Large-Diameter Oil Seals

FOS Large-Diameter Oil Seals (OD from 400 ~ 870 mm) are engineered for heavy-duty rotating equipment where conventional standard seals are no longer suitable.

Our large diameter sealing solutions can be customized according to shaft diameter, housing dimensions, operating speed, temperature, pressure, lubricant, contamination level, and installation conditions.

Typical Applications

Large-Diameter Oil Seals are widely used in:

• Steel mills and rolling equipment
• Mining and mineral processing machinery
• Cement and grinding equipment
• Large industrial gearboxes
• Wind power equipment
• Paper and pulp machinery
• Marine and propulsion equipment
• Heavy-duty construction and tunnel boring machinery

Key Features

• Suitable for large shaft diameters
• Excellent tolerance to shaft runout and misalignment
• High flexibility for dynamic shaft movement
• Reliable lubricant retention
• Protection against dust, water, mud, and abrasive contaminants
• Available in NBR, FKM, and other elastomer compounds
• Custom lip profiles and spring designs
• Engineered according to actual operating conditions

FOS Large Diameter Seals — Engineered for Heavy Industry. Built for Reliable Performance.