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Highly flexibleGKN StromagPeriflex®
Disc Couplings
EN 04_2013
GKN Stromag Periflex® disc coupling
- 4 -
The GKN Stromag Periflex® disc coupling concept GKN Stromag PVN couplings are highly flexible elastomer couplings with linear spring characteristics ideal for diesel engine drives. The Series covers the torque range 160 – 63,000 Nm. The external companion di-mensions conform as standard to the flywheel connections under the SAE standard J620. The larger couplings are basically designed with metric flywheel connections.The PVN coupling allows fast and simple connection of a flange, specifically a fly-wheel, to a shaft. Some designs also allow the connection of two shafts. The PVN coupling is a coupling that features an axial plug-in connection for easy installation and removal, for both the entire coupling and the flexible element.At the fully intermeshing teeth on the connection ring, the disc tyre can be displaced along its axis by several millimetres when no torque is applied.Each PVN size comes with a range of elastomer qualities and torsional spring stiffnesses. These allow precise configurations for drives susceptible to torsional vibrations.
Application fieldsGKN Stromag PVN couplings are designed for use on piston engines. The connection ring can be bolted directly to the flywheel of an engine or compressor. Its axial plug-in design presents particular advantages e.g. for installations under bell covers.Other application fields are electrical assemblies; compressors; construction machin-ery; engine and shipbuilding; and general machinery.
GKN Stromag Periflex® disc coupling
- 5 -
Instructions for the designerThe PVN coupling hubs are of steel or ductile cast iron. The connection ring is of aluminium. The disc tyres consist of a steel or ductile cast iron V ring with a lining of vulcanised elastomer. The variants of natural rubber (NR) can be used at tempera-tures of -50 °C to +80 °C. The variants of temperature resistant material (ECO) can be used at temperatures of -40 °C to +120 °C. In addition, ECO is resistant to ozone and oil. Damping work may cause the flexible element to reach temperatures higher than am-bient. This must be considered when the coupling is to be fitted with a guard or cowl, and adequate ventilation and heat dissipation must be provided.
The PVN coupling can be delivered with EN 10204 acceptance as defined in the clas-sification societies’ rules.
The coupling complies with the requirements under API 671 with consideration to our list of deviations TM 800.0010.This list of deviations is available from the GKN Stromag departments.
Use in potentially explosive environmentsThe coupling conforms to the requirements under Directive 94/9/EC (ATEX 95) and can be used as follows:a. Zone 1 (gas, Category 2G) in Groups IIA, IIB, and IIC, T4b. Zone 2 (gas, Category 3G) in Groups IIA, IIB, and IIC, T4c. Zone 22 (dust, Category 3D) for dusts with a minimum ignition energy
> 3 mJ, T 125 °C
The Periflex® PVN compliance with the requirements for each of these zones/catego-ries is documented in the form of the following codes on our products:
Use in gas atmospheres:
II 2G c T4
Use in dust atmospheres:
II 3D c 125 ºC
Use in potentially explosive environments must be based on the request form an-nexed to this catalogue.
Classification rulesThe acceptance of a coupling by a classification society must observe the rules is-sued by this society. Under certain circumstances, the coupling characteristics may differ from the definitions provided in this catalogue. In such events, prepared data sheets are available on request. A number of classification societies prescribe fail-safe devices on ships’ main drives.
GKN Stromag Periflex® disc coupling
- 6 -
The static and dynamic characteristics of GKN Stromag PVN couplings are available. These can help in the choice of a coupling size suitable for the specific application. The key factors are the loads induced by the transferred power and torsional vibra-tions. Stationary operating modes must be based on TKN, TKW, and PKV, nonstationary operating modes on the TKmax values.GKN Stromag departments can provide support, specifically in calculating the tor-sional vibrations. We therefore ask you to complete and send us the question sheet annexed to this catalogue. As a rule, flexible couplings are a safety feature in the form of a predetermined break-ing point on a drive train. Hence, overloading a drive train generally leads to failure of the flexible coupling element. This behaviour is intentional and protects the entire system from unforeseen damage. Any consequential damage arising from this safety function of the coupling must be considered in advance by the system designer and monitored or eliminated with suitable measures.
Instructions on choosing the coupling size
Fail-safe deviceThe Stromag PVN coupling is available with an fail-safe device. A rupture in the flexible element causes claws to intermesh, forming a torsionally rigid, backlash connection between the drive and output sides. Temporary emergency operation is possible with limited torque. The maximum torques and speeds must be calculated separately on the basis of torsional vibrations transferred via a torsionally rigid structure.
GKN Stromag Periflex® disc coupling
- 7 -
Installation instructions and scope of deliveryThe GKN Stromag PVN coupling is fitted with a connection ring (1) that allows it to be bolted directly to the engine’s flywheel. The hub (3) of the disc tyre (2) is secured to the machine with bolts (4).The drive and output sides are moved together to the prescribed distance (blind installation), whereby the tyre’s teeth must engage over the entire length of the connection ring.The maximum displacements can be taken from the dimensions and ratings tables.
Delivery of the standard version includes:
1 = connection ring2 = disc tyre3 = hub4 = bolts
Storing flexible rubber elementsWhen stored properly, flexible rubber elements retain their properties over several years. It is essential here that the stored parts are protected against oxygen, ozone, light, heat, moisture, and solvents. Solvents, fuels, lubricants, chemicals, acids, dis-infectants, and similar may not be stored in the same room. The storage temperature should not be lower than +10 °C and no higher than +25 °C.All UV light sources are harmful and must be avoided. Equipment that generates ozone, e.g. light sources and electric motors, must be kept away from the storage location. The relative air humidity should not exceed 65%.
Further details can be taken from the DIN 7716 sheet.
GKN Stromag Periflex® disc coupling
- 8 -
Coupling size
Tyre
Nominal torque
Max torqueAdm.
alternating torque
Adm. radial displace-
ment
Radial stiffness
Torsional stiffness
Relative damping
Adm. damp-ing power
SAEconnection
MaxSpeed
TKN
NmTKmax (1)
NmTKW
Nm∆Kr
mmCr dyn (4)N/mm
CT dyn (2) (4)Nm/rad
ψ (2) (4) PKV 60 (3) (5)W
nmax
min-1
PVN 183
VN 18311VN 18331VN 18321VN 18341VN 18351
160200200200200
480480480480480
80100100100100
0,4
375600730900
1500
11501510190022403910
0,800,961,001,201,30
104104104104104
6 ½“7 ½“8“
500044004000
PVN 230
VN 23011VN 23031VN 23021VN 23041VN 23051
250315315315315
750750750750750
125155155155155
0,5
400650800950
1600
15102000276032605690
0,800,961,001,201,30
156156156156156
8“10“
40003600
PVN 280
VN 28011VN 28031VN 28021VN 28041VN 28051
400500500500500
12001200120012001200
200250250250250
0,6
350750900
10601750
22803300416049208580
0,800,961,001,201,30
221221221221221
10“11 ½ “
3600360
PVN 283
VN 28311VN 28331VN 28321VN 28341VN 28351
630800800800800
19001900190019001900
315400400400400
0,6
5001050127015002450
3760545072008120
14170
0,800,961,001,201,30
234234234234234
10“11 ½“
36003600
PVN 350
VN 35011VN 35031VN 35021VN 35041VN 35051
10001250125012501250
30003000300030003000
500625625625625
0,7
7501200150018003000
766011100139901654028860
0,800,961,001,201,30
260260260260260
11 ½“14
36003000
PVN 358
VN 35811VN 35831VN 35821VN 35841VN 35851
16002000200020002000
48004800480048004800
8001000100010001000
0,5
3400510063007650
12600
1670024200332003606058500
0,800,961,001,201,30
260260260260260
11 ½“14“
36003000
PVN 430
VN 43011VN 43031VN 43021VN 43041VN 43051
16002000200020002000
48004800480048004800
8001000100010001000
0,9
6601400170020003300
780011300139001684029380
0,800,961,001,201,30
494494494494494
14“18“
30002400
PVN 433
VN 43311VN 43331VN 43321VN 43341VN 43351
25003150315031503150
75007500750075007500
12501550155015501550
0,8
14002300287034505700
1863027000340204023070200
0,800,961,001,201,30
520520520520520
14“18
30002400
PVN 436
VN 43611VN 43631VN 43621VN 43641VN 43651
40005000500050005000
1200012000120001200012000
20002500250025002500
0,7
23003800475057009400
2540034600466005364093600
0,800,961,001,201,30
572572572572572
14“16“18“
300026002400
PVN 439
VN 43911VN 43931VN 43941VN 43951
3200400040004000
10000100001000010000
1600200020002000
0,7
1750260039006500
362305250076000
136500
0,800,961,201,30
390390390390
14“16“18“
300026002400
PVN 544
VN 54411VN 54431VN 54421VN 54441VN 54451
63008000800080008000
1900019000190001900019000
31504000400040004000
0,8
310051007600
1140017100
6279091000
114700135600226400
0,800,961,001,201,30
622622622622622
18“21“
24001800
PVN 549
VN 54911VN 54931VN 54921VN 54941VN 54951
800090009500
1100012000
1700020000210002200025000
40004500475055006000
0,8
60009000
112501350022000
88320128000161300204700332800
0,800,961,001,201,30
650650650650650
18“21“
24001800
PVN 666
VN 66611VN 66631VN 66621VN 66641VN 66651
1600020000200002000020000
4800048000480004800048000
800010000100001000010000
0,8
610010200152002280034200
111800162000205000241400428500
0,800,961,001,201,30
11001100110011001100
21“24“
18001800
PVN 726
VN 72611VN 72631VN 72621VN 72641VN 72651
2850031500315003150031500
6850075500755007550075500
1425015750157501575015750
0,8
708011800176302645039670
225000300000370000530000950000
0,800,961,001,201,30
13001300130013001300
24“ 1500
PVN NR Series output table
GKN Stromag Periflex® disc coupling
- 9 -
Coupling size
Tyre
Nominal torque
Max torqueAdm.
alternating torque
Adm. radial displace-
ment
Radial stiffness
Torsional stiffness
Relative damping
Adm. damp-ing power
SAEconnection
MaxSpeed
TKN
NmTKmax (1)
NmTKW
Nm∆Kr
mmCr dyn (4)N/mm
CT dyn (2) (4)Nm/rad
ψ (2) (4) PKV 60 (3) (5)W
nmax
min-1
PVP 433
VN 43311VN 43331VN 43321VN 43341VN 43351
50006300630063006300
1500015000150001500015000
25003100310031003100
0,8
2800460057406900
11400
37260540006804080460
140400
0,800,961,001,201,30
10401040104010401040
18“ 2400
PVP 436
VN 43611VN 43631VN 43621VN 43641VN 43651
800010000100001000010000
2400024000240002400024000
40005000500050005000
0,7
460076009500
1140018800
508006920093200
107300187200
0,800,961,001,201,30
11401140114011401140
18“ 2400
PVP 439
VN 43911VN 43931VN 43941VN 43951
6400800080008000
20000200002000020000
3200400040004000
0,7
350052007800
13000
72460105000152000273000
0,800,961,201,30
780780780780
18“ 2400
PVP 544
VN 54411VN 54431VN 54421VN 54441VN 54451
1260016000160001600016000
3800038000380003800038000
63008000800080008000
0,8
620010200152002280034200
125600182000229300271200452800
0,800,961,001,201,30
12401240124012401240
21“ 1800
PVP 549
VN 54911VN 54931VN 54921VN 54941VN 54951
1600018000190002200024000
3400040000420004400050000
800090009500
1100012000
0,8
1200018000225002700044000
176600256000322600400400665600
0,800,961,001,201,30
13001300130013001300
21“ 1800
PVP 666
VN 66611VN 66631VN 66621VN 66641VN 66651
3200040000400004000040000
9600096000960009600096000
1600020000200002000020000
0,8
1220020400304004560068400
223600324000410000482800857000
0,800,961,001,201,30
22002200220022002200
24“ 1800
PVP 726
VN 72611VN 72631VN 72621VN 72641VN 72651
5700063000630006300063000
137000151000151000151000151000
2850031500315003150031500
0,8
1416023600352605290079340
450000600000740000
10600001900000
0,800,961,001,201,30
26002600260026002600
metrisch 1500
PVP NR Series ratings table
1) The values listed in the tables refer to the disc tyre characteristics.2) For: TW = 0.2 • TKN; T = 0.8 • TKN; f = 10 Hz; ϑ = 30 °C3) This value must be reduced by the temperature factor when the coupling tem-
peratures are higher than 30 °C.4) Tolerances on the materials may be as high as ±15%.
5) The PKV 60 value represents the damping power that can be absorbed over a period of 60 minutes. The damping power that can be absorbed permanently is PKV∞ = 0.5 • PKV 60.
NR factors
Tem
pera
ture
fact
or S
ϑPK
V
Ambient temperature [ºC]
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.220 30 40 50 60 70 80 90
GKN Stromag Periflex® disc coupling
- 10 -
PVN ECO Series ratings table
Coupling size
Tyre
Nominal torque
Max torqueAdm.
alternating torque
Adm. radial displace-
ment
Radial stiffness
Torsional stiffness
Relative damping
Adm. damping
power
SAEconnection
MaxSpeed
TKN
NmTKmax (1)
NmTKW
Nm∆Kr
mmCr dyn (4)N/mm
CT dyn (2) (4)Nm/rad
ψ (2) (4) PKV 60 (3) (5)W
nmax
min-1
PVN 183 VN 18314VN 18324
150200
450480
75100 0,4 375
73015503650
0,81,0
104104
6 ½“8“
50004000
PVN 230 VN 23014VN 23024
230315
690750
120155 0,5 400
80016504500
0,81,0
156156
8“7 ½“10“
400044003600
PVN 280 VN 28014VN 28024
360500
11001200
180250 0,6 350
90026006200
0,81,0
221221
10“11 ½ “
36003600
PVN 283 VN 28314VN 28324
570800
17001900
290400 0,6 500
127041008300
0,81,0
234234
10“11 ½“
36003600
PVN 350 VN 35014VN 35024
10001250
30003000
500625 0,7 750
15008450
218500,81,0
260260
11 ½“14“
36003000
PVN 358 VN 35814VN 35824
14002000
42004800
7001000 0,5 3400
63001680038200
0,81,0
260260
11 ½“14“
36003000
PVN 430 VN 43014VN 43024
14002000
42004800
7001000 0,9 660
17008200
208000,81,0
494494
14“18“
30002400
PVN 433 VN 43314VN 43324
23003150
69007500
11501550 0,8 1400
28702175035200
0,81,0
520520
14“18“
30002400
PVN 436 VN 43614VN 43624
36005000
1080012000
18002500 0,7 2300
47503430053600
0,81,0
572572
14“16“18“
300026002400
PVN 439 VN 43914VN 43924
23004000
69007500
11502000 0,7 1750
33003750060950
0,81,0
390390
14“16“18“
300026002400
PVN 544 VN 54414VN 54424
57008000
1700019000
29004000 0,8 3100
760061000
1041000,81,0
622622
18“21“
24001800
PVN 549 VN 54914VN 54924
72009000
1530020000
36004500 0,8 6000
1125081400
1415000,81,0
650650
18“21“
24001800
PVN 666 VN 66614VN 66624
1440020000
4320048000
720010000 0,8 6100
15200121500235800
0,81,0
11001100
21“24“
18001500
GKN Stromag Periflex® disc coupling
- 11 -
PVP ECO Series ratings table
Coupling size
Tyre
Nominal torque
Max torqueAdm.
alternating torque
Adm. radial displace-
ment
Radial stiffness
Torsional stiffness
Relative damping
Adm. damping
power
SAEconnection
MaxSpeed
TKN
NmTKmax (1)
NmTKW
Nm∆Kr
mmCr dyn (4)N/mm
CT dyn (2) (4)Nm/rad
ψ (2) (4) PKV 60 (3) (5)W
nmax
min-1
PVP 433 VN 43314VN 43324
46006300
1380015000
2300 3100 0,8 2800
57404350070400
0,8 1,0
10401040 18“ 240
PVP 436 VN 43614VN 43624
720010000
2160024000
36005000 0,7 4600
950068600
1072000,81,0
11401140 18“ 2400
PVP 439 VN 43914VN 43924
46008000
1380015000
23004000 0,7 3500
660075000
1219000,81,0
780780 18“ 2400
PVP 544 VN 54414VN 54424
1140016000
3400038000
58008000 0,8 6200
15200122000208000
0,81,0
12401240 21“ 1800
PVP 549 VN 54914VN 54924
1440018000
3060040000
72009500 0,8 12000
22500162800282900
0,81,0
13001300 21“ 1800
PVP 666 VN 66614VN 66624
2880040000
8640096000
1440020000 0,8 12200
30400243000471500
0,81,0
22002200 24“ 1500
1) The values listed in the tables refer to the disc tyre characteristics.2) For: TW = 0.2 • TKN; T = 0.8 • TKN; f = 10 Hz; ϑ = 30 °C3) This value must be reduced by the temperature factor when the coupling tem-
peratures are higher than 30 °C.4) Tolerances on the materials may be as high as ±15%.
5) The PKV 60 value represents the damping power that can be absorbed over a period of 60 minutes. The damping power that can be absorbed permanently is PKV∞ = 0.5 • PKV 60.
ECO factors
Tem
pera
ture
fact
or S
ϑPK
V
Ambient temperature [ºC]
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.220 30 40 50 60 70 80 90 100 110 120 130
GKN Stromag Periflex® disc coupling
- 18 -
B side
A side
Bores k
B side
A side
Bores k
PVN 183...430
Size PVN 183 PVN 230 PVN 280 PVN 283 PVN 350 PVN 358 PVN 430
Tyre
VN 18311VN 18331VN 18321VN 18341VN 18351
VN 23011VN 23031VN 23021VN 23041VN 23051
VN 28011VN 28031VN 28021VN 28041VN 28051
VN 28311VN 28331VN 28321VN 28341VN 28351
VN 35011VN 35031VN 35021VN 35041VN 35051
VN 35811VN 35831VN 35821VN 35841VN 35851
VN 43011VN 43031VN 43021VN 43041VN 43051
SAE con-nection 6½“ 8“ 8“ 10“ 10“ 11½“ 10“ 11½“ 11½“ 14“ 11½“ 14“ 14“ 18“
215,9200−4321861
263,5244,5
−4321861
263,5244,5
−5026670
314,4295,3
−5026670
314,4295,3
−5531675
352,4333,4
−5531675
314,4295,3
256531690
352,4333,4
256531690
352,4333,4
3580355112
466,7438,2
3580355112
352,4333,4
3585355120
466,7438,2
3585355120
466,7438,2
3585468120
571,5542,9
3585468120
Bore k mm 6x9 6x11 6x11 8x11 8x11 8x11 8x11 8x11 8x11 8x13,5 8x11 8x13,5 8x13,5 6x17,5
1089360458
1089360458
1139865
48,510
1139865
48,510
125110705510
125110705510
1581561055510
1581561054010
1601471055510
1601471055510
1701641055510
1701641055512
1781611058015
1781611058020
JA side
JB side
Jrubber
0,01100,00210,0029
0,06410,00210,0029
0,02450,00390,0082
0,11200,00390,0082
0,05180,00780,0197
0,13930,00780,0197
0,0380,0170,021
0,0520,0170,021
0,08080,03430,038
0,1790,0340,038
0,08080,0650,044
0,18430,0650,044
0,3170,0470,151
0,6450,0470,151
Mass kg 3,3 5,0 3,9 7,7 7,0 10,4 9,3 9,9 13,1 15,5 16,5 18,9 21,4 26,3
abdprev
dmax
fh
lI1
nos
DD-_806794 DD-_806808
PVN…R Series
Dia
met
er m
mLe
ngth
s m
mM
ass
mom
ent o
f in
ertia
kg m
2
GKN Stromag Periflex® disc coupling
- 19 -
B side
A side
B side
A side
Bores k Bores k
PVN 433...666
Size PVN 183 PVN 230 PVN 280 PVN 283 PVN 350 PVN 358 PVN 430
Tyre
VN 18311VN 18331VN 18321VN 18341VN 18351
VN 23011VN 23031VN 23021VN 23041VN 23051
VN 28011VN 28031VN 28021VN 28041VN 28051
VN 28311VN 28331VN 28321VN 28341VN 28351
VN 35011VN 35031VN 35021VN 35041VN 35051
VN 35811VN 35831VN 35821VN 35841VN 35851
VN 43011VN 43031VN 43021VN 43041VN 43051
SAE con-nection 6½“ 8“ 8“ 10“ 10“ 11½“ 10“ 11½“ 11½“ 14“ 11½“ 14“ 14“ 18“
215,9200−4321861
263,5244,5
−4321861
263,5244,5
−5026670
314,4295,3
−5026670
314,4295,3
−5531675
352,4333,4
−5531675
314,4295,3
256531690
352,4333,4
256531690
352,4333,4
3580355112
466,7438,2
3580355112
352,4333,4
3585355120
466,7438,2
3585355120
466,7438,2
3585468120
571,5542,9
3585468120
Bore k mm 6x9 6x11 6x11 8x11 8x11 8x11 8x11 8x11 8x11 8x13,5 8x11 8x13,5 8x13,5 6x17,5
1089360458
1089360458
1139865
48,510
1139865
48,510
125110705510
125110705510
1581561055510
1581561054010
1601471055510
1601471055510
1701641055510
1701641055512
1781611058015
1781611058020
JA side
JB side
Jrubber
0,01100,00210,0029
0,06410,00210,0029
0,02450,00390,0082
0,11200,00390,0082
0,05180,00780,0197
0,13930,00780,0197
0,0380,0170,021
0,0520,0170,021
0,08080,03430,038
0,1790,0340,038
0,08080,0650,044
0,18430,0650,044
0,3170,0470,151
0,6450,0470,151
Mass kg 3,3 5,0 3,9 7,7 7,0 10,4 9,3 9,9 13,1 15,5 16,5 18,9 21,4 26,3
Size PVN 433 PVN 436 PVN 439 PVN 544 PVN 549 PVN 666
Tyre
VN 43311VN 43331VN 43321VN 43341VN 43351
VN 43611VN 43631VN 43621VN 43641VN 43651
VN 43911VN 43931
VN 43941VN 43951
VN 54411VN 54431VN 54421VN 54441VN 54451
VN 54911VN 54931VN 54921VN 54941VN 54951
VN 66611VN 66631VN 66621VN 66641VN 66651
SAE con-nection 14“ 18“ 14“ 16“ 18“ 14“ 16“ 18“ 18“ 21“ 18“ 21“ 21“ 24“
466,7438,2
35100468145
571,5542,9
35100468145
466,7438,2
40110468155
517,548940110468155
571,5542,9
40110468155
466,7438,2
40130468182
517,548940130455182
571,5542,9
40130455182
571,5542,9
40160572225
673,1641,4
40160572225
571,5542,9
55150572220
673,1641,4
55150572220
673,1641,4
60190692270
733,4692,2
60190692270
Bore k mm 8x13,5 6x17,5 8x13,5 8x13,5 6x17,5 8x13,5 8x13,5 6x17,5 12x17,5 12x17,5 12x17,5 12x17,5 12x17,5 12x20,0
2091991258015
2091991258020
23321813010015
23321813010020
23321813010020
20718813010515
22720815012025
22720815012025
319,530621010515
319,530621010525
307293,521010520
307293,521010525
32531019014215
32531019014231
JA side
JB side
Jrubber
0,3170,1390,204
0,6450,1390,204
0,3990,1970,246
0,5380,1970,246
0,7270,1970,246
0,4960,2570,145
0,6130,2690,145
0,8490,2690,145
0,9900,7790,490
1,6720,7790,490
0,9900,9110,502
1,6720,9110,502
2,8251,8401,565
3,3121,8401,565
Mass kg 32,2 37,1 38,6 41,0 43,5 39,9 43,9 47,1 78,6 51,2 80,6 88,2 133,2 137,0
abdprev
dmax
fh
lI1
nos
PVN…R Series
Dia
met
er m
mLe
ngth
s m
mM
ass
mom
ent o
f in
ertia
kg m
2
GKN Stromag Periflex® disc coupling
- 20 -
B side
A side
Bores k1
B side
A side
Bores k1
Bores k2
Bores k2
Size PVN 283 PVN 350 PVN 358 PVN 430
Tyre
VN 28311VN 28331VN 28321VN 28341VN 28351
VN 35011VN 35031VN 35021VN 35041VN 35051
VN 35811VN 35831VN 35821VN 35841VN 35851
VN 43011VN 43031VN 43021VN 43041VN 43051
SAE con-nection 10“ 11½“ 11½“ 14“ 11½“ 14“ 14“ 18“
314,4295,311795140316
352,4333,411795140316
352,4333,4140115170355
466,7438,2140115170355
352,4333,4150125175355
466,7438,2150125175355
466,7438,2150125180468
571,5542,9150125180468
Bore k mm
8x118xM14
8x118xM14
8x1112xM16
8x13,512xM16
8x1110xM16
8x13,510xM16
8x13,510xM16
6x17,510xM16
40−401010
40−401010
44−551210
44−551212
48−551210
48−551212
58−701215
58−701218
JA side
JB side
Jrubber
0,0380,00670,021
0,0520,00670,021
0,0780,01750,038
0,1790,01750,038
0,0780,03630,044
0,1790,03630,044
0,2790,0250,151
0,5590,0250,151
Mass kg 4,8 5,4 7,6 10,0 9,0 11,4 14,4 18,5
1) contains 4 vent bores
DD-_806852 DD-_806853
ab1
b2
d1
d2
f
lI1
nos
4 Vent bores offset by um 90º vers.
PVN…R/ON Series
Dia
met
er m
mLe
ngth
s m
mM
ass
mom
ent o
f in
ertia
kg m
2
GKN Stromag Periflex® disc coupling
- 21 -
Size PVN 433 PVN 436 PVN 439 PVN 544 PVN 549 PVN 666
Tyre
VN 43311VN 43331VN 43321VN 43341VN 43351
VN 43611VN 43631VN 43621VN 43641VN 43651
VN 43911VN 43931
VN 43941VN 43951
VN 54411VN 54431VN 54421VN 54441VN 54451
VN 54911VN 54931VN 54921VN 54941VN 54951
VN 66611VN 66631VN 66621VN 66641VN 66651
SAE con-nection 14“ 18“ 14“ 16“ 18“ 14“ 16“ 18“ 18“ 21“ 18“ 21“ 21“ 24“
466,7438,2180145215468
571,5542,9180145215468
466,7438,2190155230468
517,5489190155230468
571,5542,9190155230468
466,7438,2220185253468
517,5489220185253455
571,5542,9220185253455
571,5542,9270230310572
673,1641,4270230310572
571,5542,9270230310572
673,1641,4270230310572
673,1641,4320275364692
733,4692,2320275364692
Bore k mm
8x13,512xM20
6x17,512xM20
8x13,510xM20
8x13,510xM20
6x17,510xM20
8x13,58xM20
8x13,58xM20
6x17,58xM20
12x17,520xM20
12x17,520xM20
12x17,512xM27
12x17,512xM27
12x17,520xM27
12x20,020xM27
76−801615
76−801620
90−
1001615
90−
1001620
90−
1001620
63−
1051815
63−
1201825
63−
1201825
100−
1052215
100−
1052225
87,5−
10522,520
87,5−
10522,525
126,5−
1423015
126,5−
1423031
JA side
JB side
Jrubber
0,3190,080,204
0,6300,080,204
0,3990,120,246
0,5380,120,246
0,7270,120,246
0,4960,1290,145
0,6130,1290,145
0,8490,1290,145
0,9900,3150,490
1,6720,3150,490
0,9900,4910,502
1,6720,4910,502
2,8250,921,565
3,4250,921,565
Mass kg 20,6 25,2 25,5 26,9 31,2 23,1 25,1 28,3 37,7 45,1 41,5 49,0 77,1 81,9
1) contains 4 vent bores
ab1
b2
d1
d2
f
lI1
nos
B side
A side
Bores k1
B side
A side
Bores k1
Bores k2
Bores k2
DD-_806852 DD-_806853
4 Vent bores offset by um 90º vers.
PVN…R/ON Series
Dia
met
er m
mLe
ngth
s m
mM
ass
mom
ent o
f in
ertia
kg m
2
GKN Stromag Periflex® disc coupling
- 32 -
∆Kw
Max angular displacement of the coupling. The shafts’ angular displacement ∆WW must be less than ∆KW.
A ∆KW value of 0.5° is permitted for PVN couplings. This value, however, may be utilised to the full only when there are no other options for shaft displacement.
∆Kw ≥ ∆Ww
TKN
The coupling’s nominal torque can be permanently transferred over the whole permitted speed range. It must be higher than the system’s nominal torque TN. TKN ≥ TN
An application factor of 1.2 is recommended for the simple design of a drive system based exclusively on the nominal torque. TKN ≥ TN • 1,2
TKw
The admissible permanent alternating torque describes the amplitude of the max permanent periodic torque fluctuation. This torque may be superimposed on a base load equal to TKN. This requires in addition an analysis of the max damping power PKV.
∆Ka
Max axial displacement of the coupling. The shafts’ axial displacement ∆Wa must be less than ∆Ka.
The axial displacement for PVN couplings depends on the installed connection ring. The disc tyre must always lie over its full width in the connection ring.
∆Ka ≥ ∆Wa
∆Kr
Max radial displacement of the coupling. The shafts’ radial displacement ∆Wr must be less than ∆Kr.
∆Kr ≥ ∆Wr
GKN Stromag PVN coupling characteristics
TKmax
The coupling´s max torque TKmax can be endured as a peak load and may not be exceeded by peak torques Tmax1 when the system is operating in normal, nonstationary mode.
A system’s normal nonstationary modes are unavoidable and occur repeatedly (e.g. starting/stopping, resonance passes, switchovers, accelerations, etc.).
TKmax ≥ Tmax1
Overloading the PVN coupling with peak torques Tmax2 in a system’s anomalous nonstationary mode shortens the service life and is tolerated in individual cases.
A system’s anomalous nonstationary modes are avoidable and are not part of the planned operating scheme (e.g. emergency stops, sync failure, short circuits, etc.).
TKmax • 1,5 ≥ Tmax2
GKN Stromag Periflex® disc coupling
- 33 -
CTdyn
The dynamic torsional spring stiffness represents the ratio of torque amplitude to torque angle during an oscillation.
The torque amplitude is superimposed on an initial load (coupling torque). The PVN cou-pling’s CTdyn value remains constant over the coupling torque (linear characteristic curve), but changes with the amplitude, frequency, and temperature of the flexible element.
The specified nominal values for CTdyn are based on a coupling torque of 0.8 • TKN, an alternating torque of 0.2 • TKN, and a frequency of 10 Hz on a coupling at operating temperature, with a surface temperature of about 30 °C.
CTdyn =
CTdyn warm takes into account that high power dissipation causes the coupling to heat up. CTdyn warm = 0,7 • CTdyn
CTdyn A takes into account the effects of a small alternating torque amplitude. CTdyn A = 1,35 • CTdyn
Calculations of torsional vibrations in the system are recommended to include CTdyn (warm) (0.7) and CTdyn A (1.35).
Tel
ϕw
GKN Stromag PVN coupling characteristics
Ca
The axial spring stiffness represents the ratio of axial reaction force to axial displacement. PVN couplings do not generate axial forces when the disc tyre lies over its full width in the connection ring.
Ca = 0
Cr
The radial stiffness represents the ratio of radial reaction force to radial displacement. The specified values apply to the coupling at operating temperature, with a surface temperature of about 50 °C.
GKN Stromag Periflex® disc coupling
- 34 -
Coupling design, question sheet
Engine-Side
Engine typeEngine power P [kW]Engine speed n [rpm]Inline/V engine R/V (angle)Number of cylinders zMoments of inertia (engine + flywheel) J [kg m2]
Driven-Side
Kind of application(alternator, pump, compressor, etc.)TypeMoments of inertia J [kgm2]Shaft diameter d [mm]Shaft lenght I [mm]
PVN couplingInstallation space: enter required measurements in the diagram below
flyw
heel
engine casing alternatornumber
GKN Stromag Periflex® disc coupling
- 35 -
Use in potentially explosive environments, question sheet
Applications Group II (above ground)
Potentially explosive atmosphere of air and
gas
dust
Zone (Category)gas
Zone 1 (Category 2G)
Zone 2 (Category 3G)
dust Zone 22 not electrically conducting (Category 3D)
Temperature category in atmosphere with gas gas
T1
T2
T3
T4
Max surface temperature dust
125 °C
< 120 °C
-20 °C to +40 °C
Ambient temperature other ambient temperatures only with certain restrictions