Professional O-Ring and Oil Seal Manufacturer, Sealing Solution Supplier Since 2008.
KC Type Double-Lip Internal Skeleton Oil Seal
Engineered for Efficient Sealing in Automotive, Agricultural & Construction Machinery
The KC oil seal is a high-performance spring-free sealing solution with an internal skeleton, featuring double sealing lips and an extra dust lip for all-around protection. Its rubber-coated outer diameter enhances sealing tightness, while the spring-free design reduces wear risks and ensures low friction.
Engineered for durability, it boasts excellent elasticity, heat resistance, and wear resistance, reliably sealing oil, gas, or water paths even in heavy-duty conditions. Ideal for automotive engines, transmission systems, agricultural machinery, and petrochemical equipment, it extends component lifespan by blocking dust and preventing leaks—delivering consistent performance to support efficient machinery operation.
5.0
design customization
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Please fill out the form below to request a quote or to request more information about us. please be as detailed as possible in your message, and we will get back to you as soon as possible with a response. we're ready to start working on your new project, contact us now to get started.
1. Product Advantages
Spring-Free Design: Eliminates spring-related wear and assembly complexity, reducing maintenance frequency and extending the seal’s service life by 20% compared to spring-equipped alternatives (e.g., TC seals).
Dual Protection: Double sealing lips ensure tight sealing of oil, gas, and water paths, while an extra dust lip blocks contaminants—preventing component damage from dust, debris, or fluid leaks.
Enhanced Sealing Capacity: A rubber-coated outer diameter adapts to housing tolerances, boosting sealing tightness even in high-vibration scenarios.
Durable Performance: Crafted with Forever Seals’ proprietary rubber compound, it offers excellent heat resistance (-20℃ to 120℃), wear resistance, and elasticity—maintaining stability under heavy-duty conditions.
2. Working Principle
The KC seal’s internal skeleton provides structural support to maintain its shape under pressure. When installed, the double lips form tight contact with the shaft, creating a barrier against fluid leakage. The dust lip acts as the first line of defense, blocking external particles from reaching the main sealing area. Meanwhile, the rubber-coated outer diameter adheres closely to the housing, eliminating gaps—ensuring consistent sealing performance without relying on a spring.
3. Product Details
Structure: Internal skeleton + spring-free design + double sealing lips + extra dust lip.
Material: High-quality nitrile rubber (NBR) or fluoroelastomer (FKM) (customizable for special working conditions) + steel skeleton.
Dimensions: Standard sizes (e.g., 15×30×7mm, 20×40×8mm) available; custom dimensions can be provided upon request.
Certifications: ISO 9001, SGS—ensuring compliance with global industrial standards.
4. Application Range
It is ideal for machinery requiring reliable sealing, including:
Automotive Industry: Engines, transmission systems, axles.
Agricultural Machinery: Tractors, harvesters (suitable for dust-prone environments).
Petrochemical Sector: Pipes, valves, reactors (for oil and gas sealing).
Construction Machinery: Excavators, loaders (adaptable to heavy-vibration conditions).
5. FAQ
Q1: Can the KC seal replace TC seals?
A: Yes—especially for scenarios where spring wear is a concern (e.g., low-speed shafts) or dust protection is critical. For ultra-high-pressure working conditions, please consult Forever Seals’ engineers for professional advice.
Q2: What is the service life of the KC seal?
A: Typically 12–24 months under standard operating conditions; the service life can be extended with proper installation and regular maintenance (Forever Seals provides detailed installation guides for reference).
6. Forever Seals’ Selling Points
Rich Experience: With over 15 years of experience in seal manufacturing, we offer custom solutions tailored to unique customer needs.
Strict Quality Control: Every KC seal undergoes 100% leak testing before shipment to ensure flawless performance.
Global After-Sales Service: We provide 24/7 technical support and fast replacement for defective products, ensuring a worry-free experience for customers worldwide.
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