
NEMO® BO/BS Pump With Hopper in Block Construction
Ideal pump for crumbly media in compact design for nearly all branches of industry
The NEMO® BO/BS progressing cavity pump with hopper and coupling rod with feeding screw as well as force-feed chamber for improved product feed into the conveying elements is used for applications in the environmental technology, food and chemical industries.
The NEMO® BO/BS is particularly suitable for shear-sensitive, lubricating and non-lubricating, thixotropic, dilatant, highly viscous and crumbly media that do not tend to bridge, as well as for slowly flowing to non-free-flowing media with and without solid content. The difference between the BO/BS types lies in the inlet hopper. The BO series has a rectangular inlet hopper and the BS series has a square inlet hopper. Both pump types are used in almost all branches of industry for continuous, pressure-stable, gentle and low-pulsation conveying. This special design ensures a better product feed into the conveying elements. In addition, the progressing cavity pump ensures speed-proportional dosing of almost all media. In block construction with a flanged drive, this pump is particularly compact and economical.
Technique

- Variable modular system
- Robust and compact block construction
- The right joint for any application
- Standard mechanical seal, other seals optional
- Gentle product conveyance
- Pump connections in accordance with national and international standards, as well as in specially designed models
| Name | Pressure max. (bar) | Capacity min. (m³/h) | Capacity max. (m³/h) | Speed (rpm) |
|---|---|---|---|---|
| NM015 BO/BS | 12 | 0,01 | 0,7 | up to 800 |
| NM021 BO/BS | 12 | 0,04 | 2 | up to 800 |
| NM031 BO/BS | 12 | 0,1 | 5 | up to 600 |
| NM038 BO/BS | 18 | 0,25 | 12 | up to 600 |
| NM045 BO/BS | 18 | 0,5 | 20 | up to 550 |
| NM053 BO/BS | 18 | 0,8 | 30 | up to 550 |
| NM063 BO/BS | 18 | 1,4 | 40 | up to 500 |
| NM076 BO/BS | 18 | 2,5 | 55 | up to 350 |
| NM090 BO/BS | 18 | 3,5 | 80 | up to 300 |
| NM105 BO/BS | 12 | 7,5 | 120 | up to 250 |
Further sizes and technical data on request.

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Applications NEMO® BO/BS pump with hopper
FAQ progressing cavity pumps
Progressing cavity pumps are particularly suitable for pumping highly viscous, abrasive, solid-laden or shear-sensitive media. Typical applications include the chemical, food, environmental, paper and building materials industries, as well as the oil and gas sector.
NEMO® progressing cavity pumps from NETZSCH Pumps & Systems are characterised by gentle, low-pulsation pumping, high dosing accuracy and a wide range of applications. They enable a constant delivery rate even with changing pressures and media compositions.
Progressing cavity pumps can be used to convey low-viscosity to highly viscous media, including slurries, suspensions, pastes, media with a high solids content, and sensitive or gas-laden liquids.
Yes, progressing-cavity pumps are self-priming and exhibit excellent suction performance. This makes them ideal for applications with changing fill levels or difficult suction conditions.
Maintenance requirements are low and predictable. Wear parts such as the rotor and stator can be easily replaced. Maintenance-friendly designs enable short downtimes and high plant availability.
The service life depends on factors such as the medium, speed, pressure and choice of materials. Professional design and the use of original spare parts ensure a long service life and economical operation.
All relevant original spare parts are available for progressing cavity pumps from NETZSCH Pumps & Systems, including rotors, stators, seals, joint parts and other wear-related components. The spare parts are precisely matched to the pump design and ensure high operational reliability.
The correct spare part can be identified by the machine number, serial number, or item number. Spare parts lists, sectional drawings and the operating and maintenance instructions also provide support. Alternatively, the NETZSCH Pumps & Systems service team can provide expert advice on selecting the right original spare part.
The experts at NETZSCH Pumps & Systems will assist you in the design, selection and integration of the right progressing cavity pump – tailored to your specific pumping tasks and process requirements.













