Twin Screw

Delicately robust – Positive Displacement and Centrifugal in one pump

Designed for process flexibility, the Alfa Laval Twin Screw Pump is built on a robust, reliable platform that meets stringent hygienic standards. It is capable of handling both product transfer and Cleaning-in-Place (CIP). Its low pulsation characteristics and excellent solids handling capability reduce the risk of product damage, thereby improving product quality. Maintenance is simplified and process uptime increased.

High and low viscosity liquids – all perfectly and reliably pumped

  • Greater process flexibility
  • Ease of service, increased process uptime
  • Robust reliable design, reducing cost of ownership and increasing process uptime
  • Improved product quality
  • Exceptional hygiene and cleanability

Designed for handling sensitive, abrasive and high and low viscosity fluids, the Alfa Laval Twin Screw Pump is ideal for use in hygienic applications in the dairy, food, beverage and personal care industries. Its quiet, virtually pulse-free, smooth and gentle operation makes the pump an excellent choice for handling sensitive products.

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Twin Screw Pump technology

The Alfa Laval Twin Screw Pump combines process duties typically handled by positive displacement with CIP duties typically handled by centrifugal pumps. This provides a robust and reliable platform that offers greater process flexibility.

Process flexibility

Two-in-one operation provides easy handling of process media of varying viscosities as well as CIP fluids. This simplifies piping and pump control, cutting costs and minimizing contamination risks.

Superior suction performance with excellent lift capability and low NPSHr provides installation flexibility and increases product recovery.

Service and reliability

Quick, easy seal replacement with the pump in place is made possible, thanks to a cartridge seal with a truly front-loading, self-setting design. This maximizes process uptime and minimizes maintenance costs. An optional seal service kit program adds maintenance flexibility and cuts operating costs.

A robust, all stainless steel gearbox with timing gears located between bearings, provides an optimized bearing span. Balanced loading of the shaft assembly reduces vibration and noise, increasing component life and reliability.

The oil chamber design enhances bearing and gear lubrication, increasing bearing life and minimizing gearbox running temperature.

Easy access to timing gears, whilst the pump is in position, simplifies the process of screw retiming; there is no need to drain gearbox oil or to remove the coupling and motor.

Operational safety

The Alfa Laval Twin Screw Pump features a clean, external stainless steel finish with profiled elastomers and mechanical seals fully surrounded by the product. Designed for maximum cleanability using FDA-conforming materials, the pump is both EHEDG- and 3-A certified.

The combination of optimized gearbox design and excellent hydraulic performance provides for quiet pump operation, minimizing noise emissions. Running temperature is also minimized, thereby increasing workplace safety.

An optional ATEX version enables use in hazardous zones.

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Quick, easy maintenance

Minimize maintenance costs and maximize process uptime. Seal replacement with the pump in place is quick and easy, thanks to a cartridge seal with a truly front-loading, self-setting design. An optional seal service kit provides maintenance flexibility and cuts costs. Easy access to timing gears whilst the pump is in position simplifies the process of screw retiming without requiring drainage of the gearbox oil or removal of the coupling and motor.

Hogyan működik

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Operating principle

The Alfa Laval Twin Screw Pump is a positive displacement pump. As the pump rotates, the intermeshing of the two contra-rotating screws, along with the pump housing, form volumetric chambers. These chambers fill with the pumped fluid and move it axially from the suction side of the pump to the higher pressure discharge side of the pump.

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Product models

Nine pumps sizes – OS22, OS24, OS26, OS32, OS34, OS36, OS42, OS44 and OS46 – handle flow rates ranging from 0.5 to 134.3 m3/h, pressures of up to 16 bar, and solid sizes up to 43 mm.

Options

  • Single mechanical shaft seal
  • Single flushed mechanical shaft seal
  • Double mechanical shaft seal
  • Seal faces in silicon carbide/silicon carbide or silicon carbide/carbon
  • Product wetted elastomers in EPDM, FPM or FFPM
  • Diffusion hardened screws
  • Heating jacket
  • Rectangular inlet
  • Hydrostatic testing with certificate
  • Reversible flow
  • Bottom inlet or outlet
  • Wide range of port specifications
  • Direct or geared motor
  • ATEX version
  • Multiple MEPS

Get greater process flexibility from your pump

Discover how versatile and reliable the easy-to-service Alfa Laval Twin Screw Pump is. Whether your process fluids are sensitive, contain solids, or have a high or low viscosity, our twin screw solution is up to the task. The Alfa Laval Twin Screw Pump. Delicately Robust.

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Product catalogue

Latest 'Close at hand' online version. New features in the English include: Anytime integration, switching between product and spare parts catalogues, copy-pasting item numbers, help and feedback features, and pdf download option for offline use.

Food Logic

Alfa Laval's hygienic equipment combines high performance with gentle handling to preserve sensitive ingredients. Keeping up with the food industry trends and addressing four key challenges; supplying food products to consumers at a competitive price, getting the most from raw materials, reducing waste and emissions, and delivering safe and hygienic food products.

near Newsletter

To keep you updated on important sustainability issues and opportunities in your industry and processes.

Learn more

Szakcikkek (angol nyelven)

CAD portál

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