Sealing Excellence, Securing Industry

CFKS Hydraulic Cylinder Machine PU NBR FKM Rubber DH Polyurethane DH Oil Seal Piston Seals

CFKS Guide Rings and Wear Rings are essential components for hydraulic cylinders, preventing metal-to-metal contact while guiding piston and rod movement. Available in fabric-resin composite and PTFE materials, they offer superior wear resistance and low friction for high-performance hydraulic systems.

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

 

1. Product Overview & Application
The DH Hydraulic Piston Seal is engineered for hydraulic cylinders and pneumatic machines where strong, reliable sealing is required under high working pressure. Its double-acting design allows effective sealing in both piston stroke directions, preventing leakage and maintaining system efficiency. Widely used in construction machinery, injection molding machines, hydraulic presses, and heavy-duty industrial equipment, DH Seals provide long-term reliability.

 

2. Material Composition & Performance
CFKS DH Seals are available in polyurethane (PU) for superior wear resistance, NBR rubber for excellent oil resistance, and FKM (Viton®) for high-temperature and chemical resistance. This material flexibility ensures compatibility with a wide range of hydraulic fluids and demanding working conditions. Reinforced profiles with optional PTFE or POM backup rings enhance stability and prevent extrusion under high pressure.

3. Key Features & Benefits

Double-acting piston seal design for effective sealing in both directions

Material options (PU, NBR, FKM) to meet different fluid and temperature requirements

High wear resistance & long service life in heavy-duty conditions

Excellent extrusion resistance with backup ring options

Suitable for hydraulic cylinders, pneumatic actuators, and industrial machinery

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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