DISC-O-FLEX SPACER COUPLING Rathi Disc-O-Flex couplings are fully metallic couplings, consisting of two hubs, one centre spacer member, two sets of stainless steel element blades bolted together with high tensile bolts Replacement of element blades is easy, simple and is possible without disturbing drive or driven equipment. FEATURES High power-to-weight ratio. No wearing parts, no lubrication required. Easy installation with ‘Drop Out’ spacer. ‘Accommodates angular, parallel and axial misalignments. Non stainless steel parts coated with a durable anticorrossive coating. High temperature application. Replaceable element blades with adapter. Visual inspection possible without disassembling equipment. Innerently balanced. High torsional rigidity with low axial sttiness. Special options including spacer lengths, modified hubs, special materials are available Floating shaft / cooling tower couplings are available. Backlash tree High speed capability. Dynamic balancing to customer specifications. Machined to high precision standards, Lightweight couplings. Specially suitable for Petrochemical & Fertilizer Industries. API610 & API.671 compliance availble on request. eee eee gegen egaes Coupling with antily features.DISC-O-FLEX SPACER COUPLING Selection Procedure: 1. Select an appropriate SERVICE FACTOR from table given below. 2 Multiply the rated running power by the service factor. This gives DESIGN POWER atrated speed (rpm). 3. Now convertthis to design power at 1000 rpm. This is used as a basis for coupling selection. 4. Refertothe rating column and read untilthe power greater than or equal to the design power at 1000 rpmis found. The size ofthe couplingis given inthe corresponding first column. 5 Selecteither standard type | ortype II hubs to suit shaft sizes, 6 Specify the distance between shaft ends (DBSE) Service Factor : Suggested service factors for electric motor, steam turbine, and gas turbine drivers are given below: Duty Service Factor Constant Torque Centrifugal Pump, 1.0 Centrifugal Compressor ‘Axial Compressor Centrifugal Blower Slight Torque Screw Compressor 15 Fluctuation Gear, Lobe and Vane Pumps Forced Draft Fan Medium Duty Mixer Lobe Blower ‘Substantial Reciprocating Pumps, 20 Torque Heavy Duty Mixers Fluctuation Induced Draft Fans * Use a minimum service factor of 1.25 on electric motor drives through a gearbox.DISC-O-FLEX SPACER COUPLING Gaia oe Rating kW] Max Peak ‘Weight Transmission Unit | Weight Unbored Hubs Kg [Coupling] at 1000 | Continuous | Overload ee) a ia oes] ow ry ea rpm __| Torque Nm_| Torque Nm ea ‘om " 13 13 124 310 25500 15 34 10) 19) 33 33 315 790 20000 3.0 5.0 14 3: 7 75 716 1790 16500 56 65 36 58 135 135 1289) 3220 14400) 93) 705 59 87, 230 230 2196) 5490) 72000) 740) 730 80 140) 350 350 3342 6360 70500 187 22.0 164 500 500 e775 11840 9500) 256 220 20 740 740 7066 17670 000 342 275 300) 30 330 2881 2200 7000) 440 40.0 380) 7400 7400 73369 38400 6000 540 40.0 B24 © Note that for the complete coupling, weights of two appropriate hubs plus a transmission unit are required ALLEN KEY r r BSE HUB TYPE HUB TYPE Bae ee UY Coupling Max. Bore DBsE Std. sere | eae] ames | vase [er fat “ ee a = ef fs 19 [o_| we 2 ca | as [mo] oo | 183 [as | vos | oo Ls 75 [es [90 [307 | yay ss | 120 [90 | 120 ves [ ao | woo | ver] too [oe] tsa | 102 | v7 230, 90 121 133 250 vo | 179 131 | 135, aso_[ wis] = | 09 coer [te | so [ar [= es [ee [oe | mao wo [=| ea] 18 for [eer [208 | a0 [155 [ = [88 is [ ee [ea [= woop me | =| 175 veo | oor | 28 | Notes:- © Non Standard DBSE available on request. Available for non-sparking application on request. Please specify type of Hub. Mis only for hub type I For vertical installation contact RATHI eeeeeBATH DISC-O-FLEX SPACER COUPLING Coupling Alignment Correct installation and alignment of couplings is essential for reliable machinery performance, GSS N a ‘Max Adal Wisalgnment* | __ Mx Parallel Misalignment "= ‘The angular and axial restoring forces in the table below left are given at maximum deflections, The chart can be used to determine forces across the full deflection range. The nonlinear characteristics can dotune a sysiom to provent high amplitude axial vibration [eouping a0 arm | Eee | mm ‘esiong “i eo FORCE vs DEFLECTION eo 210 290 “4 za _| 495 20 038 a 3" ms 150 360 045 3 % E vos 200 50 055 18 38 zo | 2 70 260 7 Ee a a ae 235 0 | 425 1470 oe eo ao woo | 500 270 088 13 8 2 x NOTES: # Mocis NEMAcnd oat specfeaton witout modieaton, *# aos bases on angular dofecton of par end and "oa 80 5100 ponsbleyinereasingeimensonS % Max. Displacement Coupling Size 1400 7 Balance Recommendations onal May Be Required The inherent balance of the RSK range meets AGMA standard 0350 9000-C90 class 9. The adjacent chart relates the RSK sizos to a operating speeds on the basis of this AGMA class 9 characteristic to provide a general guide to determine if dynamic on35 balanceimprovementis necessary. Balance 075 / mprovement When balancing improvement is requested. RATHI wil Not Generatly <éynamically balance the transmission unit. Hubs may also be Required ‘ynamically balanced, and this will usualy be carried out ater 33 machining the bore bu before cuting single keyways. 13 ON; “ya S67 8510 15 20: All dimensions are in mm unless otherwise specified por notice. Operating Spoed (in thousand rpm) In view of our constant endeavour to improve quality of our products, we reserve the right to alter_or change specifications without ‘© Tris documents the intellectual property of Rathi Transpower Put. Lid. and subject to copyright ‘Rathi Transpower Pvt Lid setrmreigemnoortne ma “onary rahroup com Distibutor RDDISTTDISC-O-FLEX SPACER COUPLING Rathi Disc-O-Flex couplings are fully metallic couplings, consisting of two hubs, one centre spacer member, two sets of stainless steel element blades bolted together with high tens is possible without disturbing drive or driven equipment. Selection Procedure: 1. Select an appropriate SERVICE FACTOR from table given below, 2 Multiply the rated running power by the service factor. This gives DESIGN POWER at rated speed. (pm. 3. Now convert this to design power at 1000 rpm. This is used asa basis for coupling selection Refer to the rating column and read until the power greater than or equal to the design power at 1000 rpm is found. The size of the coupling is given in the corresponding first column, 5. Select either standard type | or type Il hubs to suit shaft sizes. Specify the distance between shaft ends (DBSE) Service Factor : seeegeeeee eae cee ened bolts. Replacement of element blades is easy, simple and FEATURES High power-to-weight ratio, No wearing parts, no lubrication required. Easy installation with ‘Drop Out’ spacer. ‘Accommodates angular, parallel and axial misalignments. Non stainless steel parts coated with a durable anticorrossive coating High temperature application. Replaceable element blades with adapter. Visual inspection possible without disassembling equipment. inherently balanced High torsional rigiity with low axial stitiness, ‘Special options including spacer lengths, ‘modified hubs, special materials are available. Floating shaft / cooling tower couplings are available. Backlash free. High speed capability Dynamic balancing to customer specifications. Machined to high precision standards, Lightweight couplings. ‘Specially suitable for Petrochemical & Fertilizer Industries API 610 & API 671 compliance availble on request. Coupling with antl features. Suggested service factors for electric motor, steam turbine, and gas turbine drivers are given below: Duty Service Factor Axial Compressor e Centrifugal Blower * Gear, Lobe and Vane Pumps Torque Induced Draft Fans ® Fluctuation é * Use a minimum service factor of 1,25 on electric motor drives through a gearbox,DISC-O-FLEX SPACER COUPLING Seeley ay wey Rating kW] Max. Peak Weight Transmission Unit | Weight Unbored Hubs - Ka) Couptna| "Ste00 | contmaous | overioaa | MO Se ‘pm. | Torguenm | torque im mn I f 8 18 24 aro 5500 is an io 18 ra 38 a5 70 [20000 [20 50 14 a 75 75 m6 [ i790 | 16500 | 58 65 a6 58 ies 195 | taeo[a220 [vaso |e ios 59 a7 a0 [a0 [2196 [00 | v2000 [40 190 ao 140 aso 250 | soa | e260 10500 | vez zo | 16a : soo [soo [arr [ tio | 9500 as zo | 10 E 70 ra _| 700s | vero | o000 | a4 z7s__| sa : sao [ao [066 [aza00 | T0009 [aa woo | 380 : ‘00 ‘400 t9960 | ase00 [sooo] sa woo | sa : © Note that forthe complete coupling, weighs of wo appropriate hubs pus a ransmission unit are required eee ee] Sete | ote [ex faa | co | a” re ee ws | 19 [ao [es | [oo a a Notes vos nyrea 360116 198 so_| so7 [169 soo | ‘8 sp aee | 8 &- Recto fr novspartng oppican on oqust, T4040 vs | 39 [tor [ae | 06 lene specty pe ot ab | 785 5 Te [ae | ae Mis only for hub type I 1400 172 175 130 | 297 | 248 © For vertical installation contact RATHL Coupling Alignment : correc installation and alignment of couplings is essental for reliable machinery performance FORCE vs DEFLECTION oun Se Ingroveret Map Roe ot eneay squid &, % Max. Restoring Moment orang Speed Gta) ‘© Alldimensions are in mm unless otherwise specified. In view of our constant endeavour to improve qually of our products, we reserve the right oalter_or change specifications without prior notice. ‘© This documents the intellectual property of Rathi Transpawer Pvt Lid. and subject to copyright Rathi Transpower Pvt Lid | Dstibor setrmreigemnoortne Erna“ enauins@rairoup com 7 FDS