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CFKS GA Oil Seal 70*80*47/10 GA Type Double Lip Oil Seal Dust Proof NBR Rubber Shaft Oil Seal

Engineered for demanding industrial rotating equipment, the CFKS GA Oil Seal (70*80*47/10) features an advanced double-lip rubber formulation designed to deliver zero-leakage fluid containment and robust contaminant exclusion. Its rugged metal-reinforced elastomer body ensures exact housing retention, minimizing downtime and maintaining system pressure even under high circumferential velocities.

  • Dual-Action Protection: Primary spring-loaded lip retains lubricants while the secondary dust lip blocks abrasive external particulates.

  • Superior Thermal & Wear Resistance: Formulated from high-grade NBR to withstand thermal cycling and fluid degradation.

  • Precision Fit Dimensioning: Manufactured to precise 70*80*47/10 tolerances for low radial friction and extended shaft service life.

Find your sealing solution with CFKS — contact us for a quote.

Product Name CFKS GA Double Lip Oil Seal Type GA Type Double Lip (Dust Proof)
Specification 70*80*47/10  Material Premium NBR / FKM / PU
Work Temperature -20℃ to 220℃ Hardness 70 – 75 Shore A
Feature High Wear Resistance & Dust Proof Usage Gearboxes, Electric Motors, Pumps, Axles, Hydraulic Cylinders, Machine Tools

 

 

 

The CFKS GA Type Double Lip Oil Seal operates on dynamic hydrodynamic radial contact coupled with secondary axial shielding. The primary sealing lip utilizes a garter spring to exert constant radial pressure against the rotating shaft, creating a micro-thin lubricating oil film that stops liquid passage while reducing contact wear. Simultaneously, the reinforced dust wiper lip provides an auxiliary defense barrier, utilizing centrifugal force during shaft rotation to deflect external dirt, slurry, and airborne grit away from the primary sealing interface.

 

Selecting the appropriate elastomer compound directly governs wear rates and system durability across varied operating environments. Standard NBR provides exceptional resistance to petroleum-based oils, grease, and hydraulic fluids across a broad thermal band (-20°C to 120°C). For applications subjected to extreme heat, synthetic fluids, or aggressive chemicals, CFKS offers high-performance FKM configurations that extend continuous heat resistance up to 220°C, maintaining elasticity without hardening or cracking under severe thermal stresses.

Designed for straightforward, non-destructive installation, the GA profile’s elastomer outer casing ensures uniform force distribution inside the housing bore, eliminating fluid bypass through the outer diameter. Proper installation requires applying a light film of clean lubricant to the sealing lips prior to press-fitting. The low-friction geometry allows for seamless retrofits without necessitating shaft disassembly or expensive shaft sleeves, effectively lowering operational maintenance overhead and preventing premature shaft grooving.

Frequently Asked Questions (FAQ)

Why does my CFKS oil seal fail prematurely? Common causes and prevention tips2025-06-26T15:44:39+08:00

Premature oil seal failure can result from improper installation, poor shaft finish, incorrect material selection, or excessive pressure. To prevent this, ensure the shaft surface is smooth and within tolerance, use correct tools during installation, and choose seals made from materials compatible with your media and temperature.

How to correctly install a CFKS industrial oil seal to avoid leakage2025-06-26T16:04:32+08:00

Always clean the shaft and bore before installation. Use appropriate seal drivers to avoid deformation. Lubricate the lip before fitting to reduce friction during the first rotation. Ensure the seal is seated evenly and not tilted to avoid leaks.

What to do when your CFKS hydraulic seal is leaking under pressure2025-05-20T16:33:14+08:00

Check if the pressure exceeds the seal’s rated limit. Examine for wear, hardening, or improper installation. Replace the seal if damaged, and consider upgrading to a high-pressure CFKS seal variant. Also, verify that the housing and shaft are properly aligned.

How to choose the right CFKS oil seal for extreme operating environments2025-05-20T16:34:39+08:00

For high temperatures, aggressive chemicals, or abrasive environments, choose CFKS seals made of FKM, PTFE, or high-performance elastomers. Consider using seals with protective dust lips or metal casing. Our team can recommend the best fit for your application.

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