Beiyang Industrial Area, Shangpan Town, Linhai City, Zhejiang, China 317015
  • Booth: 5636

Dongxin Seals Co., Ltd. was established in 1986 and is a professional manufacturer specializing in developing and producing silicon-carbide, carbon-graphite, hot-pressed graphite and correlative seal subassemblies.From our production base in Taizhou Zhejiang province, Dongxin has dedicated over 500 full time staff and 80,000 square meters of production, testing and research area.

 Press Releases

  • Dongxin Group established in 1986, registered Capital 1.1 billion RMB in Wenzhou. Now there are three locations including China Wenzhou, China Taizhou and UK Andover,Hampshire. Dongxin Group produce approximately 4000 different designs per month and average batch size 30 to 50 off. Maximum OD of ring reaches to 600mm. Dongxin owns the factory of 80000 square meters and there are 300 plus active customers all around the world. 


  • Sintered Silicon Carbide
    Strong Acid or Alkali Medium
    High Temperature Resistance
    High Wear Resistance...

  • Reaction Bonded Silicon Carbide (RBSiC)

    Density(g/cm3) 3.03-3.08

    Hardness (HRS) ≥90

    Modulus of Elasticity(Gpa) 367

    Bending Strength(Mpa) ≥350

    Compression Strength(Mpa) ≥2000

    Thermal Coefficient(25°) ≥150

    Thermal Expansion Coefficient 4.3

    2.Content of Silicon Carbide

    Silicon Carbide ≥90%

    Free-Silicon value(%) <10%

    Sintered Silicon Carbide (SSiC)

    Higher Hardness (92.3 Rockwell)

     Higher Strength (401 MPa)

     Anti-Oxidation Performance

     Higher Temperature Resistance

     Higher Corrosion Resistance

     Density 3.12 g/cm³

    Sintered Silicon Carbide with Graphite (SSiC+C)

    fine graphite particles

     enhanced performance from SSiC

     improved self-lubrication

     improved dry friction resistance.

    Typical Application Conditions:

     high corrosion

     high load

     dry friction

    Porous Sintered Silicon Carbide (Porous SSiC)

    Spherical pores formed during sintering process

    Typical Application Conditions:

     hard conditions of limited lubrication

     hard-face to hard-face friction

    Porous Silicon Carbide with Graphite (Porous SSiC+C)

    Contains both fine graphite particles    and spherical pores

     Excellent performance of both SSiC, SSiC+C and Porous SSiC

     Resistance to dry friction and thermal shock

    Typical Application Conditions:

     hard working conditions