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Rotary shaft seal equivalent to WA ­type in the Y design, pressurisable. It has a shorter, stronger, spring energised sealing lip. In addition, this model is available with a protective lip (WASY) on the air side.

Product group: Rotary shaft seal
Design: A = outer surface rubber-coated
Model: SY = sealing lip and protective lip pressurisable
Seal material: NBR 80
Colour: blue
Stiffening ring: non-alloy steel according to DIN EN 10139
Tension spring: non-alloy spring steel according to DIN EN 10270-1

Areas of application
Sealing of rotating machine elements such as shafts, hubs and axles when pressurised. The main area of application is in pressurised systems such as pumps and hydro-motors.

The WASY is a single-action rotary shaft seal for rotating or pivoting shafts with optional protective lip sealing action (WASY) on the side facing away from the medium, against dirt accumulation from the outside.
The shorter, thicker, spring-energised sealing lip enables pressure application of up to 10 bar (depending on the rotational speed). The elastomer outer sheath provides good static sealing, good thermal expansion balance, e.g. in light-metal housing, better sealing with greater roughness and secure sealing for split housings as well as good static sealing with thin fluid or gaseous media.

Good chemical resistance to many mineral oils and greases.

Operational application limits
Pressure (Mpa/bar): ≤10 bar ­depending on the rotational speed
Temperature (°C): -40 to +100
Peripheral speed (m/s): ≤ 10

Suitable tools should be used for ­installation. It is recommended that the installation housing is designed to provide the rotary shaft seal with axial support.

The nominal widths mentioned on the following pages represent the standard dimensions. They are generally in stock or can be delivered at short notice. Other dimensions and different designs, e.g. springs or metal inserts made of other steel grades can be produced as well as some special designs. Minimum quantities may be obligatory for dimensions outside of the standard.

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