CFKS Stainless Steel Shaft Seal PTFE 8*18*6 Stainless Steel Housing for Rotary Screw Air Compressor
The CFKS 8*18*6 PTFE Stainless Steel Oil Seal is a high-performance solution engineered for rotary screw air compressors. Featuring a durable stainless steel housing and a precision-molded PTFE sealing lip, this PTFE stainless steel oil seal provides exceptional resistance to high temperatures, pressures, and aggressive lubricants. Its low-friction design minimizes shaft wear and energy loss, making it the ideal choice for industrial compressors requiring reliable, leak-free operation and extended maintenance intervals. Find your sealing solution with CFKS — contact us for a quote.
Product Categories
Recent Posts
- CFKS Expert Hydraulic Seals: Precision Sealing Solutions for Demanding Applications
- CFKS Deepens Industry Expertise with High-Performance Washing Machine Seals
- Understanding Bonded Seals: Structure, Function, and Applications
- CFKS Expands Its Hydraulic Sealing Portfolio with High-Performance TG Oil Seals for Rotary Shaft Applications
- CFKS Launches High-Performance Combi Oil Seals for Demanding Industrial Applications
| Brand Name | CFKS | OEM | Accpetable |
|---|---|---|---|
| Material | NBR FKM Silicone | Features | wear resistance |
| Dimensions | Customized | Certificate | ISO9001/TS16949 |
| Type | Stainless Steel Oil Seal | Packing | 1 pc per bag |
The CFKS 8*18*6 PTFE Stainless Steel Oil Seal is specifically designed to meet the rigorous demands of rotary screw air compressors. Standard rubber seals often fail under the intense heat and high rotational speeds characteristic of compressor air-ends. By utilizing an advanced PTFE (Polytetrafluoroethylene) sealing lip, this seal maintains its structural integrity at temperatures ranging from $-70°C$ to $+260°C$. The unique “memory” property of the PTFE lip ensures a consistent, tight seal against the shaft, effectively preventing oil migration and ensuring the delivery of clean, compressed air.

Constructed with a premium stainless steel housing (available in SUS304 or SUS316), this shaft seal offers unparalleled corrosion resistance and mechanical stability. The rigid metal casing is designed for a precise press-fit into the compressor housing, preventing any bypass leakage even under fluctuating internal pressures. Unlike conventional seals that rely on a metal spring, the PTFE stainless steel oil seal uses the inherent elasticity of the modified PTFE lip to provide radial force. This reduces the risk of spring displacement and eliminates the possibility of spring-related shaft scoring, significantly extending the life of both the seal and the rotor shaft.

Efficiency is critical in modern compressed air systems, and the CFKS PTFE Stainless Steel Oil Seal contributes by offering a significantly lower coefficient of friction compared to NBR or Viton alternatives. This reduction in friction results in lower energy consumption and less heat generation at the sealing interface. Whether applied in oil-injected or oil-free rotary screw air compressors, our PTFE stainless steel oil seal provides a robust barrier against leakage. By choosing CFKS, manufacturers and repair technicians can reduce downtime and lower total cost of ownership through superior sealing technology and industrial-grade material selection.


Frequently Asked Questions (FAQ)
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.
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.
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.
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 | ||
| Stainless Steel Oil Seal Size List | ||
| SIZE | Material | Product |
| 8*18*6 | Metal Housing | PTFE Stainless Steel Oil Seal |
| 10*20*7 | Metal Housing | PTFE Stainless Steel Oil Seal |
| 10*20*5 | Metal Housing | PTFE Stainless Steel Oil Seal |
| 10*22*7 | Metal Housing | PTFE Stainless Steel Oil Seal |
| 8*22*7 | Metal Housing | PTFE Stainless Steel Oil Seal |
| 8*22*8 | Metal Housing | PTFE Stainless Steel Oil Seal |
| 10*22*7 | Metal Housing | PTFE Stainless Steel Oil Seal |
| 12*22*6 | Metal Housing | PTFE Stainless Steel Oil Seal |
| 12*25*7 | Metal Housing | PTFE Stainless Steel Oil Seal |
| 10*25*7 | Metal Housing | PTFE Stainless Steel Oil Seal |
| 14*25*5 | Metal Housing | PTFE Stainless Steel Oil Seal |
| 15*25*7 | Metal Housing | PTFE Stainless Steel Oil Seal |
| 10*26*7 | Metal Housing | PTFE Stainless Steel Oil Seal |
| 15*26*7 | Metal Housing | PTFE Stainless Steel Oil Seal |
| 14*24.1*6 | Metal Housing | PTFE Stainless Steel Oil Seal |
| 16.5*27*7 | Metal Housing | PTFE Stainless Steel Oil Seal |
| 18*35*10 | Metal Housing | PTFE Stainless Steel Oil Seal |
| 20*35*7 | Metal Housing | PTFE Stainless Steel Oil Seal |
| 20*35*8 | Metal Housing | PTFE Stainless Steel Oil Seal |
| 22*35*4 | Metal Housing | PTFE Stainless Steel Oil Seal |
| 22*35*5 | Metal Housing | PTFE Stainless Steel Oil Seal |
| 22*35*7 | Metal Housing | PTFE Stainless Steel Oil Seal |
| 22*35*8 | Metal Housing | PTFE Stainless Steel Oil Seal |
| 22*35*9 | Metal Housing | PTFE Stainless Steel Oil Seal |
| 22*35*10 | Metal Housing | PTFE Stainless Steel Oil Seal |
| 25*35*7 | Metal Housing | PTFE Stainless Steel Oil Seal |
| 25*35*8 | Metal Housing | PTFE Stainless Steel Oil Seal |
| 25*35*10 | Metal Housing | PTFE Stainless Steel Oil Seal |
| 25*36*7 | Metal Housing | PTFE Stainless Steel Oil Seal |
| 25*37*7 | Metal Housing | PTFE Stainless Steel Oil Seal |
| 25*38*4.5 | Metal Housing | PTFE Stainless Steel Oil Seal |
| 25*38*7 | Metal Housing | PTFE Stainless Steel Oil Seal |
| 85*110*13 | Metal Housing | PTFE Stainless Steel Oil Seal |
| 85*110*14 | Metal Housing | PTFE Stainless Steel Oil Seal |
| 88*110*12 | Metal Housing | PTFE Stainless Steel Oil Seal |
| 90*110*8 | Metal Housing | PTFE Stainless Steel Oil Seal |
| 90*110*10 | Metal Housing | PTFE Stainless Steel Oil Seal |
| 90*110*12 | Metal Housing | PTFE Stainless Steel Oil Seal |
| 90*110*14 | Metal Housing | PTFE Stainless Steel Oil Seal |
| 92*110*8 | Metal Housing | PTFE Stainless Steel Oil Seal |
| 92*110*10 | Metal Housing | PTFE Stainless Steel Oil Seal |
| 92*110*12 | Metal Housing | PTFE Stainless Steel Oil Seal |
| 95*110*8 | Metal Housing | PTFE Stainless Steel Oil Seal |
| 95*110*10 | Metal Housing | PTFE Stainless Steel Oil Seal |
| 95*110*12 | Metal Housing | PTFE Stainless Steel Oil Seal |
| 87*112*12 | Metal Housing | PTFE Stainless Steel Oil Seal |
| 80*115*10 | Metal Housing | PTFE Stainless Steel Oil Seal |
| 125*160*12 | Metal Housing | PTFE Stainless Steel Oil Seal |
| 125*160*15 | Metal Housing | PTFE Stainless Steel Oil Seal |
| 130*160*10 | Metal Housing | PTFE Stainless Steel Oil Seal |
| 130*160*12 | Metal Housing | PTFE Stainless Steel Oil Seal |
| 130*160*14 | Metal Housing | PTFE Stainless Steel Oil Seal |
| 135*160*12 | Metal Housing | PTFE Stainless Steel Oil Seal |
| 130*165*12 | Metal Housing | PTFE Stainless Steel Oil Seal |
| 135*160*14 | Metal Housing | PTFE Stainless Steel Oil Seal |






.jpg)



