Type 93LR
The Type 93LR features a balanced lift-off carbon design and non-contacting segmented bushing seal, using minimal gas for pressure and flow regulation. Ideal for petrochemical and oil & gas sectors, it creates a pressure barrier between the bearing and dry gas seal cavity using separation gas. Easily retrofitted to existing John Crane seals, it promotes long service life with advanced materials that reduce wear.
| Feature | Specification |
|---|---|
| Seal Type | Non-contacting segmented lift-off carbon bushing seal |
| Function | Separation seal to prevent bearing oil ingress into dry gas seal cavity |
| Applications | Centrifugal compressors, mission-critical rotating equipment in oil & gas and petrochemical industries |
| Materials | Carbon (bushing segments), stainless steel (axial and radial springs), 410 stainless steel (housing, clamp plate), fluoroelastomer (secondary seals) |
| Size Range | 40 mm to 300 mm (1.57 inch to 11.81 inch) with sleeves to fit all imperial or metric shafts |
| Temperature Limits | -50°C to 200°C (-58°F to 392°F) |
| Speed Limits | Up to 130 m/s (430 fps) |
| Pressure Range | Design pressure: 0.1 to 5 bar (1.5 to 72.5 psi) |
| Separation Gas Operating Differential Pressure | 0.1 to 0.5 bar (1.5 to 7.3 psi) |
| Maximum Sealing Integrity | 35 bar (508 psi) |
| Separation Gas Types | Nitrogen, air |
| Key Features |
- Balanced lift-off carbon ring minimizes gas consumption in pressure and flow control modes - Self-centralising grooves for dynamic seal concentricity - Patented segmented joint design reduces oil migration and seal leakage - Static restriction to oil ingress when separation gas is off - Temperature-independent gas consumption - Suitable for slow roll conditions - Bi-directional design |
| Compliance | Meets API 692 standard; vibration levels comply with API 617 and ISO 7919-3 |