We have CNC machines and cooperate with universities and research institutions and have rubber material research and development team.
We established long-term cooperative relations of technology talents with Qingdao University of Science & Technology, Hebei University of Technology, northwest Rubber Institute, each batch on employee training, improve the staff technical level and cultural structure, creating a number of business elites. It lays a solid foundation for the healthy development of the company.
Product Description
Oil seals
Rubber Oil seals are also known as rotary shaft seals. They are often called grease, fluid or dirt seals. They close spaces between stationary and moving components in mechanical equipment. They are used to help prevent lubricant escape. Oil seals stop harmful contaminants from entering machinery, particularly in severe environments. They are vital components of almost every type of machine and vehicle in operation. They protect all types of precision-constructed, close-fitting ball, sleeve and roller bearings.
| Media |
Maximum temperature, depending on the materials |
| ACM |
AEM |
EPDM |
FKM |
HNBR |
NBR |
VMQ |
| Mineral oils |
Oils for motors |
+130°C |
+130°C |
- |
+170°C |
+130°C |
+100°C |
+150°C |
| Oils for gearboxes |
+120°C |
+130°C |
- |
+150°C |
+110°C |
+80°C |
+130°C |
| Oils for hypoid gears |
+120°C |
+130°C |
- |
+150°C |
+110°C |
+80°C |
- |
| ATF oils |
+120°C |
+130°C |
- |
+170°C |
+130°C |
+100°C |
- |
| Hydraulic oils |
+120°C |
+130°C |
|
+150°C |
+130°C |
+90°C |
- |
| Greases |
- |
+130°C |
- |
- |
+100°C |
+90°C |
- |
Fire-resistant
fluids |
HFA group - Emulsion with more than 80% water |
- |
- |
- |
- |
+70°C |
+70°C |
+60°C |
| HFB group - Opposite solution (water in oil) |
- |
- |
- |
- |
+70°C |
+70°C |
+60°C |
| HFC group - Polymer aqueous solution |
- |
- |
+60°C |
- |
+70°C |
+70°C |
- |
| HFD group - Water-free synthetic fluids |
- |
- |
- |
+150°C |
- |
- |
- |
| Other fluids |
EL + L heating oil |
- |
- |
- |
- |
+100°C |
+90°C |
- |
| Air |
+150°C |
+150°C |
+150°C |
+200°C |
+130°C |
+90°C |
+200°C |
| Water |
- |
- |
+150°C |
+100°C |
+100°C |
+90°C |
- |
| Water for washing |
- |
- |
+130°C |
+100°C |
+100°C |
+100°C |
- |
| Temperature range |
Min. |
-25°C |
-40°C |
-45°C |
-20°C |
-30°C |
-30°C |
-60°C |
| Max. |
+150°C |
+150°C |
+150°C |
+200°C |
+150°C |
+100°C |
+200°C |
Colours
The color can be customized according to customer's requirement.
Shaft and Bore Configurations
Shaft Material
Seals perform best on medium carbon steel or stainless steel shaft. Heat treatment or nitriding is especially recommended. To seal water at low surface velocities, stainless steel is more suitable.
The minimum hardness on the area where the sealing lip contacts the shaft should be 45 HRC. Where lubrications is doubtful, abrasive matter is present, or shaft speed is greater than 4m/sec, 55 HRC is preferred.
The shaft must be machined to the surface Roughness of Rt=1 to 4 micrometers (Ra=0.2 to 0.8 micrometers). In the areas of the contact surface, any rifling marks are not permitted.
Shaft Tolerance
| Nominal Shaft Diameter |
Tolerance |
| up to 4.000 |
+/- 0.003 |
| over 4.000 to 6.000 |
+/- 0.004 |
| over 6.000 to 10.000 |
+/- 0.005 |
| over 10.000 |
+/- 0.006 |
| Shaft Material and Hardness |
|
|
| Condition |
Material |
Hardness |
| General |
Carbon steel(Heat treatment or nitriding is especially recommended) |
45 HRC min. |
| For sealing water with low surface velocity |
Stainless steel |
55 HRC min. |
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