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Highly flexible GKN Stromag Periflex ® Disc Couplings EN 04_2013

Highly flexible GKN Stromag Periflex Disc Couplings

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Page 1: Highly flexible GKN Stromag Periflex Disc Couplings

Highly flexibleGKN StromagPeriflex®

Disc Couplings

EN 04_2013

Page 2: Highly flexible GKN Stromag Periflex Disc Couplings

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.

Page 3: Highly flexible GKN Stromag Periflex Disc Couplings

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.

Page 4: Highly flexible GKN Stromag Periflex Disc Couplings

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.

Page 5: Highly flexible GKN Stromag Periflex Disc Couplings

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.

Page 6: Highly flexible GKN Stromag Periflex Disc Couplings

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

Page 7: Highly flexible GKN Stromag Periflex Disc Couplings

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

Page 8: Highly flexible GKN Stromag Periflex Disc Couplings

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

Page 9: Highly flexible GKN Stromag Periflex Disc Couplings

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

Page 10: Highly flexible GKN Stromag Periflex Disc Couplings

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

Page 11: Highly flexible GKN Stromag Periflex Disc Couplings

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

Page 12: Highly flexible GKN Stromag Periflex Disc Couplings

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

Page 13: Highly flexible GKN Stromag Periflex Disc Couplings

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

Page 14: Highly flexible GKN Stromag Periflex Disc Couplings

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

Page 15: Highly flexible GKN Stromag Periflex Disc Couplings

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.

Page 16: Highly flexible GKN Stromag Periflex Disc Couplings

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

Page 17: Highly flexible GKN Stromag Periflex Disc Couplings

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