NOTOS® Multi Screw Pumps

Multi screw pumps are particularly suitable for the continuous conveyance of low-viscosity to high-viscosity media in applications with high requirements for a uniform, low-pulsation conveyance process. They are used in a wide range of industrial applications, including the oil and gas industry in the mid- / downstream sectors, shipping and shipbuilding, and power generation. In addition, multi screw pumps are used in the chemical and petrochemical industries, in the food, beverage, cosmetics and pharmaceutical industries, and in tank farms and terminal operations. They also make a reliable contribution to safe and efficient plant operation in lubrication and control oil systems, for example, in hydroelectric power stations.

Yes, NOTOS® multi screw pumps can also be designed for hygienic applications. Depending on the medium and process requirements, hygienic designs with suitable materials, surface qualities and sealing concepts are available. These meet the requirements of hygienically sensitive industries, such as food and pharmaceutical, and enable safe, product-friendly pumping and easy cleaning.

NOTOS® multi screw pumps offer numerous advantages for demanding industrial applications. They are characterised by smooth, almost pulsation-free operation and run quietly and with minimal vibration. High efficiency combined with low NPSHr ensures energy-efficient and safe operation, even under difficult suction conditions. In addition, NOTOS® multi screw pumps enable excellent handling of highly viscous media and provide gentle, shear-free pumping. The robust design contributes to a long service life and low maintenance requirements. Depending on the version, the pumps are also suitable for hygienic applications and are available in hygienic designs, for example, as 2NSH, CIP and SIP compatible.

Multi screw pumps are suitable for pumping low to high viscosity media as well as lubricating and non-lubricating liquids. Depending on the design and type, both clean and shear-sensitivemedia, as well as corrosive or abrasive media, can be reliably pumped, as can liquids with low solid content. Even media containing gas can be pumped safely, depending on the application-specific design. Typical examples include crude oil, heavy oil, heating oil, lubricants, fuels, bitumen and other liquid or viscous media.

Depending on the type and application-specific design, multi screw pumps cover a very wide range of performance and applications. The flow ranges from a few m³/h to around 3,000 m³/h, while operating pressures in low-pressure applications can reach around 160 bar. In addition, multi screw pumps are suitable for a very wide viscosity range, extending up to several hundred thousand cSt. They also offer a high degree of flexibility in temperature: Depending on the choice of materials and seals, media temperatures rangingfrom around −20 °C to over 300 °C are possible.

Yes, multi screw pumps are specially designed for continuous operation and continuous pumping processes. They deliver consistent pumping performance under fluctuating operating conditions and are therefore ideal for supply and transfer applications.

Yes, NOTOS® multi screw pumps are used in numerous applications in the oil and gas industry, both in the midstream and downstream sectors. These include transfer processes, injection applications, supply systems, and auxiliary and ancillary units.

Yes, multi screw pumps have good self-priming properties and are suitable for applications with changing fill levels or difficult suction conditions.

Whether multi screw pumps can run dry depends on the type of pump and its design. NOTOS® 2NSH and NOTOS® 4NS pumps can run dry for short periods, depending on their design and if they’re only used for a limited time. On the other hand, NOTOS® 3NS and NOTOS® 2NS pumps are not suitable for dry running and must be lubricated by the pumped medium during operation. An application-specific design is crucial to prevent damage and ensure safe operation.

Various drive options are available for multi screw pumps, enabling flexible adaptation to different operating conditions and system designs. Depending on the application, the pumps can be operated with a directly coupled electric motor with a fixed speed or with an electric motor in combination with a frequency converter control. In addition, versions with a hydraulic motor or air motor are also available. For special requirements, direct drives via gearboxes and diesel motor drives are also available. The selection of the appropriate drive concept is always application-specific, taking into account the process requirements and operational conditions.

Various materials are available for the construction of multi screw pumps, enabling optimal adaptation to the medium, operating conditions and environmental requirements. Standard material options include cast iron and ductile iron, cast steel and all common stainless steel grades. Duplex and super duplex stainless steels are also used for particularly demanding applications, such as corrosive media or increased mechanical loads. The final material selection is always application-specific to ensure high operational reliability and long service life.

Yes, NOTOS® multi screw pumps from NETZSCH Pumps & Systems can be designed to be API-compliant. They are designed and manufactured in accordance with the relevant API standards for applications in the oil and gas industry. These include API 676 for rotary positive displacement pumps, API 682 for mechanical seals and sealing systems, and API 526 for external safety and pressure relief valves. Depending on the application and project-specific requirements, minor deviations are possible and are transparently agreed upon in advance.

Multi screw pumps are robustly constructed and low-maintenance. Regular inspections and the replacement of wear parts as needed contribute to a long service life and high plant availability.

All relevant original spare parts are available for multi screw pumps from NETZSCH Pumps & Systems. These include spindles, bearings, shaft seals, gaskets, housing parts and other wear-related components. The spare parts are precisely matched to the pump design and ensure reliable, safe operation.

The correct spare part can be identified by the machine number, serial number, or item number. Spare parts lists, technical drawings and the operating and maintenance instructions also provide support. Alternatively, the NETZSCH Pumps & Systems service team can provide expert advice on selecting the correct original spare part.

Yes, multi screw pumps can be customised to a high degree for the respective application. NETZSCH Pumps & Systems offers numerous configuration options to optimally match the pump to the medium, process conditions and installation situation. These include selecting suitable materials and coatings, as well as application-specific screw profiles. In addition, various connection types, for example, DIN or ANSI-compliant, as well as hygienic couplings, are available. Different seal configurations, such as single or double mechanical seals and API flat seal systems, can also be implemented. Additional options such as heating jackets, linings, monitoring sensors and pressure relief valves are also available. In terms of installation, multi screw pumps can be designed flexibly, for example, for horizontal installation with a foot, vertical mounting on a socket or as a semi-submersible version. These versatile customisation options ensure each multi screw pump is designed precisely to meet the specific requirements of the application.

The selection of the right multi screw pump is based on an application-specific design. Decisive criteria include the required volume flow and operating pressure, the viscosity and temperature of the pumped medium, and its lubricating properties. The possible solids content, the planned installation situation, for example, horizontal, vertical, or semi-submerged, as well as standards and norms to be complied with, such as API, hygienic designs, or ATEX, also play an essential role. The experts at NETZSCH Pumps & Systems will assist you in selecting, designing and integrating the right multi screw pump. Based on your process data, a technically and economically optimal solution will be developed.

An extensive range of accessories is available for multi screw pumps to ensure safe and reliable operation. These include coupling protection devices and baseplates, as well as couplings with or without distance pieces. Internal or external pressure relief valves are also available. Temperature and vibration sensors for monitoring pump operation, as well as API plan sealing systems for double mechanical seals, are also available. Heating and cooling jackets can also be used as replacement or supplementary components. All spare parts are precisely matched to the respective multi screw pump and contribute to high operational reliability and a long service life.