Sealing Excellence, Securing Industry

CFKS Hydraulic PU DKB Seal 30*42*6/9 Dust Lip DKB Rod Oil Seal with Wiper

CFKS hydraulic PU 30-42-6/9 DKB seal 30 42 6/9 is a high-performance DKB rod oil seal 30*42*6/9 with integrated dust lip and wiper. Made from durable polyurethane, this hydraulic seal 30×42×6/9 provides excellent wear resistance, reliable oil retention, and effective protection against dust and contaminants. Commonly used in hydraulic cylinders and construction machinery, it ensures stable sealing performance and long service life in demanding environments. 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 DKB Oil Seal  Packing 1 pc per bag

 

The CFKS hydraulic PU DKB seal 30*42*6/9 is a high-performance DKB rod oil seal designed for hydraulic cylinder rod sealing applications. Featuring an integrated dust lip, this DKB seal provides effective oil sealing while preventing dust, dirt, and contaminants from entering the system.

Manufactured from premium polyurethane (PU), this hydraulic DKB seal offers excellent wear resistance, high pressure capability, and low friction during dynamic operation. The combined oil sealing lip and wiper lip design ensures reliable sealing performance and extended service life in harsh working environments.

CFKS DKB rod oil seals are widely used in hydraulic cylinders, construction machinery, excavators, and industrial equipment. With precise dimensions and durable PU material, this DKB seal with wiper delivers stable sealing performance, reduced leakage, and improved protection for hydraulic systems.

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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