Sealing Excellence, Securing Industry

CFKS FKM DK Piston Rod Seal 32*8*15 Double Acting Piston Seal DK Pneumatic Oil Seal

The CFKS DK Oil Seal 32*8*15 is a premium double-acting piston seal designed specifically for pneumatic cylinders. Engineered with a symmetrical profile and high-grade elastomers, it provides a reliable secondary sealing effect and reduces friction-induced wear during high-frequency cycles.

  • Integrated Metal Base: Ensures a secure press-fit within the piston groove, preventing seal displacement.

  • Dual-Lip Geometry: Optimized for both static and dynamic sealing to maintain constant system pressure.

  • FKM Fluorocarbon Grade: Exceptional resistance against aggressive lubricants and high ambient temperatures.

  • Find your sealing solution with CFKS — contact us for a quote.
Parameter Detail Parameter Detail
Product Name DK Piston Rod Seal Specification 32*8*15
Material FKM  Feature High-Pressure & Wear Resistance
Work Temp. -20℃ to 220℃ Usage Air Cylinders, Valves, Actuators, Industrial Pumps, Automation Lines
Hardness 75 – 80 Shore A Type Double-Acting Pneumatic Seal

 

The DK pneumatic seal operates as a complete piston assembly, utilizing a double-acting design that manages pressure from both directions. Unlike standard V-rings, this profile integrates a vulcanized metal disc that provides structural rigidity. As the piston undergoes axial rotation and linear travel, the specialized sealing lips utilize the system’s air pressure to increase contact force against the cylinder wall, ensuring a tight seal even during rapid direction changes.

 

 

Material integrity is the cornerstone of seal longevity. While NBR is the industry standard for general pneumatic applications (up to 100°C), our FKM variant is indispensable for heavy-duty industrial environments. FKM offers superior chemical stability when exposed to synthetic lubricants and high-temperature spikes (up to 220°C). This material prevents hardening and cracking, which are the primary causes of seal failure in continuous-duty cycles, significantly extending the Mean Time Between Maintenance.

 

One of the distinct advantages of the DK profile is its straightforward installation process. The design allows for a secure fit into the piston housing without the need for complex multi-part assembly. For maintenance professionals, the low-friction coefficient of the FKM material translates to reduced heat generation. This leads to a “long-life” service interval, minimizing downtime and ensuring that the pneumatic actuators maintain consistent torque and speed throughout their lifecycle.

 

 

 

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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