Sealing Excellence, Securing Industry

CFKS FKM Water Pump Seal 18*35*7 NBR Water Rubber Seal for Industrial Pump

This high-performance rotary shaft seal is specifically engineered to maintain a hermetic barrier in demanding industrial pumping environments, balancing low friction with maximum fluid containment.

  • Dual-Material Availability: Offered in both NBR for general oil resistance and FKM for extreme chemical/thermal stability.

  • Precision Dimensions: Standard 18*35*7 geometry ensures a seamless press-fit installation for most centrifugal pumps.

  • Dynamic Sealing Lip: Features a reinforced sealing edge designed to withstand centrifugal forces and axial shaft movements.

Find your sealing solution with CFKS — contact us for a quote.

Parameter Value Parameter Value
Product Name CFKS Water Pump Seal Specification 18*35*7
Material NBR / FKM / PU Feature High Pressure & Wear Resistance
Work Temp. -20℃ to 220℃ Usage Impellers, Electric Motors, Gearboxes, Centrifugal Pumps, Agitators
Hardness 70-90 Shore A Type Rotary Oil Seal / VA / TC

 

The VA-style and standard rotary configurations of these pump seals leverage axial tension to create a constant sealing force against the counterface. By utilizing the elastomer’s natural elasticity, the seal compensates for minor shaft misalignments and axial run-out. As the pump rotates, the lip design manages the lubrication film thickness, significantly reducing heat generation while preventing the ingress of contaminants such as dust or water splash.

Material integrity is the cornerstone of seal longevity. Our NBR compounds are the industry standard for hydraulic oils and water-based fluids up to 100°C. For aggressive chemical media or high-temperature environments, we utilize premium FKM. FKM provides superior resistance to oxidation, ozone, and petroleum-based lubricants, maintaining its mechanical properties even when exposed to temperatures exceeding 200°C, thereby preventing premature hardening and cracking.

Designed for the pragmatic engineer, these seals prioritize ease of maintenance. The flexible elastomer body allows for straightforward installation without the risk of damaging the shaft surface. Due to the high-grade finish and low-friction coefficient of the sealing lip, these components offer an extended service life with minimal wear on the sleeve. This “fit-and-forget” reliability reduces unplanned downtime and lowers the total cost of ownership for industrial fluid systems.

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
High Pressure Water Seal Size List
TypeSIZETypeSIZE
v type18*30*5.5U type15*22*5
v type18*28*5.5U type15*24*5
v type18*32*6U type18*26*5
v type20*32*5.5U type18*28*6
v type20*28*5.5U type20*28*5.7
v type22*28*5.5U type20*30*6
v type16*24*5.5U type28*36*5.9
v type15*25*5.5U type28*38*5.9
v type18*35*7U type22*30*6
v type14*26*5U type12*20*5
v type22*32*.5U type14*22*5
v type18*26*5.5U type18*24
v type20*35*5.5U type25*37*6.4
v type18*35*7U type13*20*5
v type18*32*7U type14*20*5
v type20*30*6U type16*24*5.5
v type20*35*7U type18*25*5
v type18*30*6U type20*35*6
v type24*35*6U type24*34*6
v type15*28*5U type18*25*5
v type18*32*5.5U type18*28*6
v type12*20*5U type18*26*6
v type12*22*5.5U type22*32*5.5
v type18*32*7.1U type18*26*5

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