Available in split and non-split versions. The fully

split version enables complete dismounting and

mounting without shaft or propeller removal.

The seal complies with the classification

requirements for 10-15 years interval between shaft

surveys.

All Cedervall sterntube seals are equipped with a

“free-floating” alignment ring. An inner ropeguard

mounted on the rotating alignment ring housing is

available as an optional extra. It protects the seal from

foreign objects such as fishing lines, ropes, wires etc.

that may become entangled in the propeller.

The SeaQual concept, has a revolutionary new feature;

the built in pressure equalizer. SeaQual is the first

sterntube seal, ever, with this kind of device. The pressure

equalizer compensates for the pressure variations that

normally occur in the sterntube.

Cedervall seals have always been designed to tolerate

axial and radial shaft movements normally experienced in

the shaft line. Now, with the SeaQual, we can also accept

and com-pensate pressure pulses that occur. The ability to

ensure that the sterntube is pressurised only by static

pressure from the gravity tank, provides an excellent and

trouble free operation.

SeaQual is equipped with separate sealing faces.

This enables easy mounting and dismounting of

spare parts.

Separate free-floating sealing faces

provide great benefits to the face-to-

face seal principle. Besides acting as

stator the white metal face functions as

a working surface for the newly

developed X-ring. This means that two

sealing surfaces have been combined into

one component, thus reducing the number of

spare parts.

The SeaQual can be made in a fully split execution, which enables

complete dismounting and mounting without shaft or propeller

removal.

The conclusion is that SeaQual represents a lifetime guarantee

against undesired shaft removals.

Revolutionary SeaQual concept

Aft sterntube seals

Sterntube bearings

Complete Sterntubes

Made of cast iron or steel with lead or tin based (lead standard) centrifugally cast white metal.

Cedervall design features safe and easy mounting. Offered for any shaft diameter and length, having white metal bearings and temperature sensors (optional) pre-mounted.

Bulkhead sealsThe Cedervall bulkhead seal type CBS is an emergency seal that is normally not operating but is engaged automatically in case water appears at either side of a bulkhead, preventing flooding of adjacent compartments.

Intermediate thrust bearingsThe Cedervall Intermediate Thrust Bering is designed as a single collar thrust bearing, specially reinforced to taking the thrust in ahead as well as in astearn direction. The bearing consists of two faces of tilting pads on pivots to transmit the thrust from the shafting to

Intermediate shaft bearingsCedervall intermediate shaft bearings are of self-aligning type, able to compensate for possible misalignment in the shaftline. The bearings are, as standard, prepared for water-cooling and equipped with local thermometer and oil level dipstick.

Hydraulic couplingsTwo standard executions available, flanged- or straight couplings for mounting on cylindrical shafts. The coupling is mounted on a tapered sleeve using high pressure pumps (optional) .

Cedervall forward stern-tube seals are available in fully split, semi-split or non-split versions. All types are fitted with an external cooling system and are available for any shaft diameter.

Forward stern-tube seals

www.cedervall.com

GeneralThe SQA aft seal is a split oil lubricated face seal for propeller shafts. The face seal principle offers a durable solution, suitable for the harsh working conditions of pro-peller shaft seals.

ExecutionSQA is available in two versions, split and retrofit version, for shaft diameters ranging from 205 to 1004 mm. Both versions comply with requirements for 15 years propeller shaft survey.The exploded view on next page represents the retrofit version where all parts are split to enable installation without removal of the propeller, propeller shaft or rudder. In the split version parts 1, 4 and 7 are manufactured undivided.The materials chosen for SeaQual are selected to achieve maximum performance throughout the entire life of the vessel. SeaQual can also be manufactured to comply with the IWS (in water survey) rules. The IWS version enables measureing of bearing status without drydock the vessel.

Optional itemsSQA can be equipped with an inner rope guard, which provides an extra protection against ropes and fishing nylon.

Standard ratingsShaft diameter: 205-1004 mmPeriphery speed: max 10 m/sLubricant: oil (see recommendation)Oil pressure: max 2.5 BarPressure gradient: 0.1-0.3 BarOperating temperature: -5 ºC to 65 ºCShaft elongation: max 10 mm

MaintenanceSQA is designed for maintenance intervals of five years, which represents the normal period between docking.At scheduled maintenance, parts marked with (1) in the part list are replaced. This type of maintenance does not require removal of the propeller, propeller shaft or rudder.The split design makes it possible to carry out emergency repairs in water.

SQA split oil lubricated aft sterntube seal

Partlist 1 Stator housing Red brass 2 Bellows gland Red brass 3 Bellows gland Red brass 4 Support ring Red brass 5 Stator (1) Red brass/white metal 6 Rotor (1) Acid proof steel 7 Rotor housing Red brass 8 Stator cover Red brass 9 Packing ring Red brass10 Inner rope guard (2) Red brass11 Screw / Lock washer (2) Acid proof steel12 Gasket Fibre glass13 Screw, flange Acid proof steel14 Gasket Fibre glass15 Screw, flange Acid proof steel16 Pressure spring (1) Acid proof steel17 Bellows (1) Vamac18 X-ring (1) Nitrile rubber19 O-ring (1) Nitrile rubber20 O-ring (1) Nitrile rubber21 O-ring (1) Silicone rubber22 O-ring (1) Nitrile rubber23 Wear down gauge

113

12

2

17

3

4

20

5

6

2122

7

14

15

10

9

18

8 2319

16

11

NotesDimension table above represents basic version of SeaQual. Rotor housing is available in various executions adapted to specific propeller types. If fastening configuration or build in measure does not apply, contact Cedervall in Sweden for consultation.

SQA

We reserve the right to change dimensions without prior notice.Notes: (1) Spare part. (2) Optional item

Size D - D1 B, B2 B1, B3 C2 U, U17 205 - 228 442 414 170 8 x M128 229 - 246 460 432 170 8 x M129 247 - 264 478 450 170 8 x M1210 265 - 283 510 475 170 8 x M1611 284 - 302 530 495 170 8 x M1612 303 - 321 565 525 185 8 x M2013 322 - 339 580 540 185 8 x M2014 340 - 358 600 560 185 10 x M2015 359 - 377 620 580 185 10 x M2016 378 - 396 640 600 185 10 x M2017 397 - 415 655 615 185 10 x M2018 416 - 432 675 635 185 10 x M2019 433 - 451 695 655 185 10 x M2020 452 - 470 715 675 190 12 x M2021 471 - 491 735 695 190 12 x M2022 492 - 510 755 715 190 12 x M2023 511 - 535 780 740 190 12 x M2024 536 - 554 800 760 190 12 x M2025 555 - 573 820 780 190 12 x M2026 574 - 592 840 800 195 12 x M2027 593 - 611 860 820 195 12 x M2028 612 - 630 875 835 195 12 x M2029 631 - 649 895 855 195 12 x M2030 650 - 668 915 875 195 12 x M2031 669 - 687 935 895 195 16 x M2032 688 - 706 955 915 195 16 x M2033 707 - 734 1010 970 -- 16 x M2034 735 - 764 1060 1015 -- 16 x M2435 765 - 794 1090 1045 -- 16 x M2436 795 - 824 1120 1075 -- 16 x M2437 825 - 854 1150 1105 -- 16 x M2438 855 - 884 1180 1135 -- 16 x M2439 885 - 914 1210 1165 -- 16 x M2440 915 - 944 1240 1195 -- 18 x M2441 945 - 974 1270 1225 -- 18 x M2442 975 - 1004 1300 1255 -- 18 x M24

www.cedervall.com

SQL non-split oil lubricated aft seal

GeneralThe SQL seal is a non-split oil lubricated face seal for propeller shafts. The face seal principle offers a durable solution, suitable for the harsh working conditions of propeller shaft seals

ExecutionSQL is designed using the experience of the well known SQA for diameters ranging from 205mm to 1004mm, complying with requirements for 15 years propeller survey. The exploded view on next page shows all parts.The materials chosen for SeaQual are selected to achieve maximum performance throughout the entire life of the vessel. To allow measuring of bearing status under water an IWS device is used. The SQL design measurements are identical to the split SQA allowing later upgrading.

Optional itemsSQL can be equipped with an inner rope guard, which provides extra protection against ropes and fishing nylon.

Standard ratingsShaft diameter: 205-1004 mmPeriphery speed: max 10 m/sLubricant: oil (see recommendation)Oil pressure: max 2.5 BarPressure gradient: 0.1-0.3 BarOperating temperature: -5 ºC to 65 ºCShaft elongation: max 10 mm

MaintenanceSQL is designed for maintenance intervals of five years, which represents the normal period between docking.At scheduled maintenance, parts marked with (1) in the part list are replaced.

SQL

20

721

12

1819

6

11

5

3

10

2

8

134

16

2515

24

Partlist 1 Stator housing Red brass 2 Bellows gland Red brass 3 Bellows gland Red brass 5 Stator (1) Acid proof steel 6 Rotor (1) Red brass/white metal 7 Rotor housing Red brass 8 Stator cover Red brass10 Bellows (1) Vamac11 O-ring (1) Nitrile rubber12 Inner rope guard (2) Red brass15 Spring set (1) Acid proof steel16 O-ring (1) Nitrile rubber18 O-ring (1) Nitrile rubber19 O-ring (1) Silicone rubber20 Gasket Fibre glass21 Screw Acid proof steel24 Gasket Fibre glass25 Screw Acid proof steel34 Wear down gauge Steel

NotesThe dimension table above represents the basic version of SQL. The rotor housing is available in various executions adapted to specific propeller types. If fastening configuration or build in measure does not apply, contact Cedervall in Sweden for consultation.

Size D - D1 B, B2 B1, B3 C2 U, U17 205 - 228 442 414 170 8 x M128 229 - 246 460 432 170 8 x M129 247 - 264 478 450 170 8 x M1210 265 - 283 510 475 170 8 x M1611 284 - 302 530 495 170 8 x M1612 303 - 321 565 525 185 8 x M2013 322 - 339 580 540 185 8 x M2014 340 - 358 600 560 185 10 x M2015 359 - 377 620 580 185 10 x M2016 378 - 396 640 600 185 10 x M2017 397 - 415 655 615 185 10 x M2018 416 - 432 675 635 185 10 x M2019 433 - 451 695 655 185 10 x M2020 452 - 470 715 675 190 12 x M2021 471 - 491 735 695 190 12 x M2022 492 - 510 755 715 190 12 x M2023 511 - 535 780 740 190 12 x M2024 536 - 554 800 760 190 12 x M2025 555 - 573 820 780 190 12 x M2026 574 - 592 840 800 195 12 x M2027 593 - 611 860 820 195 12 x M2028 612 - 630 875 835 195 12 x M2029 631 - 649 895 855 195 12 x M2030 650 - 668 915 875 195 12 x M2031 669 - 687 935 895 195 16 x M2032 688 - 706 955 915 195 16 x M2033 707 - 734 1010 970 -- 16 x M2034 735 - 764 1060 1015 -- 16 x M2435 765 - 794 1090 1045 -- 16 x M2436 795 - 824 1120 1075 -- 16 x M2437 825 - 854 1150 1105 -- 16 x M2438 855 - 884 1180 1135 -- 16 x M2439 885 - 914 1210 1165 -- 16 x M2440 915 - 944 1240 1195 -- 18 x M2441 945 - 974 1270 1225 -- 18 x M2442 975 - 1004 1300 1255 -- 18 x M24

We reserve the right to change dimensions without prior notice.Notes: (1) Spare part. (2) Optional item

www.cedervall.com

SQF split oil lubricated forward sterntube seal

GeneralThe SQF forward seal is a split oil lubricated face seal for propeller shafts. The face seal principle offers a durable solution, suitable for the harsh working conditions of propeller shaft seals.

ExecutionSQF is available in two versions split and retrofit version for shaft diameters ranging from 205 to 1200 mm. Both versions comply with requirements for 15 years propeller shaft survey. The exploded view on next page represents the retrofit version where all parts are split to enable installation without removal of the propeller, propeller shaft or rudder. In the split version parts 1 and 7 are manu-factured undivided. Materials for SeaQual are selected to achieve maximum performance throughout the entire life of the vessel.

Optional itemsSQF is equipped with a standard PT-100 sensor for monitoring of the operating temperature.

Standard ratingsShaft diameter: 205-1004 mmPeriphery speed: max 10 m/sLubricant: oil (see recommendation)Oil pressure: max 2.5 BarOperating temperature: -5 ºC to 65 ºCShaft elongation: max 10 mmCooling: coolant WaterPressure: max 5 BarFlow: min 20 l/minInlet temperature: max 38ºC

MaintenanceSeaQual is designed for maintenance intervals of five years, which represents a normal period between docking.At scheduled maintenance, parts marked with (1) in the part list are replaced. This type of maintenance does not require removal of the propeller, propeller shaft or rudder.

Partlist 1 Stator housing Red brass 2 Bellows gland Red brass 3 Bellows gland Red brass 5 Stator (1) Red brass / White metal 6 Rotor (1) Cast iron 7 Rotor housing Red brass 8 Stator cover Red brass 9 Driving strap Red brass10 Bellows (1) Nitrile rubber11 Pressure spring (1) Acid proof steel12 O-ring (1) Nitrile rubber13 O-ring (1) Nitrile rubberl14 O-ring (1) Nitrile rubber15 Screw Steel16 Gasket Fibre glass17 Screw, flange Acid proof steel18 Temperature sensor Steel

14

13

7

6

5

18

3

10

2

11

12

8

1

16

17

9

15

SQF

We reserve the right to change dimensions without prior notice.Notes: (1) Spare part.

Size D - D1 B B C2 U7 205 - 228 442 414 261 8 x M128 229 - 246 460 432 261 8 x M129 247 - 264 478 450 261 8 x M1210 265 - 283 510 475 261 8 x M1611 284 - 302 530 495 261 8 x M1612 303 - 321 565 525 268 8 x M2013 322 - 339 580 540 268 8 x M2014 340 - 358 600 560 268 10 x M2015 359 - 377 620 580 268 10 x M2016 378 - 396 640 600 268 10 x M2017 397 - 415 655 615 268 10 x M2018 416 - 432 675 635 268 10 x M2019 433 - 451 695 655 268 10 x M2020 452 - 470 715 675 272 12 x M2021 471 - 491 735 695 272 12 x M2022 492 - 510 755 715 272 12 x M2023 511 - 535 780 740 272 12 x M2024 536 - 554 800 760 272 12 x M2025 555 - 573 820 780 272 12 x M2026 574 - 592 840 800 277 12 x M2027 593 - 611 860 820 277 12 x M2028 612 - 630 875 835 277 12 x M2029 631 - 649 895 855 277 12 x M2030 650 - 668 915 875 277 12 x M2031 669 - 687 935 895 277 16 x M2032 688 - 706 955 915 277 16 x M2033 707 - 734 1010 970 -- 16 x M2034 735 - 764 1060 1015 -- 16 x M2435 765 - 794 1090 1045 -- 16 x M2436 795 - 824 1120 1075 -- 16 x M2437 825 - 854 1150 1105 -- 16 x M2438 855 - 884 1180 1135 -- 16 x M2439 885 - 914 1210 1165 -- 16 x M2440 915 - 944 1240 1195 -- 18 x M2441 945 - 974 1270 1225 -- 18 x M2442 975 - 1004 1300 1255 -- 18 x M24

www.cedervall.com

MDL non-split oil lubricated forward sterntube seal

GeneralThe MDL forward seal is a non-split oil lubricated face seal for propeller shafts. The seal is equipped with a liquid cooled “free-floating” alignment ring made of cast iron, and with spherical driving pins that reduces the risk for wedging of the seal ring and also reduces the wear from the packing. The MDL type seal together with our aft split type seals complies with the classification requirements for 15 years propeller shaft survey.

Standard ratingsShaft diameter: 66-1029 mmPeriphery speed: max 10 m/sLubricant: oil (see recommendation)Oil pressure: max 2.5 BarOperating temperature: -5 ºC to 65 ºCShaft elongation: max 10 mmCooling: coolant WaterPressure: max 5 BarFlow: min 20 l/minInlet temperature: max 38ºC

All dimensions in mm.

Each seal suits shaft diameters between D and D above!1

Partlist 1 Seal ring housing 2 Seal ring 3 Packing ring 4 Driving pin 5 Assembly screw 6 Screw plug 7 Pressure spring 8 Packing 9 O-ring10 Packing screw with lock washer11 Strap in halves12 Screw with nut for strap13 Alignment ring14 Alignment ring housing15 Hose connection16 O-ring outer17 O-ring bottom19 Location pin20 Location pin with hole for temp ind.21 Gasket (1)22 Bolt (1)23 Rubber hose (1)24 Hose clip (1)

3

4

11

12

8

5635

9

10

2

15

13

19

16

17

20

15

14

7

1

MDL

We reserve the right to change dimensions without prior notice.Notes: Items marked (1) is not shown in exploded view.

Size D - D1 B B1 C3 U02 66 - 78 237 217 215 6 x M1001 79 - 91 250 230 215 6 x M101 92 - 104 267 245 215 8 x M102 105 - 132 279 257 215 8 x M103 117 - 132 295 273 215 8 x M104 133 - 151 314 292 215 8 x M105 152 - 170 333 311 215 8 x M106 171 - 189 358 336 215 8 x M107 190 - 205 400 370 240 12 x M128 206 - 224 437 407 245 12 x M129 225 - 243 456 426 245 12 x M1210 244 - 262 475 445 255 12 x M1211 263 - 278 491 461 255 12 x M1212 279 - 297 514 484 255 12 x M1213 298 - 316 541 511 290 12 x M1214 317 - 335 586 551 300 16 x M1615 336 - 354 605 570 300 16 x M1616 355 - 373 624 589 315 16 x M1617 374 - 392 643 608 315 16 x M1618 393 - 411 662 627 315 16 x M1619 412 - 430 681 646 315 16 x M1620 431 - 449 700 665 330 18 x M1621 450 - 464 719 684 330 18 x M1622 465 - 479 738 703 330 18 x M1623 480 - 494 753 718 330 18 x M1624 495 - 509 768 733 330 20 x M1625 510 - 524 783 748 330 20 x M1626 525 - 539 798 763 330 20 x M1627 540 - 554 810 775 330 20 x M1628 555 - 574 830 795 335 20 x M1629 575 - 594 850 815 335 20 x M1630 595 - 619 870 835 335 24 x M1631 620 - 644 895 880 335 24 x M1632 645 - 669 920 885 335 24 x M1633 670 - 699 995 945 410 16 x M2434 700 - 729 1025 975 410 16 x M2435 730 - 759 1055 1005 410 16 x M2436 760 - 789 1085 1035 410 16 x M2437 790 - 819 1115 1065 420 16 x M2438 820 - 849 1145 1095 420 16 x M2439 850 - 879 1175 1125 420 18 x M2440 880 - 909 1205 1155 420 18 x M2441 910 - 939 1235 1185 420 18 x M2442 940 - 969 1265 1215 420 18 x M2443 970 - 999 1295 1245 420 18 x M2444 1000 - 1029 1325 1275 420 20 x M24

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CWS split water lubricated forward sterntube seal

GeneralThe CWS forward seal has been designed to provide inboard sealing of propeller shafts with water lubricated bearings. It can be used for all sea and river going vessels for either closed or open lubrication systems.

ExecutionThe design allows significant radial shaft displacement caused by wear in the bearing. The static inflatable secondary seal "pnemostop" allows inspection and repair of the seal with the vessel afloat or with water in the sterntube.

CWS is equipped with a split wear insert that makes repair possible without shaft removal. The housing could as option be supplied in a split version. The split housing version minimizes the required free length in front of the seal from about one extra seal length to just a few centimetres longer than the seal itself.The choice of materials makes the seal fully corrosion resistant provided that the cathodic protection of ship hull and shaft earthing is made professionally.

Each seal suits shaft diameters between D and D above!1

All dimensions in mm.

CWS

We reserve the right to change dimensions without prior noticeNotes: (1) Spare part.

Size D - D1 B B1 C3 U6 186 - 204 362 341 243 8 x M107 205 - 228 442 414 284 8 x M128 229 - 246 460 432 284 8 x M129 247 - 264 478 450 284 8 x M1210 265 - 283 510 475 284 8 x M1611 284 - 302 530 495 284 8 x M1612 303 - 321 565 525 284 8 x M2013 322 - 339 580 540 284 8 x M2014 340 - 358 600 560 284 12 x M2015 359 - 377 620 580 284 12 x M2016 378 - 396 640 600 284 12 x M2017 397 - 415 655 615 284 12 x M2018 416 - 432 675 635 284 12 x M2019 433 - 451 695 655 284 12 x M2020 452 - 470 715 675 284 12 x M2021 471 - 491 735 695 284 12 x M2022 492 - 510 755 715 284 12 x M2023 511 - 535 780 740 284 12 x M2024 536 - 554 800 760 284 12 x M2025 555 - 573 820 780 284 12 x M2026 574 - 592 840 800 284 12 x M2027 593 - 611 860 820 284 12 x M20

21

1

22

12

18

13

11

2

10

14

9

15

8

1820

7

5

6

3

19

4

Partlist 1 Pneumostop housing Red brass 2 Housing Red brass 3 Stator housing Red brass 4 Packing gland Acid proof steel 5 Stator support Acid proof steel 6 Seal ring (1) Graphite 7 Seal ring gland Acid proof steel 8 Rotor (1) Acid proof steel 9 Rotor Support Acid proof steel 10 Drivning strap Acid proof steel 11 Pneumostop gland Red brass12 Pneumostop (1) EPDM13 Pneumostop support Red brass14 O-ring (1) Nitrile rubber15 O-ring (1) Silicone rubber18 O-ring (1) Nitrile rubber19 Packing (1) PTFE20 Pressure spring (1) Acid proof steel21 Gasket Fibre glass22 Fastening screw Acid proof steel

www.cedervall.com

Sterntube and whitemetal bearings

GeneralCedervall sterntubes with white metal sterntube bearings together with our world known seals forms a combination, which guaranties trouble free operation throughout the entire life of your vessel.

ExecutionCedervall sterntubes are designed for easy installation and trouble free operation. The most common method for installation is “resin-mounting” using one of the well known brands of epoxy. The standard sterntube has 2 white metal bearings with a PT-100 sensor in the aft bearing according to Class rules and customer requirements. Other types of sterntube designs are available to suite the application with 1 up to 3 bearings. All machining and piping for selected seals is done before delivery to minimize installation time.

Optional itemsThe sterntube/bearings can be machined for different types of temperature sensors as well as for different kinds of lubrication from normal static one to forced or hydrostatic one.

Forward part

Aft part

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Hydraulic couplings

GeneralThe Cedervall hydraulic couplings are designed for easy handling and trouble free operation. They are made of highest quality steel in accordance with existing classification rules and are available in sizes from 100mm and upwards.

ExecutionCedervall standard hydraulic couplings are designed as shown on these pages, several other types for special applications are also available. All types are mounted on cylindrical shafts using tapered sleeves.For connecting two cylindrical shafts the CSR-type is used and for connection to a flange the CSF-type is used. All Cedervall hydraulic flanges are designed to optimize the allowable torque. Installation pressure used is as high as 1200 bar using gearbox oil of ISO VG 100 viscosity.

CSR

OptionalFor hollow bored shafts a reinforcement sleeve may be needed in order to optimize the design. Hydraulic pumps and fittings are delivered upon request. For flanged couplings fitted or hydraulic bolts can be delivered upon request.

CSF

Mounting sequence Hydraulic couplings

Mounting

Dismounting

Mounting

Dismounting

CSFCSR

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self aligning intermediate shaft bearing CEDN type

GeneralThe CEDN self aligning intermediate shaft bearing is made of highest quality cast iron with centrifugally cast lead based white metal bearing surface.

ExecutionThe bearing is self-lubricating and prepared for water-cooling. The self-aligning design simplifies installation and reduces wear of the bearing compared to conventional rigid design. The bearings are equipped with an oil level gauge and a thermometer as standard.

Optional itemsTemperature sensor type PT-100 and water cooler can be installed on the bearings as an option. In case of low shaft speed running conditions, the bearings can be equipped with a hydrostatic lubrication system. The oil is then supplied from a separate pump unit containing an electric driven pump and an oil cooler.

CEDN

We reserve the right to change dimensions without prior notice.Notes: (1) L = bearing length (Pos.3). (2) Item not shown in exploded view. (3) Optional item.

Size D - D1 A B C E F G H J L(*1) M U165 126 - 165 220 350 410 250 320 215 494 85 43 4-ø32210 166 - 210 270 400 460 210 270 340 245 534 105 43 4-ø32235 211 - 240 310 490 550 240 300 370 260 584 125 43 4-ø32265 241 - 274 375 550 610 130 320 403 300 639 135 43 6-ø32290 275 - 300 365 580 640 145 350 433 325 669 160 43 6-ø32320 301 - 332 424 620 690 160 390 473 345 699 165 53 6-ø32350 333 - 365 430 640 700 190 440 523 360 734 185 53 6-ø32380 366 - 400 475 700 760 190 440 523 380 749 200 53 6-ø32420 401 - 432 530 740 800 210 480 563 390 789 220 63 6-ø32450 433 - 465 530 795 855 225 510 602 440 859 235 63 6-ø32480 466 - 500 610 840 930 217,5 525 619 425 864 250 63 6-ø45530 501 - 550 580 880 970 201 492 588 460 886 275 83 6-ø45580 551 - 600 845 965 1065 222,5 545 645 515 1004 320 83 6-ø55630 601 - 650 920 1050 1160 241 592 708 560 1075 352 83 6-ø60680 650 - 700 840 1120 1210 210/170 640 767 625 1207 350 93 8-ø45730 701 - 750 900 1210 1300 217/167,5 642 780 660 1285 375 123 8-ø45780 751 - 825 1000 1380 1500 210 750 886 740 1437 415 153 8-ø45 All dimensions in mm

150

A

B

C

M

U

J

H

G

F

EE

D -

D1

14

12

13

3

5

6

7

8

7

1716

4

6

1

15

11

9

7

8

10

2

7Part list1 Lower body Cast iron2 Upper body Cast iron3 Bearing, split (1) Cast iron / White metal4 Oil scraper Cast aluminum5 Oil ring, split Cast aluminum6 Gasket Fibre glass7 Housing, split Cast iron8 Shaft seals Rubber / 9 Cover10 Thermometer Brass11 Dip stick Steel12 Cooler Copper13 Oil level glass Polyamide14 Drain plug Brass15 Acid proof steel16 Steel17

PTFEPVC glass

Temperature sensor (3)Fastening screw (2), (3)Level screw (2) Steel

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ITB ITB type intermediate thrust bearing

GeneralThe Cedervall Intermediate Thrust Bering is designed as a single collar thrust bearing, specially reinforced for taking the thrust in ahead as well as in astearn direction.

ExecutionThe bearing consists of two faces of tilting pads on pivots to transmit the thrust from the shafting to the bearing housing. The stiffness of the design and the position of the supporting legs minimizes the tilting effect with the benefit of low stress levels. The oil circulating and cooling system is available either as an selflubricating system with integrated cooler or as external pump and cooler unit, with all remote monitoring of temperatures and oil flow installed. Workshop tests confirming design and performance under working conditions up to thrusts well above 1500kN are performed and documentations of these test and approval from Classification societies are delivered with bearing.

OptionsFor small and medium sized applications a cost efficient design is to have the bearing designed to have both radial and axial support. Lubrication can be either standard self lubrication or with an external lubrication unit.

For application with high shaft diameters the bearing is delivered only to take the axial forces and with external lubrication as standard.

ITB

External Lubrication unitAll sizes of Cedervall ITB bearings can be supplied with external lubrication unit.For bigger sizes this is the standard. The unit works as a forced lubrication system and consists of a tank unit with electric pump with cooler and necessary valves etc. Suitable grade of oil for the system is ISO VG100.

Lubrication of the Cedervall intermediate thrust bearing

Typical installation of the Cedervall intermediate thrust bearing

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CBS split mechanical bulkhead seal

General

Execution

The Cedervall bulkhead seal type CBS is an emergency seal that is normally not operating but is engaged automatically in case water appears at either side of a bulkhead, preventing flooding of adjacent compartments.

The CBS consists of two major parts; The housing and the rotor, which are both split as standard. The design of the CBS allows the seal to be placed on either side of a bulkhead since the rotor can work in both directions. During normal operation the rotor is moving with the shaft creating almost no friction/heat. In the case of flooding on either side of the bulkhead, the water pressure automatically engagesthe seal so that the rotor is pressed against the housing preventing water from entering. Although almost no wear occurs under normal circumstances, the inspection and possible maintenance is easily accessible.

OptionsThe flange part of the housing is split and can be designed in different sizes allowing large openings in the bulkhead for the flanges of the shaft.

CBS

We reserve the right to change design and dimensions without prior notice

Normal operation Flooding aft of bulkhead Flooding forward of bulkhead

Face seal

Operation of the Cedervall Bulkhead seal

Typical installation of the Cedervall Bulkhead seal

Installation aft of the bulkhead Installation fwd. of the bulkhead

Bulkhead

Housing

Rotor

Shaft

O-ring

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RETROFIT “The first step towards savings”

every day. It is obvious how the split design of the Cedervall SeaQual seal brings along major benefits

for ship-owners and that is met with open arms.

The fully split Cedervall sterntube seal allows the vessel to avoid shaft

withdrawal during dry docking as well as the following work of rudder

dismounting and propeller disassembly. This will not only save time in the

dry dock but also costs in the shape of off-hire time, goods handling,

delays etc. Certainly any type and make of seal can easily be exchanged,

not only improving the quality of the sterntube seal but also guaranteeing a

simple and efficient service job.

The existing seal, normally broken down, will be removed by simply cutting it out. This is another result

of the fact that a shaft withdrawal is not necessary.

The Cedervall sterntube seal will then already be at the yard, waiting to be checked, cleaned and

mounted. A simple step by step program is carried out by the authorized Cedervall service engineer to

ensure the quality of the mounting and

the guarantees.

As happy customers spread the news, the extended Cedervall retrofit program is gaining customers

“The technical solution of the new SeaQual split face type seal eliminates a chrome steel liner and vulnerable rubber lip seals” says Mr Eugen Adami, Managing Director of Mastermind Ship Management, Cyprus.

“ The excellent technical support and knowledge of the Cedervall company, is another reason for us to choose Cedervall SeaQual not only for newbuildings but also as retrofit on our existing vessels adds Mr. Adami.”

Our service organization is well-developed and we have the recourses to do a job anywhere in the

world. Engineers may be sent from Göteborg or from any of the

service agents we use in many international ports. We are proud

to say that vessels on normal shipping routes can be reached

within 24 hours!

A service organization is only as strong as the skill of each

individual service member. Cedervall service engineers are

trained professionals qualified to tackle any sterntube seal job -

repair or service! Our agents are also trained by Cedervall, in our

new testing and training centre- everything to keep up a good

quality! For a complete list of agents, see www.cedervall.com

Cedervall has a central database with full details concerning every vessel carrying a Cedervall

sterntube seal. Having a fully equipped workshop – from casting to machining – spares and repairs can

be produced quickly and accurately.

The service team – a well respected department with ambitions!

Underwater service – a dirty job, but someone has to do it!The Cedervall underwater service unit is using a unique

method implying a complete overhaul of a Cedervall

sterntube seal underwater or just a removal of a rope or

fishing net! Any kind of regular maintenance can also be

done, for example measuring bearing wear down.

A smaller boat is used to work from and

together with a platform; the service is carried

out underwater.

Apart from the cost savings that can be done

with Cedervall sterntube seals in general, the

underwater service also avoids costs for the

customer such as off-hire, goods handling

and unloading and dockings.

SERVICE “Even the best sterntube seal may need a little service from time to time...”

www.cedervall.com

Cedervall

Cedervall & Söner AB, Sweden

Cedervall España S.A. Spain

Cedervall Pte Ltd, Singapore

Cedervall is established at strategically selected locations. To retain continuity in our production, as well as maintaining our extremely high quality, we created advanced communication channels between all our factories and associates.

Cedervall Zhangjiagang Marine Products Co. Ltd

Cedervall (Singapore) Pte Ltd

Cedervall´s service organisation

From here we mainly serve the customers of Asia with all products of the group, such as sterntube seals and complete sterntubes with white metal bearings. A sizeable amount of spare part production is cantered here. Service is also provided for the region with trained service engineers.

n order to supply the Southeast Asian market with spare parts, service and sales support we have set up an office in Singapore. Here we have a spare part stock and trained service engineers who are ready to take any assignment in the region. Our sales and service team is available 24/7 in order to serve our customers with proper support.

I

Apart from the above mentioned Cedervall companies, Cedervall employ many service agencies with specially trained engineers in all of the major ports. A list of service agents is available on www.cedervall.com

Cedervall & Söner AB, Sweden

Cedervall España S.A., Spain

Our company has its roots in Gothenburg. The head office, main research and tech-nological know how is also centred here. Our manufactoring unit, including foundry, takes care of everything from receiving raw materials to delivering new seals and spare parts as well as complete sterntubes.

In our Spanish factory we produce shaft seals as well as several types of sterntube bearings and intermediate shaft bearings. The specia-lity of this plant is renovating and plating of heavy duty bearings. Both shipbuilders and heavy industries are found among the customers.

Cedervall´s production plants

Cedervall Zhangjiagang Marine Products Co. Ltd, China

www.cedervall.com