✅ I. Structural Features

• Multi-piece construction: Typically consists of a support ring, multiple V-shaped sealing rings, and a pressure ring. The number of sealing rings can be adjusted according to system pressure.

• V-shaped sealing lips: Designed with elastic structure that automatically expands under pressure, tightly contacting the shaft or cylinder wall for effective sealing.

• Replaceable segments: Each component is independent. If one is damaged, it can be replaced individually, improving maintenance efficiency.

• Clear installation direction: Each V-ring lip faces the pressure direction, forming a "pressure-activated" sealing system.

⚙️ II. Performance Features

• Suitable for high-pressure environments: Can withstand pressures up to 40 MPa (or even higher depending on material and design).

• Reliable sealing performance: Maintains a seal even at startup under low or no pressure; does not rely solely on system pressure.

• Tighter seal with higher pressure: Sealing rings expand automatically when compressed, enhancing contact and sealing performance.

• Excellent wear resistance: Especially when using fabric-reinforced rubber, suitable for high-frequency reciprocating motion.

• Good self-adjusting ability: Can adapt to slight eccentricity or wear on the shaft or cylinder bore.

• Well-suited for harsh environments: Ideal for industrial settings such as dust, cement, metallurgy, and injection molding.

? III. Material Characteristics (can be mixed and matched)

• NBR (Nitrile Rubber): Oil-resistant, good elasticity, general-purpose. Suitable for pressures ≤ 25 MPa.

• PU (Polyurethane): High wear resistance, high strength, excellent elasticity. Suitable for pressures ≤ 32 MPa.

• Fabric-reinforced NBR: High-pressure resistance, excellent anti-extrusion performance, ideal for heavy-duty applications. Suitable for pressures ≤ 40 MPa.

• PTFE (Teflon): Extremely low friction, suitable for high-speed and high-temperature environments. Suitable for pressures ≤ 20 MPa (requires backup ring support).

?️ IV. Usage Notes

• Install with the open side of the V-rings facing the pressure source.

• Select the number of V-rings based on system pressure (higher pressure → more rings).

• Lubricate the sealing lips before installation to avoid dry-start wear.

• Use in combination with dust seals and buffer seals to extend service life.

• Ensure groove dimensions are accurate; too tight or too loose can lead to leakage or premature wear.

?️ V. Typical Applications

• Large hydraulic cylinders (for piston or rod sealing)

• Injection molding machines, forging presses, stamping machines

• Metallurgical and mining equipment

• Marine hydraulic systems

• Hydraulic control systems in hydropower stations

✅ Summary: Key Features of V-type Combined Oil Seal

• Strong sealing capability: Handles high pressure, heavy loads, and reciprocating motion.

• Adjustable structure: Flexible number of sealing rings to suit various working conditions.

• Long service life: Excellent extrusion and wear resistance, easy maintenance.

• Self-energizing performance: The higher the pressure, the tighter the seal—minimizing leakage.

• Easy to maintain: Damaged segments can be individually replaced, reducing maintenance cost.