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Orion Series horizontal slurry pumps are robust pumping equipment designed for abrasive slurries. The series consists of two ranges, heavy duty H-range and mining duty M-range. In both ranges the pumps are available as rubber lined or hard metal lined versions.
Low total cost
The result of over 60 years of experience from thousands of pumping applications.
Low power consumption
Optimal power utilization. Operate close to the best efficiency point. Improved hydraulic efficiency.
Long wear life
Wear parts of highest quality hard metal, rubber and corrosion-resistant materials. Extra thick sections at known points of wear.
Reliability in operation
Pumps and parts are manufactured under total quality management in ISO certified production units.

Orion Series H-range and M-range
H-range
Made for the most arduous industrial slurry pumping applications. Consists of hard metal lined (HM) and rubber lined (HR) pumps.
- Flow rates to 2 800 m³/h – 10 000 USGPM
- Heads up to 100 m – 330 ft
M-range
Designed for abrasive duties and medium heads in general plant transfer applications. Covers hard metal lined (MM) and rubber lined (MR) pumps.
- Flow rates to 5 000 m³/h – 20 000 USGPM
- Heads up to 60 m – 200 ft
Typical applications
- Mining and mineral processing
- Hydrocyclone feed
- Mine refuse and tailings
- In plant slurry transfer pumps
- Industrial processing
- Coal and power plant ash
- Sand and gravel
Low total cost
The focused product development combined with over 60 years of experience from thousands of pumping applications has led to continuous improvements in Orion Series slurry pumps.
These slurry pumps offer numerous benefits to customers but the most significant are the lifetime cost savings that can be achieved.
To make Orion Series slurry pumps easily fit to your application in any processing plant, the pumps are available with various motor arrangements such as:
- Direct coupled
- Overhead mounted
- Side mounted
- Reverse overhead mounted


Low power consumption
- High efficiency hydraulic design ensures optimal power utilization
- Range optimization ensures operation close to the best efficiency point
- Use of fluid dynamic software to improve pump hydraulic efficiency
- 3-D computer design technology for development of hydraulic and mechanical components
Long wear life
- Wear parts of highest quality hard metal, rubber and corrosion-resistant materials
- Robust design with extra thick sections at known points of wear
- Highest quality of wear resistant elastomers developed by Metso
- Interchangeability of hard metal and elastomer parts to provide the best solution for each individual application
- Optional special materials available on request
- Careful application at best efficiency point and selection of wear-resistant material give even wear and long life
- Optional wear clearance double adjustment feature increases wear life


Reliability in operation
Specially developed features provide trouble-free operation and a minimum downtime improving the cost effectiveness.
- Oversized high strength alloy steel shaft is carried in heavy duty grease lubricated bearings in a self-contained cartridge assembly
- Double seal arrangement provides positive seal of bearings against contamination
- Reliable gland seal options to meet individual requirements, using expellers, flushed glands or mechanical seals
- Modular design and full interchangeability of parts minimizes stock levels
- Back pull out feature allows ease of inspection and maintenance
- Pumps and parts are manufactured under total quality management in ISO certified production units
Options
IMPELLER OPTIONS
- Standard closed impeller
- Induced flow (Vortex) impeller
- Fully recessed induced flow (Vortex) impeller
SHAFT SEALING OPTIONS
Full flow
Use for suction conditions not suitable for centrifugal sealing when product dilution is not important. Full flow provides the longest packing wearing life.
Low flow
Use for suction conditions not suitable for centrifugal sealing when product dilution needs to be minimized.
Standard expeller shaft seal
Used for no product dilution against positive suction head without leakage.
Metso slurry mechanical seal
Used for zero stuffing box leakage or product dilution. Available as single slurry type mechanical seal or double mechanical seal with external barrier fluid required.


Special configurations
Orion Series slurry pumps can also be supplied in a variety of special configurations:
- HP – High Pressure: Same as HM with heavier duty case for higher pressure.
- HG – Heavy-duty Gravel: Suction and discharge flanges are the same size and impeller has less vanes to pass larger material size.
- HT – Heavy-duty Tunneling: Same as HM with special 90° elbow cast into the casing.
- HH – High Head: Larger diameter impeller for a given flange sizes.
Contact your local Metso slurry pumping experts for additional information.
3D models for Metso slurry pumps
The most common Metso pumps and pump configurations have been made available in 3D for easy integration into your plant layout drawings.
Bareshaft pump models as well as pump assemblies with motor and drive are available to be downloaded in .stp file format.
See 3D materials below:

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Selection of Orion Series H-range slurry pump size and dimensions.
Orion Series H-range technical specifications
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Selection of Orion Series M-range slurry pump size and dimensions.
Orion Series M-range technical specifications
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Parts and services for slurry pumps
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