Hydrolic seals - Trelleborg Sealing Solutions - #25

The following material combination has proven effective for applications with hydraulic oils containing zinc:

Turcon® Stepseal® 2K: Turcon® T46

- Mobile hydraulic

- Standard cylinders

- Machine tools

- Injection moulding machines

- Presses

- Automobile industry

- Hydraulic hammers

- Servo hydraulics

In many applications, secondary seal systems are demanded. Figure 16 shows such a tandem configuration with the Stepseal® 2K.

NBR, 70 Shore A FKM, 70 Shore A

T46N/T46V

O-Ring:

Set code:

N

V

For specific applications, other material combinations as listed in Table X, may also be used.

Different cross-section sizes are recommended as a function of the seal diameters. These are the criteria for these recommendations.

Table XI, shows the relationship between the series number according to the seal diameter range and the different application class sizes. These application classes are:

Standard application:

General applications in which no exceptional operating conditions exist.

Applications with demands for reduced friction or for smaller grooves.

For exceptional operating loads such as high pressures, pressure peaks, etc.

Light application:

Heavy-duty application:

Figure 16 Turcon® Stepseal® 2K and Zurcon® Rimseal in tandem configuration

In this configuration it must be noted that a sufficiently large space is formed between the seals to take the hydraulic fluid, as shown in the figure.

Depending on the application and the operating conditions, the combination of different materials offers a further improvement in the sealing efficiency and the service life of the system, e.g. in hydraulic cylinders subject to high loads and under rough operating conditions, the primary seal should be made of Turcon® and the secondary seal of Zurcon®.

For the recommended range see Table XI.

Latest information available atwww.tss.trelleborg.com Edition April 2007

TRELLEBORG

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