Combi Oil Seal Series for Reliable Sealing in Harsh Dynamic Applications

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You might not notice every seal in a machine—until it fails. In systems where shafts or pistons move back and forth—or where contamination is rampant—a traditional oil seal often comes up short. That’s why some engineers turn to what’s known as a “combi oil seal,” essentially a combination of two or more oil-seal parts working together.

In most basic configurations, combi seals consist of steel rings and oil-resistant rubber. But a more advanced version pairs PTFE with oil-resistant elastomer. That blend handles higher pressure, resists higher temperature, offers superior wear longevity, and keeps friction extremely low.

Why a Combi Oil Seal Can Outperform a Single Seal?

· Leveraging material strengths

Each component material shines in one area. Rubber flexes and seals well; PTFE resists heat and friction. When combined, the resulting structure delivers both advantages—not just average performance.

· Suited for reciprocating motion

Combi seals work well where parts move forward and back. The PTFE sliding surface stays smooth under movement, resists debris sticking, and minimizes wear—even under extended cycling.

· Rubber contact is minimal

In many designs, the rubber elements only touch the shaft or housing slightly. That reduces distortion or rolling issues, so sealing remains reliable over time.

· Enhanced PTFE is a go‑to

Engineered PTFE used in these seals not only lowers friction coefficients, but is compatible with almost all media except strong acids and bases. It delivers mechanical stiffness and strength across a broad application range.

· Long lifespan

The combination of low-wear PTFE and stable rubber sealing yields a seal that lasts far longer than typical lip seals.

Compact dual‑direction sealing possible

Combi seals can be compact while offering two-way sealing, or used in pair for single‑direction applications—a space-saving yet effective solution.

Combi Oil Seal Performance Specs

· Basic steel‑rubber version: ideal for low-pressure, low-speed reciprocating setups.

· Spring-loaded variant: adds preload for vacuum or fluctuating pressure environments.

· Bidirectional design: seals in both directions using compact form factor.

Where the Combi Seal Fits

· Agricultural equipment like harvester and seeder shafts

· Industrial pumps, gearboxes, and hydraulic systems where access is limited

· Heavy trucks and construction machinery axles

· Robotic arms or automated joints operating in dusty or lubricated environments

· Wind turbine yaw drives, where sand or salt exposure is frequent

· Rail transit drive systems and high-speed electric train components

· Metallurgical lines, including rollers and casting equipment

NQKSF Service Commitment & Company Highlights

· Standard parts ready to ship: Over 10,000 SKUs in stock, including O‑rings, combi seals, standard oil seals—quick response for urgent needs

· Full customization services: From material selection and structure design to production testing, delivering non‑standard solutions tailored to precise operating conditions

· Technology‑driven system enablement: Backed by 30+ years of sealing expertise, NQKSF assists in optimizing seal performance, reducing maintenance, and enhancing equipment reliability

Enterprise Advantages:

· Owns an intelligent manufacturing plant with full production control

· Recognized as the sealing industry leader, with complete model ranges and stocked inventory

· Products shipped to over 80 countries, serving globally known brands

· Awarded titles like Provincial Tech Innovation Center, Specialized and Innovative Enterprise, High‑tech Enterprise, and is a key cluster leader in sealing technology

Combi Oil Seal series offers a practical, durable sealing solution built for dynamic machinery in demanding environments. Backed by NQKSF is global stock, customization options, and decades of tech know‑how, users can rely on combi seals to deliver consistent performance and lower maintenance demand over time.