Mechanical seal john crane
Type 83
Separation Seal (Contacting Technology)Type 83
The Type 83 is a dual-segmented carbon bushing assembly designed to prevent the migration of bearing oil to the dry gas seal cartridge. Normally applied as a double arrangement with an inert buffer gas. When used in conjunction with the Type 28 dry-running gas seal, it provides a total sealing system that ensures separation of bearing oil and process gas in compressors.
Product Description Type 83
The Type 83 is a contacting carbon bushing designed to isolate the bearing oil from the dry gas seal cartridge.
- Normally supplied as a complete seal cartridge, unique inner and outer segments are specifically designed to prevent oil migration and minimize wear.
- Nitrogen is normally injected between the two segmented bushings effectively creating a pressure barrier between the bearing and DGS cavity.
- Advanced materials and design ensure minimal wear and promote long life. Unlike many contacting separation seals the Type 83 is designed to operate on cryogenically dry nitrogen.
Table Parameters Type 83
| Temperature Limits | -20°F to 400°F/-30°C to 200°C
|
|---|---|
| Pressure Limits | 3 to 15 psi(g)/0.2 to 1.0 bar(g)
|
| Speed Limits | 430fps/130m/s
|
| Size Limits | 40mm to 375mm, with sleeve to fit all metric or imperial shafts |
Features Type 83
- California Residents: PROPOSITION 65 WARNING
- Low buffer gas consumption.
- Low wear for longer life and improved reliability.
- Cartridge design for easy installation.
- Universal design independent of shaft rotation.
- Unique carbon bushing segment design with self-adjusting hydropads.
- Incorporates biased flow path to further reduce the risk of bearing oil migration.
- Specially designed joint between the carbon bushing segments to minimize buffer consumption and bearing oil migration.
- Unique axial spring design accommodates shaft excursions.
Recommended Applications Type 83
- Centrifugal compressors
- Other compressors