KREBS® - Model UMD -Ultimate Mill Discharge Pump
A heavy-duty slurry pump for tough, abrasive applications; Our KREBS UMD™ centrifugal slurry pump is the most advanced heavy-duty slurry pump available for mill discharge applications. Optimized hydraulic design delivers the highest efficiency and even wear in the most abrasive mining applications.
The millMAX UMD has all of the benefits of the millMAX suction side sealing system in addition to a hydraulically improved design that:
- Minimizes turbulence inside the volute
- Increases the wear life of the wet end components
- Reduces Downtime
- Increases Slurry Efficiency
- Maintains consistent pressure to Hydrocyclones
The bottom line is the UMD pumps more tons per kilowatt while lasting longer than the competition.
millMAX UMD is the product of FLSmidth Krebs continual effort to partner with our customers by listening to their feedback and improving our designs to best meet their needs.
The Ultimate Mill Discharge Pump is designed for the harshest abrasive environment.
Applications include:
- Mill discharge
- Oil sands hydrotransport and PSV/PSC feed and underflow
- Tailings
- Froth
- Cyclone feedThickener underflow
- High-flow applications
- Other highly abrasive applications
Ultimate Slurry Pumping Performance
Pumping the discharge from hard rock grinding mills is one of the most high-wear applications due to high concentrations of abrasive solids. Conversely, the hydrotransport process in oil sands deals with a range of particle sizes from very coarse sand and heavy lumps to fine clay and coarse silica sand. Our UMD pump was designed specifically for these highly abrasive and diverse particle size applications. By integrating a superior hydraulic design and the patented millMAX suction-side sealing system, the UMD maximizes wear life and increases efficiency.
Applications include:
- Mill discharge
- Oil sands hydrotransport and PSV/PSC feed and underflow
- Tailings
- Froth
- Cyclone feed
- Thickener underflow
- High-flow applications
- Other highly abrasive applications
Casing symmetry
Many customer sites have pumps rotating in both left- and right-hand orientations. This requires keeping different casings, liners and impellers in stock. Our UMD has a symmetric casing, which means for either orientation, it uses the same casing, suction liner, wear ring and back liner, reducing customer inventory requirements.
Unique design
The UMD’s large clearance between the casing and impeller creates a deep bed of slurry that acts as a buffer zone, shielding the casing from the direct impact of coarse solids. An enlarged cutwater clearance reduces turbulence to extend pump life. Side liners with oversized outer diameters protect the casing from high velocity and turbulence at the periphery of the impeller.
The impeller features optimized pumping vane shape, increased shroud diameter, and improved expelling vane shape to bring you the most hydraulically advanced impeller of its kind.
The design also accommodates fine solids with durable, replaceable and less expensive liners. We extended the back liner and suction liner diameters to reduce wear and improve performance.
Range of options
The UMD includes a wide range of pump sizes that can handle flows from 50 to 20,000 cubic meters per hour (200 to 90,000 gallons per minute). The UMD high-pressure models are also available for multistage high-pressure applications.
UMD-R elastomer lined pump
The UMD-R is a fully rubber lined, split case version of the UMD, designed for heavy-duty mill discharge applications. With heavy-duty rubber liners the UMD-R is particularly suited for wide flow ranges and corrosive duties.
Less downtime and more volume with our UMD pump
Increased Wear Life
To stop recirculation, pumps without a wear ring must adjust their impeller and suction liner close together. This can be effective when pumping fluids with no solids; with slurries, however, the solids become caught between the rotating impeller and static suction liner, and are crushed. Grinding these solids consumes power and wears out the impeller and liner. The wear ring technology stops stop recirculation, and allows for a large gap between the impeller and suction liner – eliminating solids grinding.
Lower Power Consumption
Because the UMD maintains a constant operating speed and does not grind particles, the pump naturally lasts longer and consumes less power (up to 30% less).
Increased Mill Throughput
Grind in your mill – not in your pump. The UMD protects against particle degradation, lost production and allows greater throughput.
Reduced Cost-per-ton Pumped
The UMD has been proven worldwide to reduce power costs, reduce maintenance costs, reduce downtime, and eliminate particle degradation when compared to conventional pumps – in all, reducing your cost-per-ton pumped.
Lower Inventory Requirements
Our UMD features a symmetric casing that uses the same suction liner, wear ring and back liner for both left- and right-hand orientations reducing customer inventory requirements.
The UMD pump is the longest-lasting and most efficient slurry pump in its class. This pump is ideal for highly abrasive applications, such as hard rock mining and oil sands, with efficiency, long wear life and reliability.
The UMD’s large clearance between the casing and impeller creates a deep bed of slurry that acts as a buffer zone, shielding the casing from the direct impact of coarse solids. An enlarged cutwater clearance reduces turbulence to extend pump life. Back and suction liners with oversized outer diameters protect the casing from high velocity and turbulence at the periphery of the impeller.
Patented suction-side sealing
An adjustable wear ring takes up clearance at the impeller, reducing suction-side recirculation, maintaining hydraulic performance. The extended wear ring diameter is designed to increase the life of the millMAX suction-side sealing system. Four external screws provide online wear clearance adjustment. The suction side clearance is fully adjustable while in operation.
Replaceable suction and back liners
Replaceable suction and back liners, with patented extended diameters, protect the casing from turbulent wear. High chrome and elastomer liner material options are available, providing the ideal solutions for a wide range of applications and flow.
Optimized impeller design
We have optimized the shape of the pumping vanes, increased the shroud diameter, and improved the shape of expelling vanes to bring you the most hydraulically advanced impeller of its kind.