BABSL

This product features a tension spring, a rubberized outer jacket, and a protective lip, along with a shortened sealing lip. The sealing materials used are FKM and NBR, with a reinforcement sheet made from unalloyed steel (DIN EN 10027-1) and a tension spring made from spring steel (DIN EN 10270-1).

FUNCTION

Designed for dynamic sealing of a rotating shaft at high pressures, regardless of the direction of rotation, this product is self-retaining and ensures a good static seal between the sealing lip and the shaft when stationary. The rubberized outer jacket guarantees a tight fit and seal to the housing bore, while the protective lip prevents dirt accumulation from outside. The shortened sealing lip allows for higher operating pressure. However, increased friction can lead to a rise in temperature.

PRODUCT ADVANTAGES

This product offers a very good static sealing effect with low-viscosity or gaseous media and compensates for thermal expansion, making it ideal for use in light metal housings. It provides excellent sealing with greater roughness and in split housings. The product boasts high chemical resistance, no stick-slip effect, superior quality, and the highest functional reliability. It has the longest service life, a compact design, and requires no support ring.

APPLICATIONS

Suitable for pressurized units such as hydraulic pumps, motors, and hydrodynamic couplings, this product meets the highest standards of performance.

Application Limits

• Maximum pressure: 145 PSI
• NBR temperature range: -40 to 80°C (short-term up to 100°C), max speed: 10 m/s
• FKM temperature range: -25 to 200°C, max speed: 34 m/s

Media Resistance

NBR:

• Resistant to various mineral oils and greases
• Limited resistance to ozone, weathering, and aging

FKM:

• Resistant to mineral and synthetic oils, fuels, and flame-retardant fluids
• Excellent resistance to ozone, weathering, and aging

Design Guidelines

• Design installation space according to DIN 3760
• Ensure shaft roundness (tolerance class IT8) and appropriate surface roughness (Rz = 1.0 to 4.0 µm)
• Shaft surface hardness should be at least 45 HRC
• Housing surface roughness: Rz = 10 to 20 µm
• Shaft tolerance zone: ISO h11; housing tolerance zone: ISO H8

Installation Guidelines

• Thoroughly clean the installation area before assembly
• Avoid pulling the seal over sharp edges; use a mounting sleeve if necessary
• Do not grease the seal or installation space
• Ensure careful, non-tilted installation on the shaft

Storage Advice

• Store at temperatures below 25°C
• Avoid direct heat sources, sunlight, and condensation
• Protect from ozone or ionizing radiation
• Follow ISO 2230 storage recommendations