Sealing Excellence, Securing Industry

CFKS Compact Piston Rod Seal Polyurethane DAS KDAS TPM Hydraulic Seal PU DAS Double Acting Sealing Composite

CFKS DAS/KDAS hydraulic seals are compact, double-acting sealing elements made from durable polyurethane (PU). Engineered for hydraulic piston and rod applications, they deliver excellent sealing performance under high pressure and dynamic motion.

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

 

✅ 1. High-Performance DAS Oil Seals for Compact Hydraulic Systems
The CFKS PU DAS oil seal is a compact, composite seal designed for double-acting pistons and rods in hydraulic systems. It consists of a main sealing lip, a secondary support lip, and often includes an integrated backup ring. This multi-lip design ensures stable sealing, compensates for wear, and minimizes leakage in high-pressure and reciprocating conditions.

 

✅ 2. Durable Polyurethane for Extended Seal Life
Manufactured using high-quality polyurethane (TPU/PU), CFKS DAS and K-DAS seals offer exceptional abrasion resistance, pressure endurance, and low compression set. These properties make them ideal for heavy-duty hydraulic cylinders used in construction machinery, mining equipment, and agricultural vehicles. With operating pressures up to 400 bar, they ensure reliable performance even in demanding environments.

✅ 3. Versatile Sealing for Piston and Rod Applications
CFKS provides DAS/KDAS seals in multiple standard sizes and materials (PU, NBR, PTFE) for compatibility with ISO standard grooves. These seals are widely used in OEM and replacement hydraulic cylinders across various industries. Whether for piston or rod sealing, the double-acting functionality makes them suitable for both directions of motion, improving system efficiency and reducing maintenance frequency.

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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