MD Series Horizontal Multistage Centrifugal Pump
A horizontal, single-suction multistage pump for mine drainage, steel mill and sewage duty, with flow from 3.7 to 1350 m³/h, heads of 49-1800 m and solids up to 1.5%.
The MD series is a horizontal, single-suction, multistage sectional centrifugal pump built for mine drainage, steel mills and sewage conveyance. Published coverage is 3.7-1350 m³/h at heads of 49-1800 m, handling neutral mineral water and similar sewage as well as clean water. The published medium limits are a solid particle content of not more than 1.5%, a particle size below 0.5 mm and a conveying temperature of not more than 80°C. The horizontal, segmented, single-suction arrangement keeps installation and repair straightforward and holds maintenance cost down. Sealing performance and wear-resistant materials are emphasised in the design, so the pump keeps its efficiency over long periods of solids-bearing duty.
| Parameter | Specification |
| Flow rate | 3.7-1350 m³/h |
| Head | 49-1800 m |
| Pump type | Horizontal, single-suction, multistage sectional |
| Solids content | Not more than 1.5% |
| Particle size | Less than 0.5 mm |
| Medium temperature | Not more than 80°C |
| Media | Neutral mineral water, clean water and similar sewage |
| Maintenance | Horizontal segmented design for convenient installation and repair |
| Materials | Wear-resistant materials for solids-bearing service |
The supplier publishes one staged multistage table for the D, MD, DG and DF families. The rows below are the MD-prefixed models from that table, showing how head rises with each added stage.
| Model | Flow (m³/h) | Head (m) | Power (kW) | Speed (r/min) |
| MD6-25x3 | 6.3 | 75 | 5.5 | 2950 |
| MD6-25x4 | 6.3 | 100 | 7.5 | 2950 |
| MD6-25x5 | 6.3 | 125 | 7.5 | 2950 |
| MD6-25x6 | 6.3 | 150 | 11 | 2950 |
| MD6-25x7 | 6.3 | 175 | 11 | 2950 |
| MD6-25x8 | 6.3 | 200 | 15 | 2950 |
| MD6-25x9 | 6.3 | 225 | 15 | 2950 |
| MD6-25x10 | 6.3 | 250 | 18.5 | 2950 |
| MD6-25x11 | 6.3 | 270 | 18.5 | 2950 |
| MD6-25x12 | 6.3 | 300 | 18.5 | 2950 |
| MD12-25x3 | 12.5 | 75 | 7.5 | 2950 |
| MD12-25x4 | 12.5 | 100 | 11 | 2950 |
| MD12-25x5 | 12.5 | 125 | 11 | 2950 |
| MD12-25x6 | 12.5 | 150 | 15 | 2950 |
| MD12-25x7 | 12.5 | 175 | 15 | 2950 |
| MD12-25x8 | 12.5 | 200 | 18.5 | 2950 |
| MD25-30x3 | 25 | 90 | 15 | 2950 |
| MD25-30x4 | 25 | 120 | 18.5 | 2950 |
| MD25-30x5 | 25 | 150 | 22 | 2950 |
| MD25-30x6 | 25 | 180 | 30 | 2950 |
| Item | Detail |
| Casing | Horizontal segmented multistage body with a single suction port |
| Wear parts | Wear-resistant materials selected for solids-bearing and sewage duty |
| Shaft seal | Sealing arrangement matched to mineral water and sewage service |
| Rotor | Multistage rotor in a segmented stator for straightforward repair |
| Solids tolerance | Solid particles below 0.5 mm and up to 1.5% by content |
| Installation | Horizontal set with low maintenance cost and easy manufacture of spares |
- Mine drainage: Lifts neutral mineral water and mine water with fine solids.
- Steel mills: Moves process water and scale-bearing drainage around the plant.
- Sewage conveyance: Transfers sewage containing fine solid particles.
- Power plants: Handles water and drainage duties inside generating stations.
- Chemical plants: Moves neutral mineral water and similar liquids in process areas.
- City drainage and farmland irrigation: Serves municipal drainage systems and irrigation supply.
- Check the solid particle size stays below 0.5 mm and the solids content below 1.5%; beyond that the impeller and casing wear rate rises sharply.
- Keep the conveying temperature within the published 80°C limit.
- Fix the duty point from flow and head, then read the stage count that provides the required head in your chosen casing size.
- Compare the published power with the duty shaft power for solids-bearing service, where the absorbed power can drift above the clean-water figure.
- Allow for wear on impeller and casing in the maintenance plan, since the pump is designed for abrasive service.
What solids can an MD multistage pump handle?
The published limits are solid particles of less than 0.5 mm at a content of not more than 1.5%, with the medium not exceeding 80°C. It is intended for neutral mineral water and similar sewage rather than coarse slurry.
How is an MD pump selected for mine drainage?
Work out the drainage rate and the total head from the sump to the discharge point, then choose the casing size and stage count that covers that duty. For example MD25-30x3 delivers 25 m³/h at 90 m.
Why is a horizontal multistage pump used for mine water?
The horizontal, segmented, single-suction arrangement makes the pump easy to install and repair, and the wear-resistant materials keep efficiency despite the fine solids present in mine water.
What is the MD series pump used for?
Mine drainage, steel mills, sewage conveyance, power plants, chemical plants, city drainage and farmland irrigation, wherever fine solids are present.
What flow and head does the MD series cover?
Flow from 3.7 to 1350 m³/h with heads of 49-1800 m, through staged models built from the same sectional casings.
What are the limits on solids and temperature?
Solid particle content not more than 1.5%, particle size less than 0.5 mm and a conveying temperature not more than 80°C.
How does the MD series handle wear?
The supplier specifies wear-resistant material and good sealing performance, with a horizontal segmented design that keeps maintenance cost and repair time low.
What data is needed for an MD pump quote?
Flow rate, total head, liquid type, solids content and particle size, temperature, available NPSH, voltage and frequency.
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How to Choose the Right MD Series Horizontal Multistage Centrifugal Pump
Quick answer: The MD Series Horizontal Multistage Centrifugal Pump covers flow 3.7-1350 m³/h, heads of 49-1800 m, medium temperatures Up to 80°C. Selection starts from the duty point - flow, head, liquid properties and available NPSH - rather than from the catalogue maxima.
Industry Applications
Explore how this equipment can be applied in related industrial sectors and review application-specific selection guidance.