Sealing Excellence, Securing Industry

CFKS DAS Compact Seal 20*11*17.7 Hydraulic Piston KDAS Oil Seal

High-performance CFKS DAS Oil Seal (20x11x17.7). This KDAS Hydraulic Piston Seal is a premium 5-piece compact seal set designed for double-acting cylinders. It combines excellent sealing, anti-extrusion, and guiding functions to ensure long-lasting hydraulic efficiency and prevent leaks in demanding industrial applications. 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 DAS Seal   Packing 1 pc per bag

 

The CFKS DAS Oil Seal (20x11x17.7), also widely known as a KDAS or Compact Seal, features a sophisticated five-piece integrated structure. It consists of a central elastomeric sealing element, two hard plastic back-up rings to prevent extrusion under high pressure, and two wear-resistant guide rings. This all-in-one Hydraulic Piston Seal design simplifies installation and provides a space-saving solution for double-acting hydraulic cylinders, ensuring a tight seal even in heavy-duty environments.

Precision-engineered for performance, our DAS Oil Seal excels at maintaining system pressure and preventing fluid leakage across the piston. The integrated guide rings (Wear Rings) in this KDAS assembly handle radial loads and prevent metal-to-metal contact between the piston and the cylinder bore. This dual-acting Piston Seal Ring is manufactured from high-quality NBR and POM materials, offering excellent resistance to friction, heat, and hydraulic fluids, which significantly extends the service life of your equipment.

The CFKS DAS Compact Seal 20x11x17.7 is the ideal choice for modern hydraulic machinery, including earthmoving equipment, forklifts, and industrial presses. By choosing this specialized Hydraulic Piston Seal, you benefit from reduced friction and minimized downtime. Whether you are replacing an OEM part or upgrading your hydraulic system, our DAS Oil Seal provides the reliability and precision fitment required to maintain peak operational efficiency in any fluid power application.

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.

CFKS Seal Manufacturing Co., Ltd.
https://cfksseals.com/
 Email: cfksnacy@gmail.com  Mobile/WhatsApp/Wechat: (86) 188-3097-5917
DAS/KDAS Size List
Type SIZE
DAS/KDAS Combination Seal 20*11*17.7
DAS/KDAS Combination Seal 22*13*17.7
DAS/KDAS Combination Seal 25*15*20.5
DAS/KDAS Combination Seal 25*15/1*29.1
DAS/KDAS Combination Seal 25*16*17.7
DAS/KDAS Combination Seal 28*19*17.7
DAS/KDAS Combination Seal 30*21*17.7
DAS/KDAS Combination Seal 32*22/1*20.7
DAS/KDAS Combination Seal 32*22*29.1
DAS/KDAS Combination Seal 32*24*21.9
DAS/KDAS Combination Seal 35*25/1*20.7
DAS/KDAS Combination Seal 35*25*29.1
DAS/KDAS Combination Seal 40*24*31.1
DAS/KDAS Combination Seal 40*26*20.7
DAS/KDAS Combination Seal 40*30*29.1
DAS/KDAS Combination Seal 40*30/1*20.5-
DAS/KDAS Combination Seal 40*30/2*20.5+
DAS/KDAS Combination Seal 42*28*20.7
DAS/KDAS Combination Seal 45*29*31.1
DAS/KDAS Combination Seal 45*31*20.7
DAS/KDAS Combination Seal 45*35*29.1
DAS/KDAS Combination Seal 50*34/1*26.7
DAS/KDAS Combination Seal 50*34*31.1
DAS/KDAS Combination Seal 160*135*44.4
DAS/KDAS Combination Seal 160*143*40.9
DAS/KDAS Combination Seal 160*138*36.7
DAS/KDAS Combination Seal 165*140*44.4
DAS/KDAS Combination Seal 170*145*50.8
DAS/KDAS Combination Seal 175*150*50.8
DAS/KDAS Combination Seal 180*155*50.8
DAS/KDAS Combination Seal 180*150*48.1
DAS/KDAS Combination Seal 185*160*50.8
DAS/KDAS Combination Seal 190*165*50.8
DAS/KDAS Combination Seal 195*170*50.8
DAS/KDAS Combination Seal 200*175*50.8
DAS/KDAS Combination Seal 210*185*50.8
DAS/KDAS Combination Seal 220*190*48.1
DAS/KDAS Combination Seal 220*195*50.8
DAS/KDAS Combination Seal 230*205*50.8
DAS/KDAS Combination Seal 240*215*50.8
DAS/KDAS Combination Seal 250*225*50.8
DAS/KDAS Combination Seal 250*220*48.1
DAS/KDAS Combination Seal 260*235*60.5
DAS/KDAS Combination Seal 275*250*48.3
 

MESSAGE

Go to Top