Recently, Zhejiang Nanchi Pump Co., Ltd. has achieved another fruitful result in localization substitution. Aiming at the pain point of rapid wear of nylon stators and rotors for Hishin progressive cavity pumps, the company completed material upgrading and improvement. The replacement spare parts with PTFE (Polytetrafluoroethylene) wear-resistant stators have been stably applied at Jiangsu Changyang for a long term. The two parties have maintained sound cooperation for five years. This solution effectively solves the production problems of fast wear and frequent maintenance of imported parts and helps enterprises reduce costs and improve efficiency.
Jiangsu Changyang originally adopted Hishin progressive cavity pumps on its production lines, equipped with OEM nylon stators and rotors. In practical working conditions, nylon has limited wear resistance. The components wear out quickly, requiring frequent shutdowns for part replacement. Imported spare parts come with high purchasing costs and long lead times, which disrupt continuous production, increase equipment maintenance workload and become a major operational pain point. To improve equipment performance, Jiangsu Changyang turned to Zhejiang Nanchi Pump, a long-time specialist in R&D and manufacturing of progressive cavity pumps, for a customized domestic replacement solution.
Upon receiving the requirement, the technical team of Zhejiang Nanchi Pump carried out targeted R&D and optimization to address the poor wear resistance of the original nylon stator, upgrading the stator material to PTFE. PTFE features excellent wear resistance and corrosion resistance. Meanwhile, the dimensions and profile accuracy are strictly benchmarked against original Hishin parts, so the replacements can be mounted directly without modifying the existing pump body, achieving non-destructive substitution. After repeated condition tests and on-site verification, Nanchi’s PTFE stator and rotor replacements perform excellently. Compared with the original nylon version, wear resistance is greatly enhanced, equipment operation stability is significantly improved, part replacement frequency and downtime are reduced, cutting the overall cost of spare parts procurement and maintenance for the customer. Since the project launch, Zhejiang Nanchi Pump and Jiangsu Changyang have cooperated for five years. The replacement parts keep running reliably on the production line under long-term working conditions, and the product reliability has been fully recognized by the customer.
Founded in 2003, Zhejiang Nanchi Pump takes technological innovation as its core competitiveness. It has built a complete full-value chain covering R&D, manufacturing, sales and technical service, equipped with modern CNC machining equipment. Seven series of progressive cavity pumps have been developed, widely used in industrial, food, environmental protection and many other sectors. The company keeps providing customers with customized efficient fluid transfer solutions and supporting numerous enterprises to realize localization upgrading of imported pumps and spare parts.
