QUALITY & EXPERTISE FOR YOUR SEALING NEEDS

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EXTRUSION GAPS

Pressure

MPa

Radial gap

F/2

10 MPa

0.25

15 MPa

0.20

20 MPa

0.15

25 MPa

0.10

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SURFACE ROUGHNESS

Roughness

Dynamic surface area

Static surface area

Groove flanks

Ra

0.1 - 0.4 µm

≤1.6 µm

≤3.2 µm

Rz

0.63 - 2.5 µm

≤6.3 µm

≤10.0 µm

Rmax

1.0 - 4.0 µm

≤10.0 µm

≤16.0 µm

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CHAMFERS AND RADIUS

Radial section

S

Radius

R1

Radius

R2

Chamfer

C

4.00

0.20

0.40

2.00

5.00

0.40

0.70

2.50

6.00

0.70

1.10

3.00

7.50

0.80

1.10

4.00

10.00

1.00

1.10

5.00

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DESCRIPTION

The BECA 239 profile is a U-ring

type single acting rod seal with

offset lips composed of a profiled

rubber seal and a bronze-filled

PTFE back-up ring on the back.

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ADVANTAGES

Optimised sealing effect at

average and higher pressures

Good extrusion resistance

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APPLICATIONS

Mobile hydraulics

Material handling - Lifting

Hydraulic cylinders

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MATERIALS

Profiled seal

NBR 85 Shore A

Back-up ring

Bronze-filled PTFE

Other grades of materials are available.

Please contact our experts.

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TECHNICAL DATA

Temperature

-30°C / +200°C

Pressure

25 MPa

Speed

0.5 m/sec

Media

Mineral hydraulic oils

Fire-resistant liquids

Biocompatible fluids

Water

Others (contact our experts)

The figures above indicate the maximum values and may not be cumulated. They may be

developed, depending on the materials used.

ROD SEALS

BECA 239

HYDRAULIC SEALS | ROD SEALS |

BECA 239