Sealing Excellence, Securing Industry

CFKS USH Oil Seal 30*40*6 Piston Rod Seal USH Hydraulic Oil Seal

CFKS USH Oil Seal 30*40*6 is a durable hydraulic piston rod seal designed for stable performance and long service life. This USH Oil Seal offers excellent wear resistance and reliable fluid sealing for hydraulic cylinders and industrial machinery. CFKS USH Oil Seal 30-40-6 | High-Performance Hydraulic Piston Rod Seal | USH Hydraulic Oil Seal. Find your sealing solution with CFKS — contact us for a quote.

Brand Name CFKS OEM  Accpetable
Material NBR FKM Silicone  Features  wear resistance
Dimensions Customized Certificate  ISO9001/TS16949
Type USH Oil Seal   Packing 1 pc per bag

 

The CFKS USH Oil Seal 30*40*6 is engineered for high-precision hydraulic systems that require reliable piston rod sealing and long-term durability. Made from premium polyurethane and elastomer materials, this USH hydraulic oil seal ensures excellent resistance to pressure, wear, and extrusion. It maintains stable sealing performance even under continuous high-frequency motion.

As a widely used piston rod seal structure, the USH Oil Seal provides superior friction control, effective fluid retention, and excellent protection against contaminants. Its optimized lip design improves sealing efficiency while reducing energy loss, making it ideal for hydraulic cylinders, industrial machinery, and automation equipment.

CFKS offers customized sizes, materials, and OEM manufacturing to meet diverse application requirements. Whether for hydraulic repair, OEM cylinder production, or aftermarket replacement, the USH Hydraulic Oil Seal delivers consistent performance and long service life. It is a dependable choice for customers seeking high-quality piston rod sealing solutions.

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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