Centrifugal pump KREBS®

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Overview
Featuring KREBS® proprietary adjustable wear ring technology, these heavy-duty slurry pumps reduce power consumption and extend wet-end wear life when handling abrasive slurries. Designed for mineral processing, mill discharge and other demanding slurry applications, the range provides predictable wear patterns and simplified maintenance strategies.

Key benefits

• Maximise pump efficiency: adjustable wear ring allows in‑service control of suction‑side clearance, preventing internal grinding and improving hydraulic efficiency by approximately 5–10% in slurry duties.
• Extend wet‑end life: maintaining optimal gap reduces internal abrasion and can extend wear life by 50–100% versus conventional designs.
• Flexible liner materials: elastomer, high‑chrome alloy and polyurethane options provide application‑matched wear performance and reduced spare inventory.
• Energy, safety and sustainability: hydraulic and component designs reduce power use, lower maintenance risk and support longer service intervals.

Models (heavy‑duty pumps covered on this page)

• gravelMAX slurry pumps — for large solids handling: large impeller suction‑side clearance prevents in‑pump grinding; wide‑diameter impeller and increased cutwater clearance enable passage of coarse material.
• millMAX slurry pumps — original heavy‑duty mill discharge pump with suction‑side sealing system; standard for cost‑effective mill duty.
• slurryMAX‑XD slurry pumps — horizontal heavy‑duty design with robust impeller and steel‑reinforced elastomer linings for highly abrasive applications such as primary cyclone feed and tailings.
• UMD (Ultimate Mill Discharge) pumps — optimized hydraulics for highest efficiency and uniform wear; can achieve up to ~10% lower power consumption for mill discharge duties.
• UMD‑R mill discharge pumps — fully rubber‑lined, split‑case design for wide flow ranges and corrosive slurries; engineered for predictable wear and low cost‑per‑tonne pumped.

Technology & features

• Adjustable KREBS® wear ring: rapid, safe adjustment of suction‑side clearance while operating to avoid recirculation and internal grinding.
• Suction‑side sealing system (millMAX): enhanced sealing for mill discharge conditions.
• KREBS Quick Release™ system: faster wear‑part changeouts to reduce downtime and improve safety during maintenance.
• Belt tensioning and quick‑change components: simplify routine maintenance and decrease service time.
• FLS SiteConnect mobile capabilities: real‑time monitoring and alerts to support operational optimization and preventive maintenance.

Sealing and lining options

• Sealing options: water flush, centrifugal and mechanical seal arrangements with multiple drive‑side configurations.
• Lining/material options: rubber liners for fine‑particle slurries, high‑chrome metal liners for coarse/abrasive slurries, and polyurethane options combining elastomer flexibility with improved tip‑speed resistance.

Maintenance & service

• Global network of service and spare‑parts centres for prompt access to wear parts and offsite rebuilds.
• Field service engineers provide performance monitoring and recommendations to maintain best efficiency point over time.
• Operation and maintenance training available, including guidance on safe wear‑ring adjustment and quick‑release procedures.

Specifications / technical data

• Adjustable wear ring: increases pump efficiency by ~5–10% in slurry applications when correctly applied.
• Wear life improvement: expected extension of wet‑end life by ~50–100% versus conventional pumps when optimised.
• Power savings: UMD hydraulics can deliver up to ~10% lower power consumption for mill discharge duties.
• Materials: elastomers, high‑chrome alloys, polyurethane (selection dependent on application).
• Sealing options: water flush, centrifugal, mechanical seals (multiple sub‑options).
• Typical applications: mineral processing, abrasive slurry handling, mill discharge, primary cyclone feed, tailings, large solids pumping.
• Available model family: KREBS® gravelMAX, millMAX, slurryMAX‑XD, UMD, UMD‑R.