Sealing Excellence, Securing Industry

CFKS Hydraulic Cylinder Rod U+S Oil Seal Hydraulic Seal Piston Rod Oil Seal

CFKS U+S Oil Seal is a durable hydraulic seal designed for piston rod sealing in hydraulic cylinders, offering strong oil retention, low friction, and excellent contamination resistance for industrial machinery.  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 U+S Oil Seal  Packing 1 pc per bag

 

The CFKS U+S Oil Seal is a high-performance hydraulic seal designed for hydraulic cylinders requiring reliable sealing of piston rods. Made from premium PU and NBR materials, this hydraulic seal provides superior wear resistance, low friction, and excellent sealing performance under demanding working environments. It is suitable for medium and high-pressure hydraulic systems and offers stable operation even under long-term continuous use.

The U+S Oil Seal features a dual-lip structure combining a U-ring and secondary dust sealing surface, ensuring enhanced oil retention while preventing contaminants such as dust, water, and metal particles from entering the system. This hydraulic cylinder seal reduces oil leakage, prolongs service life, and improves operating efficiency. Its optimized sealing geometry ensures stable sealing performance with minimal start-up friction and consistent running torque.

CFKS U+S hydraulic seals are widely used in construction machinery, industrial equipment, agricultural hydraulic systems, lifting devices, and heavy-duty machinery. Whether used as a piston rod oil seal, return cylinder seal, or hydraulic cylinder sealing component, the U+S Oil Seal provides stable sealing reliability across demanding working temperatures and pressure environments, ensuring maximum operational efficiency and equipment protection.

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.

CFKS Seal Manufacturing Co., Ltd.
https://cfksseals.com/
 Email: cfksnacy@gmail.com  Mobile/WhatsApp/Wechat: (86) 188-3097-5917
U+S Seal Size List
TypeMaterialSIZE
U+S Hydraulic Oil sealPU+NBR4*10*4
U+S Hydraulic Oil sealPU+NBR4*11*5
U+S Hydraulic Oil sealPU+NBR4.5*9.5*4
U+S Hydraulic Oil sealPU+NBR5*12*5.5
U+S Hydraulic Oil sealPU+NBR5*12*6
U+S Hydraulic Oil sealPU+NBR5*12*8
U+S Hydraulic Oil sealPU+NBR5*14*8
U+S Hydraulic Oil sealPU+NBR6*12*5
U+S Hydraulic Oil sealPU+NBR6*12*5.5
U+S Hydraulic Oil sealPU+NBR6.3*16.3*8
U+S Hydraulic Oil sealPU+NBR7.1*17.1*8
U+S Hydraulic Oil sealPU+NBR8*14*6
U+S Hydraulic Oil sealPU+NBR8*14*8
U+S Hydraulic Oil sealPU+NBR8*16*5.7
U+S Hydraulic Oil sealPU+NBR8*16*6
U+S Hydraulic Oil sealPU+NBR8*16.8
U+S Hydraulic Oil sealPU+NBR8*18*8
U+S Hydraulic Oil sealPU+NBR8*22*10
U+S Hydraulic Oil sealPU+NBR9*19*8
U+S Hydraulic Oil sealPU+NBR10*16*6
U+S Hydraulic Oil sealPU+NBR10*18*5.5
U+S Hydraulic Oil sealPU+NBR10*18*6
U+S Hydraulic Oil sealPU+NBR10*18*8
U+S Hydraulic Oil sealPU+NBR10*20*8
U+S Hydraulic Oil sealPU+NBR10*22*6
U+S Hydraulic Oil sealPU+NBR10*22*8
U+S Hydraulic Oil sealPU+NBR10*19.2*5
U+S Hydraulic Oil sealPU+NBR28*36*6
U+S Hydraulic Oil sealPU+NBR28*36*8
U+S Hydraulic Oil sealPU+NBR28*38*6
U+S Hydraulic Oil sealPU+NBR28*38*8
U+S Hydraulic Oil sealPU+NBR28*40*8
U+S Hydraulic Oil sealPU+NBR28*40*10
U+S Hydraulic Oil sealPU+NBR28*43*10
U+S Hydraulic Oil sealPU+NBR28*44*8
U+S Hydraulic Oil sealPU+NBR30*37*6
U+S Hydraulic Oil sealPU+NBR30*38*5
U+S Hydraulic Oil sealPU+NBR30*38*6
U+S Hydraulic Oil sealPU+NBR30*38*7

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