Sealing Excellence, Securing Industry

CFKS BS 40*50*7.3 Oil Seal PU Hydraulic BS Oil Seal Piston Rod Seal

High-quality BS 40×50×7.3 PU Hydraulic Oil Seal designed for piston rod sealing in professional hydraulic cylinders. 40-50-7.3 This BS Oil Seal provides strong wear resistance, stable sealing performance and excellent oil and pressure resistance, ideal for construction machinery, industrial systems and heavy equipment 40*50*7.3 .  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 BS Oil Seal  Packing 1 pc per bag

 

The BS 40*50*7.3 Oil Seal is a high-performance polyurethane hydraulic rod seal designed for cylinders requiring reliable sealing under high pressure and fast reciprocating movement. Manufactured from premium PU, this BS Oil Seal offers excellent sealing integrity and extended service life.

The PU hydraulic BS oil seal provides outstanding wear resistance, low friction, and strong oil and pressure resistance, making it ideal for industrial hydraulic systems, construction machinery, and lifting equipment. The springless BS structure ensures smooth rod movement while preventing oil leakage and ensuring stable performance in demanding environments.

This BS piston rod seal is suitable for hydraulic cylinders, forklift systems, mining equipment, agricultural machinery, loaders and injection molding machines. Custom dimensions, materials and colors are available to meet OEM and aftermarket requirements for hydraulic seal replacements and professional maintenance needs.

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
BS Seal Size List
TypeMaterialSIZE
BS Hydraulic Oil sealPU12*20*6
BS Hydraulic Oil sealPU14*22*6
BS Hydraulic Oil sealPU16*22*5
BS Hydraulic Oil sealPU18*24*5
BS Hydraulic Oil sealPU18*25*5
BS Hydraulic Oil sealPU18*25*8
BS Hydraulic Oil sealPU18*26*5.7
BS Hydraulic Oil sealPU18*28*7.3
BS Hydraulic Oil sealPU18*28*8
BS Hydraulic Oil sealPU20*26*5
BS Hydraulic Oil sealPU20*28*5
BS Hydraulic Oil sealPU20*28*5.7
BS Hydraulic Oil sealPU20*28*6
BS Hydraulic Oil sealPU20*30*6
BS Hydraulic Oil sealPU20*30*7.3
BS Hydraulic Oil sealPU20*30*8
BS Hydraulic Oil sealPU20*30*10
BS Hydraulic Oil sealPU22*28*6
BS Hydraulic Oil sealPU22*30*5
BS Hydraulic Oil sealPU22*30*5.7
BS Hydraulic Oil sealPU22*30*6
BS Hydraulic Oil sealPU22*30*8
BS Hydraulic Oil sealPU22*32*7.3
BS Hydraulic Oil sealPU22*32*8
BS Hydraulic Oil sealPU25*33*5
BS Hydraulic Oil sealPU25*33*5.7
BS Hydraulic Oil sealPU25*33*6
BS Hydraulic Oil sealPU56*66*7.3
BS Hydraulic Oil sealPU56*71*11.4
BS Hydraulic Oil sealPU56*76*12
BS Hydraulic Oil sealPU58*68*7.3
BS Hydraulic Oil sealPU60*70*6
BS Hydraulic Oil sealPU60*70*7.3
BS Hydraulic Oil sealPU60*70*7.5
BS Hydraulic Oil sealPU60*70*10
BS Hydraulic Oil sealPU60*70*11.8
BS Hydraulic Oil sealPU60*71*7
BS Hydraulic Oil sealPU60*73*10
BS Hydraulic Oil sealPU60*75*9

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