The pump cylinder piston is a critical replacement part for SU-999 DN-999 1:1 DN-999 2:1 injection pumps, designed to maintain reliable performance and stable pressure. After 5,000–10,000 injection packer operations, the piston may experience wear that can lead to insufficient pressure. To ensure consistent injection efficiency and extend the service life of your pump, it is recommended to replace the cylinder piston promptly. Built with durable materials and precise engineering, this piston guarantees smooth operation and dependable results for both professional and industrial applications.