ASL Single Lip Rotary Shaft Seal

Overview

This standard design, compliant with DIN 3760, features a spring-loaded single-lip configuration without a protective lip. It includes a rubberized outer jacket for enhanced fit and sealing against the housing bore. The sealing materials available are NBR and FKM, with an unalloyed steel stiffening plate and a spring made of DIN EN 10270-1 spring steel.

Functionality

These seals dynamically and statically seal rotating shafts, regardless of rotation direction. The rubberized outer jacket ensures a tight fit and seal to the housing bore, even at standstill.

Product Advantages

  • Excellent static sealing with low-viscosity or gaseous media
  • Compensates for thermal expansion, especially in light metal housings
  • Effective sealing on rough or split housing surfaces
  • Long service life and broad application spectrum for general industry needs
  • Competitive price/performance ratio
  • Manufactured by certified suppliers

Applications

Ideal for sealing rotating machine elements like shafts, hubs, and axles.

Application Limits

  • Maximum pressure: 0.05 MPa
  • 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

ASL Single Lip Technical Information

SpecificationDetails
Pressure CapacityMaximum of 7 psi.
Operational Speed43 ft/s
Temperature Range-40 to 200°C | -40 to 392°F

PTFE Sealing Jacket

MaterialDescriptionTemperature Range
NBRNBR (Nitrile Butadiene Rubber) is a highly valued sealing material due to its excellent resistance to oils, fuels, and other chemicals, making it an ideal choice for applications in the automotive and aerospace industries. With a temperature operating range, NBR provides versatility under varied environmental conditions. Very cost effective option.-40°C to 120°C

-40°F to 248°F

FKMFKM (Fluoroelastomer) is highly regarded in the sealing industry for its exceptional resistance to high temperatures, chemicals, and aging, making it indispensable in aerospace, automotive, and chemical processing sectors. This material thrives across a wide temperature range, enabling its use in extreme conditions where other materials would fail. FKM’s remarkable compatibility with a wide variety of chemicals, including oil, fuel, and solvents, along with its ability to withstand harsh environmental factors, ensures its preference for high-performance seals, O-rings, and gaskets. Its robustness and longevity under aggressive conditions underscore FKM’s value as a premier choice for demanding sealing applications.-20°C to 200°C

-4°F to 392°F

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