Type 83
The Type 83 is a dual-segmented carbon bushing assembly designed to prevent bearing oil migration to dry gas seals. Typically used in a double arrangement with an inert buffer gas, it ensures complete separation of bearing oil and process gas when paired with Type 28 dry-running gas seals, providing a reliable sealing system for compressors.
| Feature | Specification |
|---|---|
| Seal Type | Double separation seal (also available as individual carbon rings) |
| Design | Dual-segmented carbon bushing assembly with self-adjusting hydropads and axial springs |
| Temperature Range | -20°F to 400°F (-30°C to 200°C) |
| Operating Pressure Range | 3 to 15 psig (0.2 to 1.0 bar gauge) |
| Normal Separation Gas Supply Pressure | 5 to 7 psi (0.3 to 0.5 bar) |
| Speed Limit | Up to 430 fps (130 m/s) |
| Shaft Diameter Range | 0.41 inch to 14.76 inch (40 mm to 375 mm) |
| Separation Gas | Nitrogen, air (dry and clean, filtered to 3 microns, dew point down to -90°C) |
| Vibration Compliance | Meets API 617 vibration levels |
| Materials of Construction |
- Bushing Segments: Carbon - Axial Spring: Stainless Steel - Radial Springs: Stainless Steel - Housing Assembly: Stainless Steel - Clamp Plate Assembly: Stainless Steel - Secondary Sealing Elements: Fluoroelastomer |
| Design Features |
- Cartridge design for easy installation - Universal design independent of shaft rotation - Unique carbon bushing segments with self-adjusting hydro pads - Specially designed segments minimize separation gas consumption and oil migration - Unique axial spring accommodates shaft excursions - Biased flow path to reduce bearing oil migration |