QUALITY & EXPERTISE FOR YOUR SEALING NEEDS



EXTRUSION GAPS

Radial section

S

Radial gap

F/2

2.45

0.20

3.75

0.25

5.50

0.25

7.75

0.30

10.50

0.30

12.25

0.35

14.00

0.35

19.00

0.40



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



CHAMFERS AND RADIUS

Radial section

S

Radius

R1

Radius

R2

Chamfer

C

2.45

0.30

0.40

3.00

3.75

0.30

0.60

3.00

5.50

0.30

1.00

3.00

7.75

0.30

1.30

5.00

10.50

0.30

1.80

6.00

12.25

0.30

1.80

8.00

14.00

0.30

2.50

10.00

19.00

0.30

3.00

12.00



DESCRIPTION

The BECA 520-522-524 profiles

are double acting composite piston

seals composed of a pre-tightened

rubber O'Ring and a custom-

made polyurethane friction ring.



ADVANTAGES

Optimal sealing in static and

dynamic applications

Excellent abrasion and wear resistance

Assembled by deformation



APPLICATIONS

Agriculture

Light and medium-sized industry

Machine tools

Material handling/Lifting



MATERIALS

Friction ring

PU 93 Shore A - Blue

PU 96 Shore A - Blue

High temp. PU 96 Shore A - Beige

TPC-E (Hytrel)

O'Ring

NBR 70 Shore A

Other grades of materials are

available. Please refer to the

materials table on the next page.



TECHNICAL DATA

Temperature

-30°C / +100°C

Pressure

25 MPa

Speed

0.5 m/sec

Media

Mineral hydraulic oils

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

developed, depending on the materials used.

PISTON SEALS

BECA

520-522-524

HYDRAULIC SEALS | PISTON SEALS |

BECA 520 - 522 - 524