DVS 4800 (impregnated with graphite and MoS2 lubricant) and DVS 5400 (impregnated with PTFE and silicone-free dynamic 'run-in' lubricant)
Characteristics:
- Simple installation
- Use without barrier fluid
- Maintenance-free
- Shaft protecting
- No adjusting of gland
- Re-pressurize in operation