Huahao Sealing · Carbon Graphite Components
Huahao Sealing provides carbon graphite seal rings, bearings and thrust discs for power generation — circulating water pumps, turbine lube oil pumps, nuclear auxiliary pumps and CHP heat supply pumps. High-temp steam service (≤600°C), self-lubrication for dry running during oil pump failure, large-size bearings for 120mm+ shaft pumps, extending overhaul cycles beyond 15 months.
Power plant circulating water pumps with large shafts (120mm+) at high speed; metallic bearings suffer friction heat buildup and rapid wear
Turbine lube oil pumps operate at 200-300°C; seals suffer high-temp elasticity loss and oxidation
Circulating water carries silt particles; metallic bearings suffer severe abrasive wear with monthly maintenance shutdowns
High-temperature zones require oil-free operation; lube oil leakage creates high fire risk
Large-size carbon graphite bearings (58B series custom) rated 250°C, solid lubrication independent of fluid lubricant film
Antimony-impregnated graphite grade (M106H) rated 500°C, anti-oxidation treatment for high-temp steam environments
Carbon graphite self-lubrication tolerates short-term dry running during lube oil pump failure, gaining emergency shutdown time
Large-shaft optimized length-to-diameter ratio improves heat dissipation; bore micro-taper compensates for temperature-gradient deformation
| Temperature | 0°C ~ 600°C |
| Pressure | ≤ 16 MPa |
| Speed | ≤ 20 m/s |
| Shaft Diameter | up to 120mm+ |
| Media | Cooling water, steam, thermal oil |
| Grade | M106H (Sb) / 58B Custom |
58B series large-size carbon graphite bearings custom-made, rated 250°C, solid lubrication without fluid film. Optimized length-to-diameter ratio for large shafts improves heat dissipation; bore micro-taper compensates for temperature-gradient deformation.
M106H antimony-impregnated graphite grade rated 500°C with anti-oxidation treatment. 300°C is well within limits for stable long-term performance. Self-lubrication also enables short-term dry running during lube pump failure.
Power plant high-temp zones (near boiler, turbine) have strict fire safety requirements; lube oil leakage contacting hot surfaces easily causes fire. Carbon graphite self-lubrication eliminates external grease, removing fire risk at the source.
Select M106H antimony grade with high hardness to resist particle wear. Bearing clearance is optimized to allow particles to pass without seizure. One plant retrofit achieved 15 months continuous operation, reducing annual downtime by 720 hours.
Submit your duty parameters — our engineers reply with grade selection and quotation within 24 hours.
