Dependable Metered Flow

NEMO® Immersible Pumps – special design for the petroleum industry


NEMO® Immersible Pumps are used for emptying barrels, tanks, and pits. They are also used where space is limited and the danger of cavitation may be present. In addition, these pumps are suitable for emptying barrels containing materials hazardous to water and the environment.

Features of the NEMO® BT Immersible Pump:

  • compact design
  • high pressure stability
  • low-pulsation handling
  • high suction capability

NEMO® BT Immersible Pump offers you:

  • immersion depths of up to 49 ft
  • low life cycle costs
  • high efficiency
  • high variety of shaft sealing systems
  • easy serviceability

Advantages of the NEMO® BT Immersible Pump

  • can be operated under high pumping pressures and at high capacities
  • capable of pumping a wide variety of substances
  • capacities can be adjusted in proportion to pump speed
  • four different geometries 





1 Rotor
In wear- and corrosion-resistant designs.

2 Stator
Vulcanized into the tube with sealing on both sides in a variety of elastomers, plastics and metals. Stator inlet with chamfered opening for improved feed of the product into the pumping element. The stator is oil-, acid- and alkali-resistant.

3 Drive Train
Coupling rod and two universal joints for power transmission from the drive to the rotor.

4 Shaft Seals
Standard with single-acting, bi-directional, wear-resistant mechanical seal. Upon request, with single- or double-acting mechanical seals of varied designs and from various manufacturers, cartridge and special seals as well as packed glands.

5 Suction and Discharge Housing
Flange and threaded connections in accordance with ANSI/NPT and other international standards. Materials in cast iron, steel, chrome-nickel-steel rubberized; also special materials upon request.

6 Block Construction
The drive is flanged directly to the pedestal of the pump, resulting in compact dimensions, low total weight.

The NETZSCH NEMO® BT Immersible Pump is available in …

  • chrome-nickel-steels
  • duplex and super-duplex steels
  • Hastelloy
  • titanium
  • special materials

… handles…

  • capacities from a few ml/h to 530 gpm
  • pressures of up to 350 psi in standard form

…and offers a great variety of shaft seals such as:

  • packed glands
  • lip seals
  • single-acting, bi-directional mechanical seals with and without quench
  • double-acting mechanical seals (tandem and back-to-back)
  • thermosiphon systems

Certification / Credentials 

  • DIN ISO 9001
  • Certification in accordance with § 19 WHG
  • ATEX Directive
  • GOST R and GOST K
  • Material certifications
  • Test reports
  • Welding certificates
  • Non-destructive material testing
  • Sound level measurement
  • Quality plans
  • Progress reports
  • Other certification and credentials upon request


In the oil field, surface water mixed with crude oil accumulates in pits that must be emptied. There can be considerable variation in the viscosity of this oil/water mixture, depending upon its temperature and the ratio of its components. NETZSCH® Immersible Pumps handle this mixture reliably and securely to processing plants from depths of up to 49 ft.

Wide Spectrum of Applications
The NEMO® Immersible Pump is used primarily for substances with the following properties…

  • low to high viscosity (1 cPs to 100,000 cPs)
  • thixotropic and dilatant
  • shear-sensitive
  • abrasive
  • sticky to dry
  • aggressive (pH 0 to 14)
  • adhesive
  • toxic

… such as

  • crude oil
  • crude oil polluted with water and sand
  • oil/water emulsions
  • water in oil deposits
  • oil sludge

Additional Features of the NEMO® BT Immersible Pump:

  • suction pipe extension can be mounted to lengthen immersed tube
  • lowest possible NPSH required
  • bi-directional
  • low noise, low vibration
  • temperatures from 0°F to 320°F


Accessories to supplement your system offer optimal security

The following accessories are available for NETZSCH NEMO® Immersible Pumps:

  • A great assortment of shaft sealing systems planned in accordance with API 682 and seal sizes in accordance with API 610
  • Systems for monitoring the conveying pressure
  • Dry running protection units
  • Safety valves
  • Electrical control systems
  • A great variety of drive systems
  • Tank lid and support guides