Double Lip VB Rubber Oil Seal

Designed for applications where both lubricant retention and external contamination protection are critical, the Double Lip VB Rubber Oil Seal combines a primary sealing lip with an auxiliary dust lip. Compared with standard single-lip seals, it provides significantly better protection against dust, moisture, mud, and other contaminants, helping extend bearing and shaft service life while reducing maintenance frequency.

Suitable for OEM manufacturers, industrial distributors, wholesalers, and aftermarket suppliers, our Double Lip VB Oil Seals are available in standard and custom dimensions with multiple rubber material options. Backed by ISO 9001 and IATF 16949 certified quality management systems, we also ensure full compliance with RoHS and REACH environmental standards.

Unlike conventional oil seals that only retain lubricant, the Double Lip VB design creates two independent sealing barriers:

Primary sealing lip prevents lubricant leakage.

Secondary dust lip blocks contaminants from entering the sealing area.

Optimized lip geometry minimizes friction while maintaining sealing pressure.
Reinforced metal case improves dimensional stability during installation.
Precision-molded rubber ensures consistent lip contact around the shaft.

The result is longer equipment life, lower maintenance costs, and reliable sealing performance in heavy-duty, dusty, or wet operating environments.

The Double Lip VB Rubber Oil Seal consists of several precision-engineered components working together:

Primary Sealing Lip
The main lip maintains constant radial pressure against the rotating shaft. Its functions include:
Retaining grease or lubricating oil
Preventing lubricant leakage
Maintaining stable sealing under continuous rotation

Primary Sealing Lip
The main lip maintains constant radial pressure against the rotating shaft. Its functions include:
Retaining grease or lubricating oil
Preventing lubricant leakage
Maintaining stable sealing under continuous rotation

Rubber Sealing Body
The elastomer body provides flexibility, oil resistance, heat resistance, aging resistance, and elastic recovery. Material options include:
NBR (Nitrile Butadiene Rubber)
HNBR (Hydrogenated Nitrile)
FKM (Viton®)
Silicone
ACM (Polyacrylate Rubber)
Material selection depends on operating temperature, lubricant compatibility, and environmental conditions.

Reinforced Metal Case
The steel insert provides high structural rigidity, accurate outside diameter, easy press fitting, and secure housing retention while preventing deformation during installation.

Optional Spring
For pressure-critical applications, a stainless steel garter spring maintains consistent sealing force even after prolonged service.

Dual Lip Design Improves Contamination Protection
The additional dust lip forms a secondary sealing barrier before contaminants reach the primary sealing interface. This design is particularly effective for construction machinery, agricultural equipment, mining equipment, and outdoor transmissions, significantly reducing contaminant ingress compared to single-lip designs.

Reduced Lubricant Leakage
The precision-molded sealing lip maintains continuous shaft contact while minimizing excessive friction, resulting in stable oil retention, less lubricant consumption, cleaner equipment, and lower maintenance costs.

Longer Equipment Service Life
Dust and abrasive particles are among the leading causes of bearing wear. By reducing contamination entering the rotating assembly, the Double Lip VB Oil Seal helps protect bearings, shafts, gearboxes, gear reducers, and hydraulic components, preventing premature component failure and unplanned downtime.

Performance depends on rubber material selection. The standard working temperature ranges are outlined below:

Manufactured using precision compression or injection molding, the sealing lip features uniform lip geometry, stable contact pressure, reduced uneven wear, and a longer sealing life. Critical dimensions are tightly controlled throughout production to ensure a better shaft fit, reduced installation problems, and consistent replacement compatibility with OEM components.

NBR: Best for mineral oil, hydraulic oil, and grease. Offers excellent oil resistance, cost-effectiveness, and good wear resistance.

HNBR: Recommended for high mechanical loads, elevated temperatures, and long service life.

FKM: Ideal for high temperatures, synthetic lubricants, and chemical exposure, offering outstanding resistance to heat, oxidation, and aggressive fluids.

Silicone: Suitable for very low temperatures, food equipment, and light-duty applications.

ACM: Recommended for automatic transmission systems and hot lubricating oils.

The Double Lip VB Rubber Oil Seal is widely used wherever equipment operates in dusty or contaminated environments:

Agricultural Machinery: Tractors, harvesters, seeders, and rotary tillers.

Construction Equipment: Excavators, wheel loaders, bulldozers, and rollers.

Industrial Gearboxes: Protects gear reducers from lubricant leakage and dust ingress.

Electric Motors: Maintains bearing lubrication while preventing external contamination.

Pumps: Suitable for water pumps, hydraulic pumps, and industrial pumps.

Automotive Systems: Used in wheel hubs, axles, differential systems, and transmission components.

Mining Equipment: Provides reliable sealing under abrasive dust conditions.

Many equipment failures originate from poor sealing rather than component defects. Our seals directly address:

Oil leakage after long operating hours and lubricant contamination
Dust entering bearings and premature bearing failure
Frequent seal replacement and equipment downtime
Shaft wear caused by abrasive particles and increased maintenance costs

Every seal is produced under controlled manufacturing procedures backed by our factory's precision rubber compound formulation, automated molding equipment, controlled vulcanization process, precision trimming, and dimensional inspection.

Quality Control Checks: Each production batch undergoes incoming raw material inspection, rubber hardness testing, dimensional measurement, visual and surface defect inspection, lip integrity inspection, metal bonding inspection, and final sampling inspection before shipment to ensure batch consistency.

We support complete OEM and custom production. Customization options include custom dimensions, rubber compound selection, spring material, housing design, color customization, logo marking, packaging, and private labeling.

Business Support: We warmly welcome sample testing requests to verify performance prior to volume production, offering flexible minimum order quantities (MOQ) for both standard and custom specifications.

Packaging Options:
Individual bags and bulk packaging
Barcode labels and OEM/export cartons
Palletized shipment customized to distributor or wholesale requirements

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