly flexible flange coupling types HEW, HEW Compact and their combinations according to directive 2014/34/EU and UK directive SI 2016 No. 1107 Type HEW1 Type HEW2 Type HEW Compact Type HEW-ZS Please observe protection note ISO 16016. Drawn: Verified: 2022-07-05 Pz/Wb 2022-08-03 Pz Replacing: Replaced by: KTR-N dated 2019-11-06 BoWex-ELASTIC® Operating/Assembly instructions Type HEW, HEW Compact and HEW-ZS KTR-N Sheet: Edition: 40114 EN 2 of 27 10 BoWex-ELASTIC® HEW is a highly flexible plug-in shaft coupling. It dampens torsional vibrations, reduces shocks and isolates structure-borne noise. The BoWex-ELASTIC® HEW coupling compensates for relatively large shaft displacements, for example caused by inaccuracies in production, thermal expansion etc. Table of contents 1 Technical data 3 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 8 10 11 11 13 15 Components of the couplings Advice for finish bore Assembly of the coupling (general) Assembly of type HEW and HEW Compact Assembly of type HEW-ZS Displacements - alignment of the couplings 5 Start-up 17 6 Breakdowns, causes and elimination 18 7 Disposal 20 8 Maintenance and service 20 9 Spares inventory, customer service addresses 20 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 Inspection of torsional backlash 10.4 Standard values of wear Please observe protection note ISO 16016. Drawn: Verified: 21 potentially explosive atmospheres 10.5 marking of couplings for potentially explosive atmospheres 10.6 EU Declaration of conformity 10.7 UK Declaration of conformity 2022-07-05 Pz/Wb 2022-08-03 Pz Replacing: Replaced by: 21 22 23 24 25 26 27 KTR-N dated 2019-11-06 BoWex-ELASTIC® Operating/Assembly instructions Type HEW, HEW Compact and HEW-ZS 1 KTR-N Sheet: Edition: 40114 EN 3 of 27 10 Technical data BoWex-ELASTIC® type HEW1 and HEW2 Illustration 1: BoWex-ELASTIC® type HEW1 Illustration 2: BoWex-ELASTIC® type HEW2 Table 1: Dimensions - type HEW1 and HEW2 Size 42 48 65 80 G 80 100 125 G 125 150 G 150 200 G 200 Max. finish bore [mm] D D1 48 50 48 55 65 75 80 80 85 95 100 110 125 125 125 125 160 160 160 160 180 200 180 200 L HEW1 132 137 187 215 235 278 355 355 380 380 480 480 HEW2 104 109 150 160 185 207 - L1 L2 L3 L7 50 50 70 90 90 110 140 140 150 150 175 175 55.0 55.0 75.0 80.0 90.0 111.5 170.0 170.0 150.0 150.0 220.0 220.0 45 45 55 70 80 80 99 95 100 108 149 149 15 17 28 17 22 14 14 14 18 18 26 26 Dimensions 1) [mm] Size 42 48 65 80 G 80 100 125 G 125 150 G 150 200 G 200 Dimensions 1) [mm] D4 162.00 180.00 224.00 295.27 333.40 438.15 438.15 489.00 542.90 542.90 641.35 250.00 D6 146 164 205 266 302 350 416 440 470 504 568 600 N 42 45 63 70 78 113 158 158 145 145 214 214 Weight with max. bore [kg] ZxM 6 8 8 8 8 8 16 8 6 6 12 12 M6 M6 M8 M10 M10 M12 M12 M12 M16 M16 M16 M16 4.3 5.5 13.2 19.7 25.9 48.5 67.2 76.6 110.0 113.4 195.0 200.0 E HEW1 32 32 42 45 55 57 45 45 70 70 85 85 HEW2 4 4 5 5 5 26 - Mass moment of inertia with maximum bore of coupling [kgm2] JA JL 0.0121 0.0015 0.0204 0.0019 0.0752 0.0071 0.1449 0.0285 0.2748 0.0422 0.8356 0.1050 0.9498 0.2617 1.4492 0.3034 2.7206 0.5303 2.7809 0.5861 6.6418 1.1406 6.6099 1.3419 DA DN DN1 180 200 245 318 358 478 478 530 585 585 683 683 68 68 96 124 124 152 192 192 225 225 250 200 85 92 125 130 145 158 175 175 225 225 280 280 Perm. damping power 2) PKW [W] 60 °C 26.0 36.0 60.0 120.0 180.0 210.0 221.0 240.0 262.0 278.0 308.0 324.0 80 °C 15.6 21.6 36.0 72.0 108.0 126.0 133.0 144.0 157.0 167.0 185.0 194.0 90 °C 10.4 14.4 24.0 48.0 72.0 84.0 88.0 96.0 105.0 111.0 123.0 130.0 1) For dimensions G and T as well as G1 and T1 see table 5 2) With applications in potentially explosive atmospheres in category 2 only 50 % of the max. permissible damping power is permissible. Please observe protection note ISO 16016. Drawn: Verified: 2022-07-05 Pz/Wb 2022-08-03 Pz Replacing: Replaced by: KTR-N dated 2019-11-06 BoWex-ELASTIC® Operating/Assembly instructions Type HEW, HEW Compact and HEW-ZS 1 KTR-N Sheet: Edition: 40114 EN 4 of 27 10 Technical data BoWex-ELASTIC® type HEW Compact Illustration 3: BoWex-ELASTIC® type HEW1 Compact Illustration 4: BoWex-ELASTIC® type HEW2 Compact Table 2: Dimensions - type HEW Compact Size 42-130 65-180 80-225 100-305 125-365 Max. finish bore [mm] D D1 42 42 65 65 80 75 100 100 125 125 HEW1 118 145 210 258 328 L1 HEW2 98 122 158 187 240 42 55 90 110 140 D4 78 110 120 175 205 B1 45 55 77 90 150 NH 37 47 51 73 90 ZxM 6 8 10 16 12 Dimensions 1) [mm] E L2 HEW1 HEW2 42 34 14 60 30 7 70 50 18 90 58 17 120 68 20 Weight with pilot bored coupling [kg] Dimensions 1) [mm] Size 42-130 65-180 80-225 100-305 125-365 L M6 M10 M12 M12 M16 3.4 9.0 18.9 40.2 75.0 Mass moment of inertia with pilot bored coupling [kgm2] JA JL 0.003 0.001 0.014 0.006 0.035 0.029 0.152 0.087 0.360 0.260 DA DN DN1 131 180 225 305 365 65 96 124 152 192 90 130 145 200 235 Perm. damping power 2) PKW [W] 60 °C 30 55 90 150 220 80 °C 18 33 54 90 132 90 °C 12 22 36 60 88 1) For dimensions G and T as well as G1 and T1 see table 5 2) With applications in potentially explosive atmospheres in category 2 only 50 % of the max. permissible damping power is permissible. Please observe protection note ISO 16016. Drawn: Verified: 2022-07-05 Pz/Wb 2022-08-03 Pz Replacing: Replaced by: KTR-N dated 2019-11-06 BoWex-ELASTIC® Operating/Assembly instructions Type HEW, HEW Compact and HEW-ZS 1 KTR-N Sheet: Edition: 40114 EN 5 of 27 10 Technical data BoWex-ELASTIC® type HEW-ZS Illustration 5: BoWex-ELASTIC® type HEW-ZS (size 48 to G 80) Illustration 6: BoWex-ELASTIC® type HEW-ZS (size 100 to G 125) Table 3: Dimensions - type HEW-ZS Size Dimensions 1) [mm] 48 65 80 G 80 100 125 G 125 8 8 8 8 8 16 8 ZxM M6 M8 M10 M10 M12 M12 M12 Dimensions 1) [mm] L L = L1 + L2 + DBSE 48 65 80 G 80 100 125 G 125 Max. finish bore [mm] D D1 28 55 45 75 65 80 65 95 90 110 120 125 120 125 Size L1 50 55 90 90 80 80 80 L2 55.0 75.0 80.0 90.0 111.5 170.0 170.0 L3 45 55 70 80 80 99 95 L7 17 28 17 22 16 18 15 Spacer HEW-ZS DBSE [mm] 100 ⚫ 120 ⚫ ⚫ 140 ⚫ ⚫ 180 ⚫ ⚫ ⚫ ⚫ ⚫ L10 45 56 75 75 76 76 76 Weight with max. bore [kg] 250 ⚫ ⚫ ⚫ ⚫ 6.9 16.0 25.5 34.2 54.0 84.2 93.5 DA 200 245 318 358 478 478 530 DH 78 110 145 145 180 225 225 DN 45 72 100 100 135 180 180 Mass moment of inertia with maximum bore of coupling [kgm2] JA JL 0.0203 0.0050 0.0747 0.0160 0.1447 0.0699 0.2752 0.1412 0.8459 0.0992 1.1814 0.3017 1.6853 0.3690 DN1 92 125 130 145 158 175 175 D4 180.00 224.00 295.27 333.40 438.15 438.15 489.00 D6 164 205 266 302 350 416 440 N 45 63 70 78 110 171 157 Perm. damping power 2) PKW [W] 60 °C 36.0 60.0 120.0 180.0 210.0 221.0 240.0 80 °C 21.6 36.0 72.0 108.0 126.0 133.0 144.0 90 °C 14.4 24.0 48.0 72.0 84.0 88.0 96.0 1) For dimensions G1 and T1 as well as G2 and T2 see table 5 2) With applications in potentially explosive atmospheres in category 2 only 50 % of the max. permissible damping power is permissible. BoWex-ELASTIC® 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 2022-08-03 Pz Replacing: Replaced by: KTR-N dated 2019-11-06 BoWex-ELASTIC® Operating/Assembly instructions Type HEW, HEW Compact and HEW-ZS 2 KTR-N Sheet: Edition: 40114 EN 6 of 27 10 Advice 2.1 General advice Read through these operating/assembly instructions carefully before you start up the coupling. Pay special attention to the safety instructions! The BoWex-ELASTIC® 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 2022-08-03 Pz Replacing: Replaced by: KTR-N dated 2019-11-06 BoWex-ELASTIC® Operating/Assembly instructions Type HEW, HEW Compact and HEW-ZS 2 KTR-N Sheet: Edition: 40114 EN 7 of 27 10 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 BoWex-ELASTIC® type HEW, HEW Compact and HEW-ZS described in here corresponds to the technical status at the time of printing of these operating/assembly instructions. 2.5 Coupling selection ! For a long-lasting 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 "BoWex-ELASTIC®"). 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 elastomer part 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. With applications in potentially explosive atmospheres in conjunction with gases only 50 % of the permissible damping power of the coupling is permissible with temperature class T6 to T4 (see chapter 1). 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 2022-08-03 Pz Replacing: Replaced by: KTR-N dated 2019-11-06 BoWex-ELASTIC® Operating/Assembly instructions Type HEW, HEW Compact and HEW-ZS 3 KTR-N Sheet: Edition: 40114 EN 8 of 27 10 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. With favourable storage conditions the properties of the elastomer part remain unchanged for up to 5 years. ! 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 couplings Components of BoWex-ELASTIC® type HEW1 and HEW2 Component 1 2 4 5 7 Quantity 1 1 1 see table 1 1) 2 Description Elastomer part Hub Flange hub Cap screw DIN EN ISO 4762 1) Setscrew DIN EN ISO 4029 1) With size 150 nuts as per DIN EN ISO 4014 are required additionally. Illustration 7: BoWex-ELASTIC® type HEW1 Please observe protection note ISO 16016. Drawn: Verified: Illustration 8: BoWex-ELASTIC® type HEW2 2022-07-05 Pz/Wb 2022-08-03 Pz Replacing: Replaced by: KTR-N dated 2019-11-06 BoWex-ELASTIC® Operating/Assembly instructions Type HEW, HEW Compact and HEW-ZS 4 KTR-N Sheet: Edition: 40114 EN 9 of 27 10 Assembly 4.1 Components of the couplings Components of BoWex-ELASTIC® type HEW Compact Component 1 2 4 5 7 Quantity 1 1 1 see table 2 2 Description Elastomer part Hub Coupling flange Cap screw DIN EN ISO 4762 Setscrew DIN EN ISO 4029 Illustration 9: BoWex-ELASTIC® type HEW1 Compact Illustration 10: BoWex-ELASTIC® type HEW2 Compact Components of BoWex-ELASTIC® type HEW-ZS Component 1 2 3 4 4.1 4.2 4.3 5 6 7 Quantity 1 1 1 1 1 1 see table 4 see table 3 see table 4 2 Description Elastomer part Intermediate shaft hub Hub spec. Flange hub Coupling flange Additional flange Cap screw DIN EN ISO 4762 Cap screw DIN EN ISO 4762 Cap screw DIN EN ISO 4762 Setscrew DIN EN ISO 4029 Illustration 11: BoWex-ELASTIC® type HEW-ZS (size 48 to G 80) Illustration 12: BoWex-ELASTIC® type HEW-ZS (size 100 to G 125) Table 4: Cap screws DIN EN ISO 4762 Size Number Z (component 4.3) Number Z (component 6) 48 8 Please observe protection note ISO 16016. Drawn: Verified: 65 12 80 12 2022-07-05 Pz/Wb 2022-08-03 Pz G 80 12 100 15 12 Replacing: Replaced by: 125 12 12 G 125 12 12 KTR-N dated 2019-11-06 BoWex-ELASTIC® Operating/Assembly instructions Type HEW, HEW Compact and HEW-ZS 4 KTR-N Sheet: Edition: 40114 EN 10 of 27 10 Assembly 4.2 Advice for finish bore 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. STOP • 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 hub 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 hub axially. Illustration 13: 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 5: Setscrew DIN EN ISO 4029 Size 42 48 65 Dimension G Dimension G1 Dimension G2 Dimension T Dimension T1 Dimension T2 Tightening torque TA [Nm] M8 M8 M8 10 20 10 10 M8 M8 M8 10 20 10 10 M10 M10 M10 15 / 20 1) 20 20 17 80 G 80 M10 M10 M10 20 25 20 17 100 M12 M12 M12 30 30 20 40 125 G 125 M16 M16 M16 40 40 20 80 150 G150 M16 M16 M16 40 40 50 80 200 G 200 M16 M16 M16 40 60 60 80 1) Length of hub 55 mm T = 15 mm, length of hub 70 mm T = 20 mm Table 6: 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 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 2022-08-03 Pz Replacing: Replaced by: KTR-N dated 2019-11-06 BoWex-ELASTIC® Operating/Assembly instructions Type HEW, HEW Compact and HEW-ZS 4 KTR-N Sheet: Edition: 40114 EN 11 of 27 10 Assembly 4.3 Assembly of the coupling (general) ! 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. We recommend to inspect bores, shaft, keyway and feather key for dimensional accuracy before assembly. Heating the hubs lightly (approx. 80 °C) allows for an easier mounting on the shaft. 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 dimension E resp. DBSE (see chapter 1) is observed to allow for axial clearance of the coupling sleeve while 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). 4.4 Assembly of type HEW and HEW Compact • Mount the hub (component 2) and the flange hub resp. coupling flange (component 4) on the shafts of driving and driven side (see illustration 14). • Secure the hub and the flange hub resp. coupling flange by tightening the setscrew (component 7) DIN EN ISO 4029 with a cup point (tightening torques see table 5). Illustration 14: Assembly of the hub and the flange hub resp. coupling flange (example: type HEW1) Please observe protection note ISO 16016. Drawn: Verified: 2022-07-05 Pz/Wb 2022-08-03 Pz Replacing: Replaced by: KTR-N dated 2019-11-06 BoWex-ELASTIC® Operating/Assembly instructions Type HEW, HEW Compact and HEW-ZS 4 KTR-N Sheet: Edition: 40114 EN 12 of 27 10 Assembly 4.4 Assembly of type HEW and HEW Compact • Position the elastomer part (component 1) in front of the flange hub resp. coupling flange (see illustration 15). • Hand-tighten the components first. • Tighten the screws (component 5) at the appropriate tightening torque TA by means of a suitable torque key (see table 7 or 8). We recommend to secure all screw connections against working loose additionally, e. g. applying Loctite screw adhesive (average strength), while the elastomer parts must not come into contact with any type of adhesive. Illustration 15: Assembly of the elastomer part to the flange hub resp. coupling flange (example: type HEW1) Table 7: Cap screws DIN EN ISO 4762 - type HEW Size Tightening torque TA [Nm] 42 48 65 80 G 80 100 125 G 125 150 G 150 200 G 200 14 14 35 69 69 120 120 120 295 295 410 410 Table 8: Cap screws DIN EN ISO 4762 - type HEW Compact Size Tightening torque TA [Nm] 42 65 80 100 125 14 69 120 120 250 • Shift the machine components in axial direction until the distance dimension E or L is achieved (see illustration 16 as well as table 1 and 2). • If the position of the machine components is already fixed, the mounting dimension can be set by shifting the hub axially on the shaft. ! ! With the assembly make sure that the spline of the hub is fully covered by the internal spline of the elastomer part (observe mounting dimension E or L). Disregarding this advice may cause damage to the coupling. 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. Please observe protection note ISO 16016. Drawn: Verified: 2022-07-05 Pz/Wb 2022-08-03 Pz Illustration 16: Assembly of coupling (example: type HEW1) Replacing: Replaced by: KTR-N dated 2019-11-06 BoWex-ELASTIC® Operating/Assembly instructions Type HEW, HEW Compact and HEW-ZS 4 KTR-N Sheet: Edition: 40114 EN 13 of 27 10 Assembly 4.5 Assembly of type HEW-ZS • Only valid with type HEW-ZS (size 100 to G 125): Position the additional flange (component 4.2) in front of the coupling flange (component 4.1) (see illustration 17). • Hand-tighten the components first. • Tighten the screws (component 4.3) at the appropriate tightening torque TA by means of a suitable torque key (see table 9). Illustration 17: Assembly of the additional flange with the coupling flange (type HEW-ZS (size 100 to G 125)) Table 9: Cap screws DIN EN ISO 4762 Size Tightening torque TA [Nm] 100 125 G 125 355 355 355 • Mount the intermediate shaft hub (component 2) and the flange hub (component 4) resp. coupling flange with additional flange (component 4.1 and 4.2) on the shaft of driving and driven side (see illustration 18). • Secure the intermediate shaft hub and the flange hub resp. the coupling flange by tightening the setscrew (component 7) DIN EN ISO 4029 with a cup point (tightening torques see table 5). Illustration 18: Assembly of the hub and flange hub resp. the coupling flange with additional flange (example: type HEW-ZS (size 48 to G 80)) • Position the hub spec. (component 3) in front of the intermediate shaft hub (component 2) (see illustration 19). • Hand-tighten the components first. • Tighten the screws (component 6) at the appropriate tightening torque TA by means of a suitable torque key (see table 10). Illustration 19: Assembly of hub Table 10: Cap screws DIN EN ISO 4762 Size Tightening torque TA [Nm] Please observe protection note ISO 16016. 48 65 80 G 80 100 125 G 125 41 69 120 120 190 295 295 Drawn: Verified: 2022-07-05 Pz/Wb 2022-08-03 Pz Replacing: Replaced by: KTR-N dated 2019-11-06 BoWex-ELASTIC® Operating/Assembly instructions Type HEW, HEW Compact and HEW-ZS 4 KTR-N Sheet: Edition: 40114 EN 14 of 27 10 Assembly 4.5 Assembly of type HEW-ZS • Position the elastomer part (component 1) in front of the flange hub resp. coupling flange (see illustration 20). • Hand-tighten the components first. • Tighten the screws (component 5) at the appropriate tightening torque TA by means of a suitable torque key (see table 11). We recommend to secure all screw connections against working loose additionally, e. g. applying Loctite screw adhesive (average strength), while the elastomer parts must not come into contact with any type of adhesive. Illustration 20: Assembly of the elastomer part to the flywheel Table 11: Cap screws DIN EN ISO 4762 - type HEW-ZS Size Tightening torque TA [Nm] 48 65 80 G 80 100 125 G 125 14 35 69 69 120 120 120 • Shift the machine components in axial direction until the mounting dimension DBSE resp. L is achieved (see illustration 21 as well as table 3). • If the position of the machine components is already fixed, the mounting dimension can be set by shifting the hub axially on the shaft. ! ! With the assembly make sure that the spline of the hub is fully covered by the internal spline of the elastomer part (observe mounting dimension DBSE or L). Disregarding this advice may cause damage to the coupling. 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. Please observe protection note ISO 16016. Drawn: Verified: 2022-07-05 Pz/Wb 2022-08-03 Pz Illustration 21: Assembly of coupling Replacing: Replaced by: KTR-N dated 2019-11-06 BoWex-ELASTIC® Operating/Assembly instructions Type HEW, HEW Compact and HEW-ZS 4 KTR-N Sheet: Edition: 40114 EN 15 of 27 10 Assembly 4.6 Displacements - alignment of the couplings The BoWex-ELASTIC® HEW couplings accept a position deviation of the machine parts to be connected up to the data specified in table 12 and 13. With alignment, the radial and angular displacement should be kept as small as possible, because the service life is increased in this way provided that the operating conditions are maintained besides that. The BoWex-ELASTIC® HEW coupling has to be aligned from the coupling hub on the shaft side to one of the machined surfaces of the flange hub. 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 tables 12 and 13). If the figures are exceeded, the coupling will be damaged. The more accurate the alignment of the coupling, the longer is its service life. ! Please note: • The displacement figures specified in table 12 and 13 are maximum figures which must not arise in parallel. If radial and angular displacements arise simultaneously, the permissible displacement figures may only be used proportionally (see illustration 23). • The displacement figures specified are general standard figures that apply up to an ambient temperature of 80 °C, ensuring a sufficient service life of the BoWex-ELASTIC® coupling. Displacement figures between the speeds specified have to be interpolated accordingly. If necessary, ask about the displacement for the corresponding coupling type. • Inspect with a dial gauge, ruler or feeler whether the permissible displacement figures of tables 12 and 13 can be observed. Axial displacement Radial displacement Angular displacement Illustration 22: Displacements Please observe protection note ISO 16016. Drawn: Verified: 2022-07-05 Pz/Wb 2022-08-03 Pz Replacing: Replaced by: KTR-N dated 2019-11-06 BoWex-ELASTIC® Operating/Assembly instructions Type HEW, HEW Compact and HEW-ZS 4 KTR-N Sheet: Edition: 40114 EN 16 of 27 10 Assembly 4.6 Displacements - alignment of the couplings Examples of the displacement combinations specified in illustration 23: Illustration 23: Combinations of displacement Example 1: Kr = 30 % Kw = 70 % Example 2: Kr = 60 % Kw = 40 % Ktotal = Kr + Kw 100 % Table 12: Displacement figures - type HEW and HEW-ZS Displacement figures Perm. axial displacement Ka [mm] Perm. radial displacement with n = 1500 rpm Kr [mm] Elastomer hardness [Shore A] 48 HE 65 HE G 65 HE Size 80 HE 100 HE G 80 HE 125 HE 150 HE 200 HE G 125 HE G 150 HE G 200 HE 40 / 50 / 65 2) 3) ±2 ±2 ±2 ±2 ±3 ±3 ±5 ±5 40 3) 50 3) 65 2) 3) 40 3) 50 3) 65 2) 3) 40 3) 50 3) 65 2) 3) 40 3) 50 3) 1.1 1.0 0.5 0.8 0.7 0.4 3.6 3.3 1.5 1.0 0.75 1.2 1.1 0.5 1.1 1.0 0.4 3.8 3.5 1.7 1.0 0.75 1.6 1.5 0.7 1.4 1.3 0.5 5.1 4.7 2.2 1.0 0.75 1.8 1.7 0.8 1.6 1.5 0.6 5.7 5.3 2.4 1.0 0.75 2.2 2.0 1.0 2.0 1.8 0.8 6.5 6.0 3.0 1.0 0.75 2.5 2.3 1.1 2.2 2.0 0.8 7.5 6.9 3.3 1.0 0.75 65 2) 3) 0.5 0.5 0.5 0.5 0.5 0.5 2.8 2.5 1.3 2.5 2.2 1.0 8.0 7.5 4.0 1.0 0.75 0.5 3.0 2.7 1.5 2.8 2.5 1.2 8.5 8.0 4.5 1.0 0.75 0.5 3) 40 50 3) 0.5 0.4 0.5 0.4 0.5 0.4 0.5 0.4 0.5 0.4 0.5 0.4 65 2) 3) 0.25 0.25 0.25 0.25 0.25 0.25 0.5 0.4 0.25 0.5 0.4 0.25 40 / 50 / 65 2) 3) 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 Perm. radial displacement with n = 3000 rpm Kr [mm] Max. radial displacement Kr [mm] 1) Perm. angular displacement with n = 1500 rpm Kw [degree] Perm. angular displacement with n = 3000 rpm Kw [degree] Max. angular displacement Kw [degree] 1) 42 HE 1) for short-term start-up operation 2) With size 125 = 70 ShA 3) Applies for compound T as well Please observe protection note ISO 16016. Drawn: Verified: 2022-07-05 Pz/Wb 2022-08-03 Pz Replacing: Replaced by: KTR-N dated 2019-11-06 BoWex-ELASTIC® Operating/Assembly instructions Type HEW, HEW Compact and HEW-ZS 4 KTR-N Sheet: Edition: 40114 EN 17 of 27 10 Assembly 4.6 Displacements - alignment of the couplings Table 13: Displacement figures - type HEW Compact Displacement figures Perm. axial displacement Ka [mm] Perm. radial displacement with n = 1500 rpm Kr [mm] Elastomer hardness [Shore A] 65-180 Size 80-225 100-305 125-365 T50/T65/T70 ±2 ±2 ±2 ±2 ±2 T50 T65 T70 T50 T65 T70 T50 T65 ±1.1 ±1.0 ±0.5 ±0.55 ±0.5 ±0.25 ±1.0 ±0.75 ±1.6 ±1.5 ±0.7 ±0.8 ±0.75 ±0.35 ±1.0 ±0.75 ±1.8 ±1.7 ±2.2 ±0.9 ±0.85 ±1.1 ±1.0 ±0.75 ±2.2 ±2 ±1.0 ±1.1 ±1 ±0.5 ±1.0 ±0.75 ±2.5 ±2.3 ±1.1 ±1.25 ±1.15 ±0.55 ±1.0 ±0.75 T70 ±0.5 ±0.5 ±1.0 ±0.5 ±0.5 T50 T65 ±0.5 ±0.4 ±0.5 ±0.4 ±0.5 ±0.4 ±0.5 ±0.25 ±0.5 ±0.4 T70 ±0.25 ±0.25 ±0.5 ±0.25 ±0.25 Perm. radial displacement with n = 3000 rpm Kr [mm] Perm. angular displacement with n = 1500 rpm Kw [degree] Perm. angular displacement with n = 3000 rpm Kw [degree] 5 42-130 Start-up Before start-up of the coupling, inspect the tightening of the setscrews in the hubs, the alignment and the distance dimension L 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. We recommend a minimum distance of 15 mm from the outside diameter DA 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. 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). Please observe protection note ISO 16016. Drawn: Verified: 2022-07-05 Pz/Wb 2022-08-03 Pz Replacing: Replaced by: KTR-N dated 2019-11-06 BoWex-ELASTIC® Operating/Assembly instructions Type HEW, HEW Compact and HEW-ZS 5 KTR-N Sheet: Edition: 40114 EN 18 of 27 10 Start-up 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. Coatings up to a maximum of 2.0 mm are permissible for gases and vapours of category IIA and IIB in potentially explosive atmospheres. 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 elastomer part and nylon components 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 an improper use of the BoWex-ELASTIC® 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 improper use: • 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. • No original KTR components (purchased parts) are used. • Old/already worn out elastomer parts or those stored for too long are used. • Maintenance intervals are not observed. Please observe protection note ISO 16016. Drawn: Verified: 2022-07-05 Pz/Wb 2022-08-03 Pz Replacing: Replaced by: KTR-N dated 2019-11-06 BoWex-ELASTIC® Operating/Assembly instructions Type HEW, HEW Compact and HEW-ZS 6 KTR-N Sheet: Edition: 40114 EN 19 of 27 10 Breakdowns, causes and elimination Breakdowns Different operating noise and/or vibrations occurring Causes Hazard notes for potentially explosive atmospheres Micro friction by faulty alignment on the spline of the elastomer part Danger of ignition due to hot surfaces Screws for axial fastening of hubs working loose Fracture of elastomer part/spline caused by high dynamic energy/overload Fracture of elastomer part/spline Operating parameters do not meet with the performance of the coupling none Operating error of the unit Vibrations of drive Danger of ignition due to hot surfaces Excessive wear on the spline of the elastomer part, fracture of elastomer Ambient/contact temperatures which are too high for the elastomer part, max. permissible -30 °C/+80 °C E. g. contact with aggressive liquids/oils, influence by ozone, too high ambient temperature etc. causing a physical change of the elastomer part ! none 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, thermal 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 alignment of coupling 3) Tighten the screws to fasten the 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 elastomer part 3) Inspect coupling components and replace coupling components that are damaged 4) Insert elastomer part, 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 elastomer part 3) Inspect coupling components and replace coupling components that are damaged 4) Insert elastomer part, 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 elastomer part 3) Inspect coupling components and replace coupling components that are damaged 4) Insert elastomer part, assemble coupling components 5) Inspect alignment, adjust if necessary 6) Find out the reason for vibrations 1) Set the unit out of operation 2) Disassemble the coupling and remove remainders of the elastomer part 3) Inspect coupling components and replace coupling components that are damaged 4) Insert elastomer part, assemble coupling components 5) Inspect alignment, adjust if necessary 6) Inspect and adjust ambient/contact temperature 1) Set the unit out of operation 2) Disassemble the coupling and remove remainders of the elastomer part 3) Inspect coupling components and replace coupling components that are damaged 4) Insert elastomer part, assemble coupling components 5) Inspect alignment, adjust if necessary 6) Make sure that other physical modifications of the elastomer part are excluded When operating with a worn elastomer part (see chapter 10.3 and 10.4) proper operation is not ensured. Please observe protection note ISO 16016. Drawn: Verified: 2022-07-05 Pz/Wb 2022-08-03 Pz Replacing: Replaced by: KTR-N dated 2019-11-06 BoWex-ELASTIC® Operating/Assembly instructions Type HEW, HEW Compact and HEW-ZS 7 KTR-N Sheet: Edition: 40114 EN 20 of 27 10 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. 8 Maintenance and service BoWex-ELASTIC® 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 elastomer parts 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. • 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: 2022-07-05 Pz/Wb 2022-08-03 Pz Replacing: Replaced by: KTR-N dated 2019-11-06 BoWex-ELASTIC® Operating/Assembly instructions Type HEW, HEW Compact and HEW-ZS 10 KTR-N Sheet: Edition: 40114 EN 21 of 27 10 Enclosure A Advice and instructions regarding the use in potentially explosive atmospheres Types available: HEW and HEW Compact 10.1 Intended use in potentially explosive atmospheres Conditions of operation in potentially explosive atmospheres The BoWex-ELASTIC® 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. 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 IIB (gases, fogs, vapours) (explosion group IIA is included in IIB) and explosion group IIIC (dusts) (explosion groups IIIA and IIIB are included in IIIC) Temperature class: Temperature class T4 T5 T6 Ambient or operating temperature Ta 1) -30 °C to +80 °C -30 °C to +60 °C -30 °C to +45 °C Max. surface temperature 2) +115 °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 35 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 +80 °C due to the permissible permanent operating temperature of the BoWexELASTIC® elastomer parts used. 2) The maximum surface temperature of +115 °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. Please observe protection note ISO 16016. Drawn: Verified: 2022-07-05 Pz/Wb 2022-08-03 Pz Replacing: Replaced by: KTR-N dated 2019-11-06 BoWex-ELASTIC® Operating/Assembly instructions Type HEW, HEW Compact and HEW-ZS 10 KTR-N Sheet: Edition: 40114 EN 22 of 27 10 Enclosure A Advice and instructions regarding the use in 10.2 Inspection intervals for couplings in potentially explosive atmospheres potentially explosive atmospheres Equipment category Inspection intervals 2G 2D Gases and vapours of explosion group IIA and IIB The torsional backlash of the coupling (see chapter 10.3 and 10.4) according to directive 2014/34/EU has to be inspected only if a failure of the coupling and consequently a downtime of the drive causes explosion hazard. We recommend a preventive inspection of torsional backlash and a visual inspection of the elastomer part. This should be performed after 1,000 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 elastomer part upon this initial inspection, further inspections can each be performed after 2,000 operating hours or at the latest after 18 months, provided that the operating parameters remain the same. If you note significant wear with the initial inspection so that it would be advisable to replace the elastomer part, find out the cause according to the table „Breakdowns“, if possible. The maintenance intervals must be adjusted to the modified operating parameters without fail. BoWex-ELASTIC® Here the backlash between the hub and the nylon spline must be inspected via torsional backlash, each separately from the driving and the driven side. The friction/wear may only be Xmax. (see table 14) of the original spline thickness before the elastomer part must be replaced. When reaching the torsional backlash Smax., the elastomer part must be replaced immediately, irrespective of the inspection intervals. Visual inspection of the elastomer part (cracks, holes or anything similar). Illustration 24: BoWex-ELASTIC® (example: type HEW1) Please observe protection note ISO 16016. Drawn: Verified: 2022-07-05 Pz/Wb 2022-08-03 Pz Replacing: Replaced by: KTR-N dated 2019-11-06 BoWex-ELASTIC® Operating/Assembly instructions Type HEW, HEW Compact and HEW-ZS 10 KTR-N Sheet: Edition: 40114 EN 23 of 27 10 Enclosure A Advice and instructions regarding the use in potentially explosive atmospheres 10.3 Inspection of torsional backlash ! To inspect the torsional backlash the power pack switched off needs to be secured against accidental switch-on. • Rotate the hub opposite the direction of drive. ! Here the elastomer part must not be axially displaced from its position of wear. • Mark elastomer part and hub (see Illustration 25). • Rotate the hub in the driving direction and measure the torsional backlash Smax. • When reaching the torsional backlash Smax the elastomer part must be replaced. Illustration 25: Marking of the elastomer part and the hub Please observe protection note ISO 16016. Drawn: Verified: 2022-07-05 Pz/Wb 2022-08-03 Pz Replacing: Replaced by: KTR-N dated 2019-11-06 BoWex-ELASTIC® Operating/Assembly instructions Type HEW, HEW Compact and HEW-ZS 10 KTR-N Sheet: Edition: 40114 EN 24 of 27 10 Enclosure A Advice and instructions regarding the use in potentially explosive atmospheres 10.4 Standard values of wear If the torsional backlash is Smax. [mm] / friction Xmax. [mm], the elastomer part must be replaced. 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 tables 12 and 13). If the figures are exceeded, the coupling will be damaged. ! Illustration 26: Elastomer part in new condition Illustration 27: Wear of elastomer part Table 14: Size 42 48 65 80 G 80 100 Limits of wear each hub Torsional backlash Friction Xmax. [mm] Smax. [mm] 1.0 1.7 1.0 1.8 1.4 2.5 1.6 2.7 1.6 2.7 1.8 3.1 Please observe protection note ISO 16016. Drawn: Verified: Size 125 G 125 150 G 150 200 G 200 2022-07-05 Pz/Wb 2022-08-03 Pz Limits of wear each hub Torsional backlash Friction Xmax. [mm] Smax. [mm] 2.0 3.5 2.0 3.5 2.5 4.0 2.5 4.0 2.5 4.0 2.5 4.0 Replacing: Replaced by: KTR-N dated 2019-11-06 BoWex-ELASTIC® Operating/Assembly instructions Type HEW, HEW Compact and HEW-ZS 10 40114 EN 25 of 27 10 Enclosure A Advice and instructions regarding the use in 10.5 KTR-N Sheet: Edition: potentially explosive atmospheres marking of couplings for potentially explosive atmospheres The explosion protection marking of the BoWex-ELASTIC® coupling is applied on the polyamide flange of the elastomer part. For the complete marking refer to the operating/assembly instructions and/or the delivery note/package. Marking is as follows: Ex h IIB T6 … T4 Gb Ex h IIIC T80 °C … T115 °C Db <Year> -30 °C ≤ Ta ≤ +45 °C … +80 °C KTR Systems GmbH, Carl-Zeiss-Str. 25, D-48432 Rheine II 2G II 2D X X Short marking: (A short marking is only made if not possible differently for reason of space or functioning.) BoWex-ELASTIC® <Year> Deviating marking applied until 31st October 2019: Short marking: II 2GD c IIB T X Complete marking: II 2G c IIB T6, T5 resp. T4 -30 °C Ta +50°C, +65 °C resp. +80 °C II 2D c T 115 °C -30 °C Ta +80 °C Comments on marking Equipment group II Equipment category 2G Equipment category 2D D G Ex h IIB IIIC T6 … T4 T80 °C … T115 °C Non-mining Equipment ensuring a high level of safety, suitable for zone 1 Equipment ensuring a high level of safety, suitable for zone 21 Dust Gases and vapours Nonelectrical explosion protection Gases and vapours of class IIB (including IIA) Electrically conductive dusts of class IIIC (including IIIA and IIIB) Temperature class to be considered, depending on the ambient temperature Maximum surface temperature to be considered, depending on the ambient temperature -30 °C ≤ Ta ≤ +45 °C … +80 °C or Permissible ambient temperature from -30 °C to +45 °C resp. -30 °C ≤ Ta ≤ +80 °C -30 °C to +80 °C Gb, Db Equipment protection level, high 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 2022-08-03 Pz Replacing: Replaced by: KTR-N dated 2019-11-06 BoWex-ELASTIC® Operating/Assembly instructions Type HEW, HEW Compact and HEW-ZS 10 KTR-N Sheet: Edition: 40114 EN 26 of 27 10 Enclosure A Advice and instructions regarding the use in potentially explosive atmospheres 10.6 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 BoWex-ELASTIC® highly flexible flange 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 BoWex-ELASTIC® complies 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 IBExU13ATEXB007 X): IBExU Institut für Sicherheitstechnik GmbH Identification number: 0637 Fuchsmühlenweg 7 09599 Freiberg Rheine, 2022-07-05 Date Please observe protection note ISO 16016. Drawn: Verified: i. V. Reinhard Wibbeling Engineering/R&D 2022-07-05 Pz/Wb 2022-08-03 Pz i. A. Andreas Hücker Product Manager Replacing: Replaced by: KTR-N dated 2019-11-06 BoWex-ELASTIC® Operating/Assembly instructions Type HEW, HEW Compact and HEW-ZS 10 KTR-N Sheet: Edition: 40114 EN 27 of 27 10 Enclosure A Advice and instructions regarding the use in potentially explosive atmospheres 10.7 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 BoWex-ELASTIC® highly flexible flange 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 BoWex-ELASTIC® 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 2022-08-03 Pz i. A. Andreas Hücker Product Manager Replacing: Replaced by: KTR-N dated 2019-11-06 ">

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Key features
- Highly flexible
- Dampens torsional vibrations
- Reduces shocks
- Isolates noise
- Compensates for shaft misalignment
- Suitable for potentially explosive atmospheres
Frequently asked questions
KTR offers BoWex-Elastic couplings in types HEW, HEW Compact, and HEW-ZS. Each type has its own specific features and applications. You can find details of each type in the technical data section of the viewed document.
The choice of BoWex-Elastic coupling depends on factors like torque, speed, and the level of misalignment you need to accommodate. Refer to the selection instructions in the KTR drive technology catalogue ‘BoWex-ELASTIC®’ mentioned in the viewed document for guidance. If you need assistance, contact KTR directly.
The maximum permissible bore diameter varies depending on the coupling size. You can find the specific values in the technical data tables within the viewed document.
The assembly process depends on the specific BoWex-Elastic type. Detailed assembly instructions with diagrams are provided in chapter 4 of the viewed document. Be sure to follow these instructions carefully and ensure safety by securing the drive train against accidental switch-on.