Current position >About Us
V-Ring Seal Manufacturer in China: Sizing, Material and RFQ Checklist
Quick Answer: A V-ring seal is an axial rubber seal that fits on a rotating shaft and keeps dust, dirt, water, and splash oil away from bearings and other seals. When you evaluate a V-ring seal manufacturer in China, confirm the shaft diameter, profile, material, speed, and counterface condition. CORASEALS supplies V-ring seals from China and can quote once you send the shaft diameter, material, and quantity.
V-ring seals are not radial shaft seals. They use a flexible lip that contacts a stationary face at a 90 degree angle to the shaft. The seal body grips the shaft and rotates with the shaft. This design works as a deflector, flinger, and grease retainer in gearboxes, electric motors, pumps, conveyors, agricultural equipment, and mobile machinery.
Many buyers search for a V-ring seal manufacturer in China because they need a reliable elastomer seal for bearing protection. The main sourcing task is not only finding a supplier. You also need to confirm the axial lip profile, material grade, and installation clearance before purchasing. A V-ring seal that looks similar may fail early if the lip interference or compound is wrong.
What to Confirm Before Sourcing V-Ring Seals
- Shaft diameter: this is the main sizing dimension for the V-ring seal.
- Axial space: confirm the available gap between the housing face and the shaft shoulder.
- Profile type: compare the seal cross section drawing, not only a short code.
- Material: NBR, FKM, HNBR, and EPDM are common options.
- Operating speed: high shaft speed may require a different lip geometry or material.
- Medium and environment: oil splash, grease, water, dust, chemicals, or outdoor exposure change material selection.
Material Selection for V-Ring Seals
| Material | Common Applications | Common Limitations |
|---|---|---|
| NBR | Mineral oil, grease, water, general dust exclusion | Not for strong ozone, weather, polar solvents, or high temperature |
| FKM | High temperature, mineral oil, fuels, many chemicals | Usually not recommended for steam, hot water, ketones, or some polar solvents |
| HNBR | Mineral oil, higher temperature, abrasion, ozone | Higher cost than NBR; not for all polar solvents |
| EPDM | Water, steam, outdoor weather, some polar fluids | Not for mineral oil, grease, or fuels |
V-Ring Seal vs Radial Oil Seal
A radial oil seal runs on the shaft surface. A V-ring seal runs on a counterface perpendicular to the shaft. If a shaft is worn or scored, a V-ring can sometimes provide better dust exclusion because the lip does not run on the damaged shaft area. But a V-ring is not a direct replacement for a radial oil seal when the system must retain pressurized oil or maintain a radial lip on the shaft.
Installation Notes for V-Ring Seals
V-ring seals need a flat counterface that is square to the shaft. Check the counterface for sharp edges, grooves, runout, and surface defects. The seal lip must sit evenly on the counterface. If the lip is pressed too hard against the face, it can generate heat and wear early. If the axial clearance is too large, dust and water can pass.
Mount the V-ring seal with the correct axial clearance and check that the seal body is not folded or twisted. These seals are not pressure seals. Do not use them as hydraulic rod seals, piston seals, or high pressure rotary shaft seals.
Five Common Questions
1. Can a V-ring seal replace a TC oil seal?
No. A TC oil seal seals on the shaft. A V-ring seals on a perpendicular face. A V-ring can be used as an additional excluder but not as a direct substitute for a radial shaft oil seal.<