Seal with controllable pump rate
- Publisher
- Elsevier Science
- Year
- 2008
- Tongue
- English
- Weight
- 152 KB
- Volume
- 2008
- Category
- Article
- ISSN
- 1350-4789
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## Long history John Crane developed first non-contacting, dry-running gas seal 30 years ago, according to Hosanna. He says that since then the Type 28 seals have been used in thousands of applications around the world. Many of the seals have been performing for 10 years or more.
This patent describes a seal for the boot of a CV rotary joint. A series of axial fingers from the joint can energize the seal lip to open the seal during rotation, to allow venting of the joint.
## Dynamic sealing The seals are suitable for speeds up to 3600 rpm at a maximum pr-~caware of 400 psig (2760 kpa) and a temperature of 215ยฐC (400ยฐ10.