Product Attributes

• Inner Diameter: 73 mm

• Outer Diameter: 90 mm

• Width / Thickness: 7 / 8 mm

• Model / Type: BAFSL1SF

• Material: Viton / FKM (Fluoroelastomer)

• Color: Brown‑Viton rubber + metal skeleton / spring lip

• Seal Type: Radial Shaft / Rotary Shaft Oil Seal

• Spring Loaded: Yes, spring‑lip design for sealing pressure

• Suitable Media: Mineral oils, hydraulic fluids, lubricants, greases

• Temperature Resistance: Continuous approx. −20 °C to +200 °C; short‑term up to about +230 °C depending on grade

• Chemical Resistance: Excellent; resistant to many hydrocarbons, fuels, oils, oxidation, ozone

• Wear Resistance: High, due to durable Viton material and reinforced structure

• Aging Resistance: Very good for Viton under heat / oil / exposure conditions

• Operating Environment: For hydraulic motors, pumps (like SAI Motor), machinery exposed to higher temperatures and demanding oil/chemical conditions

• Installation: Press‑fit into housing bore; proper shaft finish important for sealing lip performance

• Lip Design: Spring lip, single or double sealing lip depending on variant

• Backing / Skeleton Structure: Metal reinforcement to resist deformation under pressure

• Oil Resistance: Excellent for mineral & synthetic oils

• Dimensional Tolerance: Precise manufacturing to avoid leakage and ensure fit

• OEM / Part Number: 1906003

• Application: SAI hydraulic motors and similar industrial motors/pumps

• Label / Marking: “73×90×7/8”, “BAFSL1SF”, “1906003”, “Viton”

• Origin / Manufacturer: China

• Quality Standard: High pressure seal performance, durability in hydraulic applications

• Packaging: Individual sealed box, outer carton

• Weight: Light (tens of grams)

• Pressure Cycling Durability: Designed to withstand repeated pressure fluctuations

• Seal Contact Surface Finish: Smooth lip edge

• Compatible Shaft Material: Steel / alloy shafts

• Corrosion Resistance: Metal skeleton likely coated/treated

• Ambient Temperature Range: approx −20 °C to +200 °C

• Sealing Pressure Range: Medium to high pressure hydraulic environments

• Maintenance: Replace if lip shows leak, hardening, or damage

• Service Life: Long under recommended conditions

• Speed / Shaft RPM Limit: Suitable for typical hydraulic motor speeds

• Installation Space Requirement: Housing must allow OD 90 mm and depth for 7–8 mm lip width

Product Description

This high‑pressure radial shaft seal, model BAFSL1SF, size 73×90×7/8 mm, made of premium Viton (FKM) with a metal skeleton and spring‑lip design, provides excellent sealing performance under oil, hydraulic fluid and harsh chemical exposure. Optimized for use in SAI hydraulic motors, it offers high temperature tolerance, superior chemical and aging resistance, and durability in demanding industrial and heavy machinery applications.