1. Relationship between Material and Lifespan
High-chromium cast iron
Lifespan: Approximately 2,000 hours. Suitable for high-temperature environments, but with poor wear resistance.
Polyurethane
Excellent wear resistance, up to 4,200 hours, but limited high-temperature resistance (recommended operating temperature ≤ 60°C).
Stainless steel (304/316L)
Meets food-grade hygiene standards. Lifespan is approximately 3,000-5,000 hours in conventional starch processing. Regular inspection of inner wall wear is required.
2. Wear Types and Maintenance Recommendations
Cutting Wear
Large particles (such as sand and gravel) erode the inner wall at high speeds. Regular cleaning of feed impurities is required.
Corrosive Wear
Caused by acidic substances or oxidation reactions in starch emulsions, 316L stainless steel is recommended.
Fatigue Wear
Long-term high-pressure operation (>0.8 MPa) can easily cause cracks in the inner wall. Operating pressure must be controlled. III. Life Extension Measures
Regular Inspection: Measure the diameter of the grit nozzle every 500 hours. Replace if wear exceeds 10%.
Cleaning and Maintenance: Backflush after shutdown to prevent starch residue from solidifying and clogging.
Material Upgrade: For high-wear conditions, ceramic-lined swirl tubes can be used (lifespan increased by 30%-50%).
