Works together with the casing to form a semi-closed flow path, allowing the slurry to run stably within this space;
Protects the internal structure of the pump, reducing direct erosion and wear of the pump casing by high-speed slurry;
Supports and positions the impeller, and some liners (such as the rear liner) are also used to install sealing components, ensuring the performance of the shaft seal;
Because it is parallel to the flow direction of the slurry, it generally has a longer service life compared to the front liner and impeller, but it is still one of the wear parts.
Depending on their structure, slurry pump liners can be divided into front liners and rear liners:
Front liner: Directly bears the impact of high-speed slurry from the impeller outlet, especially at the bottom of the discharge port where casting defects easily occur, resulting in more severe wear;
Rear liner: Usually connected to the pump shaft, serving the function of sealing and support; the assembly quality directly affects the pump's sealing performance and operational safety.
In addition, liner materials commonly use high-chrome wear-resistant alloys (such as Cr27, Cr28) or wear-resistant rubber to improve wear resistance and service life.
