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Technical Ceramics

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Ceramic Plungers for Pump

Due to the ceramic's resistance to chemicals, heat, abrasion, and its low thermal expansion, etc., UNIPRETEC uses ceramics instead of SUS to make plungers (pistons) for high pressure plunger pumps, automatic filling machines, medical controlled volume pumps, syringe pumps, etc. We are specialized in making ceramic plungers that meet customers' needs in terms of roundness, straightness, surface roughness, etc., and improving work efficiency, product lifetime, and precision.

  • Material

    : Al2O3 / Si3N4 / ZrO2
  • Color

    : Ivory / Black / White
  • Density

    : 3.90 / 3.20 / 6.00 g/cm3
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Product Detail

▼ Introduction of Ceramic Plungers


Ceramic plungers perform very well in wear-resistance, high temperature, saltwater, chemical, and metering applications. At UNIPRETEC, we provides ceramic materials including such Alumina (Al2O3), Zirconia (ZrO2), and Silicon Nitride(Si3N4), which enable for a minimum Ra 0.05um surface polish, thereby improving packing life. Following are the typical features of technical ceramics as plungers:


 √ Never Rust
 √ Long Service Life
 √ Chemical Inertness
 √ Low Thermal Expansion         
 √ High Working Temperature   
 √ High Hardness (Mohs 8.0-9.0)


UNIPRETEC can provide ceramic plungers made from high purity alumina and zirconia in solid ceramic or in combination of metal, such as stainless steel 316L or 304L, depending on the customer's specifications. We can bond the advanced ceramic body to the stainless steel adapter for very dependable performance and extended field life. Ceramic plungers developed by UNIPRETEC are available in both solid and hollow ceramic shapes. Ceramic plungers are unique in their performance when corrosion and abrasion resistance as well as longer packing life are required.


▼ Material Properties of Ceramic Plungers


Material Properties of Ceramic Plungers


▼ Applications of Ceramic Plungers


Plungers made of advanced ceramic with high precision are used in a wide range of industries, such as automobiles, chemical and petrochemicals, foundries, oil refineries, paper and pulp manufacturing, cement manufacturing, food processing, thermal power plants, steel plants, etc.


UNIPRETEC manufactures plunger for such applications as:
pressure washer pump for cleaning equipment
oil pump in mining industry
dosing pumps (distribution pumps)
high pressure water jet pump for water jet cutters


Applications of Ceramic Plungers for Pumps

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