QUALITY & EXPERTISE FOR YOUR SEALING NEEDS



EXTRUSION GAPS

Radial section

S

Radial gap

F/2

2.45

0.20

3.75

0.30

5.50

0.30

7.75

0.40

10.50

0.40

12.25

0.50

14.00

0.60

19.00

0.70



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 525 profile is a double acting

composite piston seal composed

of a pre-tightened rubber O'Ring

and a trapezoidal friction ring made

from polyurethane or TPC (Hytrel)

depending on the type of application.



ADVANTAGES

Optimal sealing in static and

dynamic applications

Excellent abrasion and wear resistance

 



APPLICATIONS

Agriculture

Middle-sized and heavy 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 525

HYDRAULIC SEALS | PISTON SEALS |

BECA 525