Sealing Excellence, Securing Industry

CFKS OUIS Oil Seal 40*30*6 Cylinder Piston Rod Seal Hydraulic Oil Seal

CFKS OUIS Oil Seal 40*30*6 is a polyurethane hydraulic rod seal designed for piston rods and cylinders. 40×30×6 This durable hydraulic oil seal delivers reliable sealing performance, reduced leakage, and long service life for industrial and construction machinery 40-30-6 .  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 OUIS Oil Seal  Packing 1 pc per bag

 

CFKS OUIS Oil Seal 40*30*6 is a high-performance hydraulic rod seal designed for use in hydraulic cylinders, piston rods, and industrial machinery. Manufactured from high-quality polyurethane, the OUIS Oil Seal provides excellent wear resistance, low friction, and extended service life in demanding working conditions. It effectively prevents internal oil leakage and ensures stable sealing performance.

This OUIS hydraulic oil seal is engineered for dynamic reciprocating motion, offering strong sealing ability even under high pressure and continuous operation. The optimized sealing lip enhances oil retention, reduces contamination ingress, and improves hydraulic cylinder reliability. It is widely used in construction machinery, hydraulic equipment, loaders, forklifts, presses, and manufacturing automation systems.

CFKS provides customized OUIS Oil Seal solutions covering various dimensions, hardness options, and material grades such as PU, NBR, and FKM to meet different industrial requirements. Our rod seals deliver outstanding stability and durability, helping reduce maintenance costs and improve operational efficiency for hydraulic machinery worldwide.

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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