Ceramic Plunger Ensuring Long Lasting Pump Performance

Ceramic Plunger Ensuring Long Lasting Pump Performance

Ceramic plunger pistons for HPLC pumps are an integral component that create pressure and push solvent through analytical columns. As an advanced alternative to metal plungers, they offer numerous advantages including chemical stability, longevity and precision.

Xiamen Unipretec Ceramic Technology Co Ltd specializes in producing zirconia ceramic plungers and pistons for use with high-pressure plunger pumps, automatic filling machines, medical controlled volume pumps and syringe pumps. These products feature outstanding resistance against chemicals, heat, abrasion and corrosion.
Wear Resistance

Ceramic plungers offer superior long-term performance and value when applied to applications requiring consistent low flow rates, such as commercial cleaning, misting, chemical injection and pest control. Their hardness, high melting points, wear resistance and corrosion/oxidation protection make them the optimal solution.

Metal materials tend to corrode quickly in water-based media and plungers made of them can produce seal wear particles that lead to inaccurate volume delivery and poor accuracy.

To address this problem, TPCI Fortis employs a virgin polyetheretherketone (PEEK) backup ring with higher tensile strength than seal jacket geometry to push the plunger back into alignment and prevent pools of saline media from collecting behind the seal. A high surface finish ensures that it does not rub against the plunger, creating scratch marks. In addition, its tight tolerances help limit any possible frictional wear-and-tear between ring and plunger further increasing plunger life spans.
Corrosion Resistance

Ceramic plungers can withstand corrosion in harsh environments and the degradation caused by frequent pump use and chemical exposure, helping HPLC systems maintain high performance for an extended number of analytical cycles, thus decreasing maintenance costs and increasing lab productivity.

Ceramic plungers feature hard and smooth surface finishes that extend seal life, as rougher plungers can cause excessive seal wear that shortens analyzer lifetime cycles. Furthermore, their high surface finish helps minimize abrasion while providing self-lubrication to provide maintenance-free operation.

Backup rings are often included to ensure correct alignment and prevent media pooling behind the seal, thus avoiding scratching or damaging of the plunger. Tight tolerances must also be observed between the backup ring and piston to avoid misalignment causing shaft-to-bore misalignment (STBM), leading to premature leakage and inaccurate dispensing.
High Temperature Resistance

Ceramic plungers boast superior thermal stability compared to metal counterparts, providing longer lifespan and superior operation in high temperature environments.

Corrosion resistance is another key feature of ceramic plungers. They can withstand exposure to acids, alkalis and saltwater without becoming compromised or damaging pump components in any way.

An addition of PEEK backup rings can extend seal life. Their high modulus allows for more concentric plunger movement and decreases side-loading on dynamic seal ID lips, further prolonging seal lifespan.

PEEK material is highly durable and resistant to abrasion, making it ideal for high-pressure applications with tight tolerances in hardware tolerances. This helps prevent misalignments that would result in excessive wear on pump components that would shorten its lifetime significantly.
Precision

Ceramic plunger pumps operate smoothly and with little friction and noise, contributing to their stable operation and helping prevent equipment overheating, thus increasing equipment lifespan significantly.

Ceramic plungers also boast another distinct advantage - no lubrication is necessary even under vacuum conditions! This saves both time and effort as well as reduces costs associated with lubrication costs.

Ceramic plungers feature high tolerances that enable accurate and consistent pressure distribution in applications requiring high accuracy, such as medical control-volume or syringe pumps. They're an ideal choice when precision is essential.

Zirconia ceramic is an ideal material for high-performance pump plungers and pistons due to its exceptional properties of refractoriness, hardness, wear resistance, chemical inertness, corrosion resistance, Yttria-stabilized zirconia offers exceptional mechanical properties for high performance pumps used in analytical chemistry applications, such as HPLC pumps.