Description
The seal group consists of two identical metal rings and two rubber rings. Its working principle is that a pair of rubber rings form a closed space with the cavity (but not in contact with the shaft) under the support of the metal rings. When the metal rings rotate, The two ground surfaces fit closely and slide relative to each other. On the one hand, they ensure good operation. On the other hand, they effectively isolate dust, water, sludge, etc. from the outside and protect the internal lubricating grease from leaking.
At Decent Machinery, we provide duo cone seals made of by using high standards in the industry. The main component of the metal ring is FC15Cr3Mo. Its hardness after heat treatment generally reaches HRC 65-72.
Rubber Ring Materials:
- The right rubber ring should be chosen to meet the specific application requirements.
- The most common rubber ring materials are NBR and silicone.
The table listed below gives a brief comparison between available rubber rings for reference.
| Feature | NBR | LTNBR | HNBR | Silicone | Viton |
| Lowest Temperature | -25°C | -45°C | -40°C | -55°C | -10°C |
| Hightest Temperature | +110°C | +115°C | +135°C | +165°C | +180°C |
| Tensile Strength | Good | Good | Good | Poor | Good |
| Abrasion Resistance | Excellent | Excellent | Excellent | Poor | Good |
| Oil Resistance | Excellent | Excellent | Excellent | poor | Excellent |
| Cost | Low | Low | Medium | Medium | High |
Seal group can be divided into DO, DF, and XY types according to its structure, of which DO type is the most commonly used model. At Decent Machinery,we are able to supply an extensive range of seal groups of all types to meet our clients’ unique applications . Even if those applications can’t be met with a regular product , then we will custom design for you.
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