26 27 29 30 31...vrme this heavy-duty profile is also primarily designed for protecting high speed...

25

Frontseal®Rubber V-Rings for axial dynamic sealing

Description / Standard seal types 26

Installation and operation 27

Clamping bands & clips 29

Production and Quality assurance / Storage and handling 30

Standard sizes 31

Frontseal®

26

Description

The Frontseal® is an all elastomer axial seal for rotary shafts and bearings. It rotates with the shaft and seals axially against a stationary counterface perpendicular to the shaft. This type of seal has been used widely for several applications and has proved to be reliable and effective against dust, dirt, water and oil splash and other media.

The ring consists of three parts:

- a: the seal body, installed with interference to the shaft;- b: the hinge, acting as a spring connection between the body and the lip;- c: the conical and flexible sealing lip which provides the actual dynamic sealing against the counterface.

The counterface can be the side wall of the bearing, a washer or any housing.

Standard seal types

The Frontseal® is manufactured in different standard profiles:

Other types, modifications or larger diameters available upon request.

VA It’s the most common profile. It has a perpendicular rear face. Wide range of sizes, from 3 to over 2000 [mm] shafts

VS Wide body to ensure higher radial force than VA type. Range of sizes from 5 to 199 [mm] shafts

VL This seal is intended for applications where available space is nar-row. Range of sizes from 110 to over 1200 [mm] shafts

VRME This heavy-duty profile is also primarily designed for protecting high speed bearing arrangements in rolling mills, papermaking and large machine applications. A clamping band can be used to improve axial fixation. Size list available on request

VAX Heavy-duty Frontseal®, primarily designed for large high speed bearing arrangements, used for instance in rolling mills and pa-permaking machine applications. Additionally it can be used as secondary seal for heavy-duty applications where the primary seal has to be protected against water and/or particular contamination. Range of sizes from 200 to over 2000 [mm] shafts

VE It’s a heavy-duty large diameter seal, used for instance in steel milIs, paper milIs and rolling milIs as a dirt/water excluder seal. A clamping band can be used to improve axial fixation (see instruction IL03-02 and page 29). Range of sizes from 300 to over 2000 [mm] shafts

VLX This seal is more compact than VL type, commonly used in confi-ned spaces. Size list available on request

bc a

Frontseal®

27

Installation and operation

Fitting

Fitting a Frontseal® is very simple. The ring must be slightly stretched and pushed along the shaft. It can either be done manually or with a simple tool, in a way that the distance to the counterface can be maintained constant over the circumference using little pressure. The lip of the Frontseal® should be lubricated with a thin film of grease or silicone oil. In case where friction must be reduced, coat the counterface with a low friction agent and do not apply grease to the lip. The shaft should be preferably dry and free from oil and grease.

Frontseal® not preloaded

oval and/or eccentrically turning shaft

Frontseal® fitted with preloading using a tool

tilted counterface

Eccentricity / Misalignment

The V-shape of the Frontseal® provides an effective and reliable sealing even with oval section, shaft run-out, eccentricity or shaft misalignment. Sealing is not even affected by a slightly tilted counterface (maximum permissible flatness deviation is usually defined as 0.4 [mm] per 100 [mm]).

H1H

Frontseal®

28

Installation and operation

Counterface

The type of counterface finish is very important for an efficient sealing and for useful life of the seal. The surface must be smooth, free of scratches and sharp peaks. The choice of surface finish depends on the medium that has to be sealed and on the shaft speed. The choice of counterface materials is highly dependant on the medium too. For normal operating conditions, conventional mild steel of min 125 HB is sufficient. With an increase in speed and the presence of abrasive particles, the hardness of the counterface must also be increased. Surface treatment is suggested for water splashes or other corrosive media.

Peripheral speed

Due to the influence of the centrifugal force, the contact pressure of the lip decreases with increased speed.At peripheral speed up to 8 [m/s] the lip of the Frontseal® has a good pressure against the counterface and it has the function of a light contact seal.Over 8 [m/s] the seal must be axially supported and above 12 [m/s] radial retention is necessary, mounting the Frontseal® in an axial groove or applying an adequate support.

Frontseal®

29

Clamping bands & clips for Frontseal®

Type-VE in AISI430

When the Frontseal® is fitted on the shaft, the body of the ring is subject to a centrifugal force and can move from the shaft. For this reason the Frontseal® requires radial retention that can be supported by a clamping band.

Short description of technical features

The multi-range clamping bands are ideal for use in many different applications with a high mechanical load. With its tensile strength and the even tension force distribution it sets standards for reliable clamping. The clamping band perfectly fits on the VE Frontseal® and ensures an optimal tightness.

The clamping band has a width of 12 [mm] and a thickness of 0.8 [mm], perfectly fitting into the groove of DICHTA® Frontseal® Type VE which is 13 [mm] on all diameters. Both the clamping band and its clip are delivered in stainless steel AISI 430 (1.4016) material. Corrosion resistance in salt spray testing: min. 200 [h].

Clamping bands and supports for Frontseals® type VA are also available

Frontseal®

30

Production and Quality assurance

Storage and handling

Our Frontseal® is manufactured according to Quality Assurance Standards ISO 9001. All production phases are checked and all measurements are recorded and stored for tracing.

Our Frontseal® is individually inspected to ensure that sealing edge and sealing band are free from faults. Small cracks and shortcomings which could cause a split during installation or operation of the seal are also not accepted.

Some storage precautions must be taken in order to avoid deterioration of the material. Frontseal® should be stored in a dust free and dry atmosphere and must be kept in its original packaging which should only be opened just before installation. Samples should be repacked after inspection.Do not drop Frontseal® on shelves or boxes, nor hang seals on hooks, wires or nails, since in either case the seal can be damaged.Seals should be stored on a first-in first-out basis to avoid ageing on the shelf. Avoid storage near sources of heat or near electrical equipment that may generate ozone. Also keep away from direct sunlight.Avoid unnecessary pressure on the lip during storage.

sealing band

sealing edge

d2

C d1

H1

Dd

H

h

Frontseal®

31

Standard sizes

Frontseal® VA

Ref.Shaft diameter [mm] Ring dimensions [mm] Mounting dimensions [mm]

C d d2 d1 H1D h H

VAVAVAVAVA

34567

2,73,54,55,56,5

-----

3,54,55,56,58

2,53,2456

5,57,289

10

2,12,42,42,42,4

33,73,73,73,7

C + 1C + 1C + 1C + 1C + 1

C +C +C +C +C +

46666

2,53333

±±±±±

0,30,40,40,40,4

VAVAVAVAVA

810121416

89,5

11,513,515,5

-----

9,511,513,515,517,5

79

10,512,514

111516,518,520

2,43,43,43,43,4

3,75,55,55,55,5

C + 1C + 2C + 2C + 2C + 2

C +C +C +C +C +

69999

34,54,54,54,5

±±±±±

0,40,60,60,60,6

VAVAVAVAVA

1820222528

17,519212427

-----

1921242729

1618202225

2226283033

3,44,74,74,74,7

5,57,57,57,57,5

C + 2C + 2C + 2C + 2C + 3

C +C +C +C +C +

912121212

4,56666

±±±±±

0,60,80,80,80,8

VAVAVAVAVA

3032353840

2931333638

-----

3133363843

2729313436

3537394246

4,74,74,74,75,5

7,57,57,57,59

C + 3C + 3C + 3C + 3C + 3

C +C +C +C +C +

1212121215

66667

±±±±±

0,80,80,80,81

VAVAVAVAVA

4550556065

4348535863

-----

4853586368

4045495458

5055596468

5,55,55,55,55,5

99999

C + 3C + 3C + 3C + 3C + 3

C +C +C +C +C +

1515151515

77777

±±±±±

11111

VAVAVAVAVA

7075808590

6873788388

-----

7378838893

6367727681

7579848893

6,86,86,86,86,8

1111111111

C + 4C + 4C + 4C + 4C + 4

C +C +C +C +C +

1818181818

99999

±±±±±

1,21,21,21,21,2

VAVAVAVAVA

95100110120130

9398

105115125

-----

98105115125135

859099

108117

97102113122131

6,86,87,97,97,9

111112,812,812,8

C + 4C + 4C + 4C + 4C + 4

C +C +C +C +C +

1818212121

99

10,510,510,5

±±±±±

1,21,21,51,51,5

VAVAVAVAVA

140150160170180

135145155165175

-----

145155165175185

126135144153162

140149160169178

7,97,9999

12,812,814,514,514,5

C + 4C + 4C + 5C + 5C + 5

C +C +C +C +C +

2121242424

10,510,5121212

±±±±±

1,51,51,81,81,8

VAVA

190199

185195

--

195210

171180

187196

99

14,514,5

C + 5C + 5

C +C +

2424

1212

±±

1,81,8

Frontseal®

32

Standard sizes

Frontseal® VA

Over 2000 [mm] available on request


C d d2 d1 H1D h H

VAVAVAVAVA

200220250275300

190210235265290

-----

210235265290310

180198225247270

210228255277300

14,314,314,314,314,3

2525252525

C + 10C + 10C + 10C + 10C + 10

C +C +C +C +C +

4545454545

2020202020

±±±±±

44444

VAVAVAVAVA

325350375400450

310335365390430

-----

335365390430480

292315337360405

322345367390435

14,314,314,314,314,3

2525252525

C + 10C + 10C + 10C + 10C + 10

C +C +C +C +C +

4545454545

2020202020

±±±±±

44444

VAVAVAVAVA

500550600650700

480530580630665

-----

530580630665705

450495540600630

480525570630660

14,314,314,314,314,3

2525252525

C + 10C + 10C + 10C + 10C + 10

C +C +C +C +C +

4545454545

2020202020

±±±±±

44444

VAVAVAVAVA

725750800850900

705745785830875

-----

745785830875920

670705745785825

700735775815855

14,314,314,314,314,3

2525252525

C + 10C + 10C + 10C + 10C + 10

C +C +C +C +C +

4545454545

2020202020

±±±±±

44444

VAVAVAVAVA

9501000105011001150

920965

101510651115

-----

9651015106511151165

865910955

10001045

895940985

10301075

14,314,314,314,314,3

2525252525

C + 10C + 10C + 10C + 10C + 10

C +C +C +C +C +

4545454545

2020202020

±±±±±

44444

VAVAVAVAVA

12001250130013501400

11651215127013201370

-----

12151270132013701420

10901135118012251270

11201165121012551300

14,314,314,314,314,3

2525252525

C + 10C + 10C + 10C + 10C + 10

C +C +C +C +C +

4545454545

2020202020

±±±±±

44444

VAVAVAVAVA

14501500155016001650

14201470152015701620

-----

14701520157016201670

13151360140514501495

13451390143514801525

14,314,314,314,314,3

2525252525

C + 10C + 10C + 10C + 10C + 10

C +C +C +C +C +

4545454545

2020202020

±±±±±

44444

VAVAVAVAVA

17001750180018501900

16701720177018201870

-----

17201770182018701920

15401585163016751720

15701615166017051750

14,314,314,314,314,3

2525252525

C + 10C + 10C + 10C + 10C + 10

C +C +C +C +C +

4545454545

2020202020

±±±±±

44444

VAVA

19502000

19201970

--

19702020

17651810

17951840

14,314,3

2525

C + 10C + 10

C +C +

4545

2020

±±

44

d2

C d1

H1

Dd

H

h

Frontseal®

33

Standard sizes

Frontseal® VS


C d d2 d1 H1D h H

VSVSVSVSVS

5678

10

4,55,56,589,5

-----

5,56,589,5

11,5

45679

89

101115

3,93,93,93,95,6

5,25,25,25,27,7

C + 1C + 1C + 1C + 1C + 2

C +C +C +C +C +

66669

4,54,54,54,56,7

±±±±±

0,40,40,40,40,6

VSVSVSVSVS

1214161820

11,513,515,517,519

-----

13,515,517,51921

10,512,5141618

16,518,5202226

5,65,65,65,67,9

7,77,77,77,7

10,5

C + 2C + 2C + 2C + 2C + 2

C +C +C +C +C +

9999

12

6,76,76,76,79

±±±±±

0,60,60,60,60,8

VSVSVSVSVS

2225283032

2124272931

-----

2427293133

2022252729

2830333537

7,97,97,97,97,9

10,510,510,510,510,5

C + 2C + 2C + 3C + 3C + 3

C +C +C +C +C +

1212121212

99999

±±±±±

0,80,80,80,80,8

VSVSVSVSVS

3538404550

3336384348

-----

3638434853

3134364045

3942465055

7,97,99,59,59,5

10,510,5131313

C + 3C + 3C + 3C + 3C + 3

C +C +C +C +C +

1212151515

99

111111

±±±±±

0,80,8111

VSVSVSVSVS

5560657075

5358636873

-----

5863687378

4954586367

5964687579

9,59,59,5

11,311,3

13131315,515,5

C + 3C + 3C + 3C + 4C + 4

C +C +C +C +C +

1515151818

11111113,513,5

±±±±±

1111,21,2

VSVSVSVSVS

80859095

100

7883889398

-----

83889398

105

7276818590

84889397

102

11,311,311,311,311,3

15,515,515,515,515,5

C + 4C + 4C + 4C + 4C + 4

C +C +C +C +C +

1818181818

13,513,513,513,513,5

±±±±±

1,21,21,21,21,2

VSVSVSVSVS

110120130140150

105115125135145

-----

115125135145155

99108117126135

113122131140149

13,113,113,113,113,1

1818181818

C + 4C + 4C + 4C + 4C + 4

C +C +C +C +C +

2121212121

15,515,515,515,515,5

±±±±±

1,51,51,51,51,5

VSVSVSVSVS

160170180190199

155165175185195

-----

165175185195210

144153162171180

160169178187196

1515151515

20,520,520,520,520,5

C + 5C + 5C + 5C + 5C + 5

C +C +C +C +C +

2424242424

1818181818

±±±±±

1,81,81,81,81,8

d2

C d1

H1

d D

h

H

Frontseal®

34

Standard sizes

Frontseal® VL

Reference Shaft diameter [mm] d [mm]

VL 110 105 - 115 99VL 120 115 - 125 108VL 130 125 - 135 117VLVLVLVLVL

140150160170180

135145155165175

-----

145155165175185

126135144153162

VLVLVLVLVL

190200220250275

185195210233260

-----

195210233260285

171182198225247

VLVLVLVLVL

300325350375400

285310335365385

-----

310335365385410

270292315337360

VLVLVLVL

425450500525

410440475510

----

440475510540

382405450472

VL 550 540 - 565 495VL 575 565 - 585 517VL 600 585 - 625 540VL 650 625 - 675 600VL 700 675 - 710 630VL 725 710 - 740 670VL 750 740 - 775 705VL 800 775 - 825 745VL 850 825 - 875 785VL 900 875 - 925 825VL 950 925 - 975 865VL 1000 975 - 1025 910VL 1050 1025 - 1075 955VLVL

11001150

10751125

--

11251175

10001045

VL 1200 1175 - 1225 1090


d2

C d1

H1

d

H

h

WW

Ring dimensions Assembling dimensionsH = 10,5 [mm] H1 = 8 +/- 1,5 [mm]h = 6,0 [mm] d2 max = C + 5 [mm]W = 6,5 [mm] d1 min = C + 20 [mm]

Frontseal®

35

Standard sizes

Frontseal® VE


VE 300 300 - 305 294VE 305 305 - 310 299VE 310 310 - 315 304VE 315 315 - 320 309VE 320 320 - 325 314VE 325 325 - 330 319VE 330 330 - 335 323VE 335 335 - 340 328VE 340 340 - 345 333VE 345 345 - 350 338VE 350 350 - 355 343VE 355 355 - 360 347VE 360 360 - 365 352VE 365 365 - 370 357VE 370 370 - 375 362VE 375 375 - 380 367VE 380 380 - 385 371VE 385 385 - 390 376VE 390 390 - 395 381VE 395 395 - 400 386VE 400 400 - 405 391VE 405 405 - 410 396VE 410 410 - 415 401VE 415 415 - 420 405VE 420 420 - 425 410VE 425 425 - 430 415VE 430 430 - 435 420VE 435 435 - 440 425VE 440 440 - 445 429VE 445 445 - 450 434VEVEVEVEVE

450455460465470

450455460465470

-----

455460465470475

439444448453458

VEVEVEVEVE

475480485490495

475480485490495

-----

480485490495500

463468473478483

VEVEVEVEVE

500505510515520

500505510515520

-----

505510515520525

488493497502507

d1H1

Cd2

h

H

Wd

Ring dimensions Assembling dimensionsH = 65 [mm] H1 = 50 +/- 12 [mm]h = 32 [mm] d2 max = C + 24 [mm]W = 30 [mm] d1 min = C + 115 [mm]

H1

h

H d1

d2

d

C

W

Frontseal®

36

Standard sizes

Frontseal® VE


VEVEVEVEVE

940950960970980

933944955966977

-----

944955966977988

900911921932942

VEVEVEVEVE

9901000102010401060

988999

101010251045

-----

9991010102510451065

953963973990

1008VEVEVEVEVE

10801100112011401160

10651085110511251145

-----

10851105112511451165

10271045106510841103

VEVEVEVEVE

11801200122012401260

11651185120512251245

-----

11851205122512451270

11211139115711761195

VEVEVEVEVE

12801300132513501375

12701295131513401365

-----

12951315134013651390

12181240125912811305

VEVEVEVEVE

14001425145014751500

13901415144014651490

-----

14151440146514901515

13281350137413971419

VEVEVEVEVE

15251550157516001650

15151540157016001640

-----

15401570160016401680

14431467149515241559

VEVEVEVEVE

17001750180018501900

16801720176518101855

-----

17201765181018551905

15961632167117141753

VEVE

19502000

19051955

--

19552010

17941844


VEVEVEVEVE

525530535540545

525530535540545

-----

530535540545550

512517521526531

VEVEVEVEVE

550555560565570

550555560565570

-----

555560565570575

536541546550555

VEVEVEVEVE

575580585590600

575580585590600

-----

580585590600610

560565570575582

VEVEVEVEVE

610620630640650

610620630640650

-----

620630640650660

592602612621631

VEVEVEVEVE

660670680690700

660670680690700

-----

670680690700710

640650660670680

VEVEVEVEVE

710720730740750

710720730740750

-----

720730740750758

689699709718728

VEVEVEVEVE

760770780790800

758766774783792

-----

766774783792801

735743751759768

VEVE

810820

801810

--

810821

777786

VEVEVEVEVE

830840850860870

821831841851861

-----

831841851861871

796805814824833

VEVEVEVEVE

880890900920930

871882892912922

-----

882892912922933

843853871880890


d1H1

Cd2

h

H

Wd H1

h

H d1

d2

d

C

W

Ring dimensions Assembling dimensionsH = 65 [mm] H1 = 50 +/- 12 [mm]h = 32 [mm] d2 max = C + 24 [mm]W = 30 [mm] d1 min = C + 115 [mm]

Frontseal®

37

Standard sizes

Frontseal® VAX



VAXVAXVAXVAXVAX

200205210215220

200205210215219

-----

205210215219224

192196200204207

VAXVAXVAXVAXVAX

225230235240250

224228232236240

-----

228232236240250

211215219223227

VAXVAXVAXVAXVAX

260270280290300

250260270281292

-----

260270281292303

236245255265275

VAXVAXVAXVAXVAX

310320330340350

303313325335345

-----

313325335345355

285295305315322

VAXVAXVAXVAXVAX

360380400425450

355372390415443

-----

372390415443480

328344360385410

VAXVAXVAXVAXVAX

500550600650700

480530580630665

-----

530580630665705

450495540600630


VAXVAXVAXVAXVAX

725750800850900

705745785830875

-----

745785830875920

670705745785825

VAXVAXVAXVAXVAX

9501000105011001150

920965

101510651115

-----

9651015106511151165

865910955

10001045

VAXVAXVAXVAXVAX

12001250130013501400

11651215127013201370

-----

12151270132013701420

10901135118012251270

VAXVAXVAXVAXVAX

14501500155016001650

14201470152015701620

-----

14701520157016201670

13151360140514501495

VAXVAXVAXVAXVAX

17001750180018501900

16701720177018201870

-----

17201770182018701920

15401585163016751720

VAXVAX

19502000

19201970

--

19702020

17651810

d1H1

Cd2

h

H

Wd H1

h

H

d1

d2

d

C

W

Ring dimensions Assembling dimensionsH = 31 [mm] H1 = 25 +/- 5 [mm]h = 17,3 [mm] d2 max = C + 12 [mm]W = 17,8 [mm] d1 min = C + 50 [mm]

26 27 29 30 31...vrme this heavy-duty profile is also primarily designed for protecting high speed...

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