Oil Seals AS: page 77
AS-type seals are an improved version of the standard A-type seal, featuring an additional lip to protect against dust and contaminants. This additional, outward-facing lip prevents dust, dirt and abrasive particles from entering the housing, significantly extending the service life of the main seal and the bearings. AS oil seals are recommended for applications where the shaft is exposed to contaminated environments – agricultural machinery, construction equipment and the mining industry. In the Hydraulic Seals Store catalogue, you’ll find AS oil seals made from NBR and FKM, available from stock with fast delivery in Romania.
Features of AS seals and their role in sealing
The AS oil seal combines the primary oil seal (inner lip) with active protection against contaminants (outer lip). This dual-function design makes it superior to the standard A oil seal in any application where there is a risk of contamination. See also the SA-TA and SB-TB oil seals for other sealing solutions with advanced protection.
Features of AS oil seals
Effective shaft sealing
The main sealing lip of the AS oil seal functions in the same way as that of the A oil seal – it maintains contact with the shaft and prevents oil leakage. The inner spring ensures the necessary pressure on the sealing lip throughout the oil seal’s service life.
Additional protection against contaminants
The additional, outward-facing dust lip acts as a scraper, removing particles from the shaft surface before they reach the main lip. This significantly reduces wear on the oil seal and bearings, extending the service interval.
How to choose the right AS oil seal
When selecting an AS oil seal, check the shaft diameter, the outer diameter of the housing, the width and the material of the lip (NBR or FKM). Also refer to the A-series oil seals for comparison.
The benefits of buying AS seals from the Hydraulic Seals Store
Hydraulic Seals Store offers AS seals from stock at all times, in various sizes and materials, at competitive prices, with fast delivery in Romania. Our team is available to provide technical support. Buy high-quality AS seals at a great price, directly from our catalogue.
Frequently Asked Questions
When is an AS oil seal recommended instead of an A oil seal?
An AS oil seal is recommended when the shaft is exposed to dust, mud or abrasive particles in the working environment. The additional dust lip extends the service life of the oil seal and the bearings.
How do AS oil seals help protect against dust?
The additional outer lip of the AS oil seal acts as a scraper, removing particles from the shaft before they reach the main sealing lip, thereby preventing abrasive wear.
For which working environments are AS oil seals suitable?
AS oil seals are suitable for environments containing dust, mud, moisture or other contaminants. They are frequently used in agricultural machinery, construction machinery, the mining industry and other demanding applications.
What should be checked before fitting an AS oil seal?
Check the condition of the shaft (smooth surface, free from corrosion or signs of wear), the dimensions of the housing and the fitting direction of the two lips to ensure an effective seal.