Industry FAQ

Q: What is the impact of slurry viscosity on pump performance?

A: Increased slurry viscosity reduces pump flow rate and efficiency. Higher viscosity leads to greater frictional losses within the pump and increased power consumption. Pump selection must account for the slurry's viscosity, and potentially require a larger motor or a different impeller design.

Q: How does particle shape affect abrasion rates?

A: Angular particles cause significantly higher abrasion rates than rounded particles. Sharp edges and corners concentrate stress, leading to accelerated wear on pump components, especially the impeller.

Q: What are the benefits of using a recessed impeller design?

A: Recessed impellers provide wider flow passages, reducing the impact velocity of slurry particles and minimizing impeller erosion. They are particularly well-suited for handling slurries with high solids concentrations and large particle sizes.

Q: What type of mechanical seal is most suitable for abrasive slurries?

A: Mechanical seals with tungsten carbide or silicon carbide faces are commonly used for abrasive slurries. These materials offer excellent wear resistance and can withstand the harsh conditions. Double mechanical seals with a barrier fluid are often employed for critical applications to provide an extra layer of protection.

Q: How can I minimize cavitation damage in a high head slurry pump?

A: Ensure sufficient NPSHa (Net Positive Suction Head Available) is maintained, avoid operating the pump at excessive speeds, and ensure that the impeller is properly balanced. Regularly inspect the impeller for signs of cavitation damage (pitting and erosion).