For pump and valve equipment enterprises, when conveying corrosive media, metal plungers are subject to long-term scouring by the media, their surfaces wear rapidly, corrosion pits appear, sealing fails, and media leakage occurs. Equipment shutdowns for maintenance are frequent, and spare parts replacement costs are high, seriously affecting the continuous operation of production lines.

The customer originally used stainless steel plungers. Under acid-base mixed media working conditions, the continuous operation life was only 820 hours. After wear, the sealing leakage failure rate was relatively high, and the equipment needed to be shut down for inspection and spare parts replacement every month.

Based on the pump body installation dimensions, medium composition, and working pressure, the technical team of Dongguan Zhongli Nano Ceramics Technology customized nano ceramic plungers. High-purity nano ceramic raw materials were selected, and through high-temperature sintering and precision grinding processing, the surface roughness was controlled within Ra0.02μm. The plungers have high hardness, acid-base resistance, and scouring resistance, and match the customer's original pump body structure, requiring no major equipment modifications.

After the ceramic plungers were processed, wear resistance and acid-base corrosion resistance tests were carried out. Under the same corrosive medium working conditions, the continuous operation life was increased to 4800 hours, and the scouring resistance was greatly enhanced. After being put into batch use, the plunger wear and leakage problems were significantly improved, the frequency of equipment shutdowns for inspection and maintenance dropped by 75%, and spare parts procurement and equipment maintenance costs were reduced.

Zhongli Nano Ceramics is located in Dongguan and mainly produces nano ceramic structural parts, ceramic plungers, ceramic shafts, ceramic wear-resistant bushings, and ceramic valve plates. It supports customization from drawings, precision grinding, and dimensional tolerance control, and can provide ceramic wear-resistant parts solutions for the pump and valve, medical device, and automation equipment industries. It supports small-batch sample proofing and customized non-standard ceramic precision parts on demand.