Huahao Sealing · Carbon Graphite Components
Huahao Sealing supplies carbon graphite piston rings, packing seal rings and bearings for compressors — reciprocating, screw and centrifugal types. Carbon graphite self-lubrication enables oil-free operation for process gas, air, natural gas, hydrogen and CO₂ dry sealing service; rated 25 MPa pressure and 350°C temperature, paired with SiC mating face for high-speed wear resistance.
Process gas compressors demand oil-free operation; conventional metallic piston rings and packing require oil lubrication that contaminates process gas and downstream products
Reciprocating compressor piston rods suffer severe high-pressure dry friction wear; metallic packing rings have short life and require frequent shutdown for replacement
Natural gas and synthesis gas contain corrosive H₂S and CO₂; metallic seals suffer chemical corrosion and stress corrosion cracking
Centrifugal compressor high-speed dry gas seal faces suffer dry friction heat; standard materials experience thermal cracking and rapid wear
Carbon graphite self-lubricating piston rings and packing rings enable oil-free operation, completely eliminating process gas oil contamination for oil-lubricated compressors
Antimony-impregnated graphite grade (M106H) rated 500°C provides long wear life under high-pressure dry friction, reducing shutdowns
Carbonized graphite grade (M191T) with chemical inertness resists H₂S and CO₂ corrosion, with no stress corrosion cracking risk
Carbon graphite paired with SiC mating face for centrifugal dry gas seals provides high thermal conductivity heat dissipation, preventing high-speed dry friction thermal cracking
| Pressure | ≤ 25 MPa |
| Temperature | -40°C ~ 350°C |
| Speed | ≤ 25 m/s |
| Media | Air, N₂, H₂, natural gas, CO₂, H₂S |
| Grade | M106H (Sb) / M191T (Carbonized) / M106K (Resin) |
| Lubrication | Oil-free self-lubricating |
Carbon graphite self-lubrication enables oil-free operation, completely eliminating lube oil contamination of process gas. Paired with cylinder or SiC sleeve, dry friction wear rate is low, extending piston ring replacement cycles to 12-18 months — ideal for oil-free compressors.
M106H antimony-impregnated grade is recommended, rated 500°C with high compressive strength and long wear life under high-pressure dry friction. Paired with SiC or hard chrome plated piston rod, seal life reaches 12-18 months.
No. Carbonized grade (M191T) has strong chemical inertness, resisting H₂S and CO₂ corrosion with no stress corrosion cracking risk. Carbon graphite is non-metallic, with no galvanic corrosion — suited for sour natural gas service.
Carbon graphite paired with SiC mating face is the standard combination for dry gas seals. SiC high thermal conductivity dissipates heat, preventing high-speed dry friction thermal cracking; carbon graphite self-lubrication lowers friction coefficient for high-speed dry gas service.
