LKH centrifugal pumps

Designed to meet the hygienic requirements of the dairy, food and beverage and personal care industries, LKH centrifugal pumps increase process productivity while providing high efficiency and gentle product handling.

A premium performer

As Alfa Laval’s premium range of centrifugal pumps, the LKH centrifugal pumps are distinguished by high efficiency, low energy consumption, several options, and a wide range of flow rates and pressures.

High efficiency

A precision-engineered pump and motor provide high efficiency and gentle product treatment. The robust design and tight tolerances together with the advanced impeller design minimize recirculation and ensure the efficient transfer of energy.

Optimal pump design

The impeller design ensures efficient and gentle handling of the product as it moves through the pump. This ensures product integrity and minimizes NPSHr ( Net Positive Suction Head required).

Low energy consumption

Making pump energy use more efficient presents huge potential for energy savings. The optimized pump design and premium motor of Alfa Laval LKH centrifugal pumps often deliver greater energy efficiency than similar premium pumps and 30% or more compared to similar mid-range pumps.

Cleanablity and hygienic design

The key is the attention to detail. Controlled compression gaskets, crevice free internals, an external mechanical seal, and an optimised impeller with balancing holes all ensure that the pump is truly cleaned during a time effective CIP cycle. Perfectly aligned components and joints with O-rings tightened to a predefined compression minimize the elastomer product contact surfaces, which also safeguards hygiene.

External shaft seal – hygienic and serviceable

By positioning the shaft seal outside the pump, difficult-to-clean components do not come into direct contact with the product. In addition, the front-loading design enables quick and easy replacement, providing more uptime with lower maintenance costs. Interchangeable single, flushed and double seals simplify spare parts inventory.

Different models for different duties

Several different LKH pump models are available to meet the requirements of different duties:



LKH UltraPure centrifugal pumps

Designed to meet the specific demands of the biotech and pharmaceutical industries, LKH UltraPure centrifugal pumps deliver maximum uptime and high efficiency plus the benefits of easy cleanability and thorough documentation.

Top of the line

The LKH UltraPure is the premier choice for biopharmaceutical processes that demand high efficiency, exceptional cleanability, contamination safety, robust design and low maintenance. An external shaft seal, advanced impeller design and crevice-free internal surfaces are the special features, which make these pumps ideal for ultra-clean processes where low energy consumption is of concern.

LKH is also available in a wide rang of other configurations for food, beverage, high-pressure applications etc.


The LKH UltraPure has three design finesses that contribute to an ultraclean process environment.

Specially designed semi-open impeller with balance holes that optimize the flow on the back of the impeller and contribute to the high cleanability of the shaft seal as well as of the pump itself. Increased flow around the shaft seal also provides good cooling and circulation, which prolong the service life of the seal.

The number of product wetted parts is limited to a minimum. The few parts are perfectly matched and joints are sealed with o-rings that are tightened with a pre-defined compression, leaving no room for contaminants to hide and minimizing the elastomer surfaces in contact with the product.

External shaft seal provides maximum hygiene by placing difficult-to-clean parts on the outside of the pump. The external shaft seal ensures that the centrifugal forces in the pump contribute to the enhanced lubrication of the shaft seal and that wear particles are forced out of the pump and do not mix with the product.

Unmatched performance

High efficiency, optimized flow, low contamination risk and minimal wear are hallmarks of the LKH UltraPure.

High efficiency

A precision-engineered pump and motor provide optimal efficiency with gentle product treatment. The robust design and tight tolerances together with the advanced impeller design minimize slip and ensure that the energy is used to transport the liquid through the pump without diminishing cleanability.

Optimized flow

The advanced impeller design provides optimal fluid flow throughout the pump. High flow, especially behind the impeller where the shaft seal is located, contributes to easy cleanability and enhanced lubrication and cooling of the shaft seal. The specially designed inlet with the vanes on the impeller blades contributes energy to the flow of fluids prior to entering the pump casing. This minimizes the NPSHr (Net Positive Suction Head required) as well as the forces on the product itself.

Low contamination risk

The external shaft seal ensures that wear particles from the shaft seal are directed by centrifugal force to the outside and thus do not come into contact with the medicinal product. The low NPSHr minimizes the risk of cavitation, which can damage shaft seals and pump components and introduce contaminants into process fluids. Carefully selected materials and easy-to-clean design also reduce the risk of contamination.

Minimal wear

The semi-open impeller design together with the external shaft seal maximizes flow and helps cool and lubricate the shaft seal. This prolongs the service life of the seal.

Supply and delivery

The LKH UltraPure comes in five different standard sizes with capacities of up to 90 m3/hour. A smart alternative for pump duties that require continuous operation, the LKH UltraPure centrifugal pump delivers the highest possible efficiency and minimizes energy consumption. It is also available with a wide range of options for:

  • Shaft seals
  • Flushing arrangements
  • Elastomers
  • Surface finishes
  • Drain options
  • Passivation
  • Hydrostatic testing

To shorten lead times, all standard pumps are in stock to ensure fast and efficient delivery within 10 working days. Delivery of standard pumps with any option is 20 working days from order receipt.

Total peace of mind with complete documentation for validation

All equipment and components in the Alfa Laval BioPharm portfolio are supplied with Alfa Laval Q-doc, a comprehensive documentation package that provides full transparency of the entire supply chain, from raw material to final equipment delivery. This smoothes purchasing and installation procedures as well as facilitates qualification, validation and change control procedures. Based on GDP (Good Documentation Practice), Alfa Laval Q-doc covers every aspect of BioPharm equipment supply and provides customers with transparent and well-documented quality assurance of the sourced equipment.

The Q-doc package for LKH UltraPure comprises equipment manuals, performance tests, quality and manufacturing procedures, material certificates, traceability of product wetted parts and the necessary parts and service information. This attention to detail maximizes uptime and minimizes risk.

For more information about standards and certificates, see Documentation.


Alfa Laval provides a three-year warranty for all non-wearing parts, provided genuine parts are used.


SRU rotary lobe pump

With its smooth, low-shear pumping action, the SRU is Alfa Laval’s core rotary lobe pump for the gentle handling of sensitive process fluids within the dairy, food and beverage, biotechnology and pharmaceutical industries.


Alfa Laval SRU rotary lobe pumps are carefully engineered to provide reliable performance, trouble-free operation and superior energy efficiency for demanding applications. It is an excellent choice for duties that require contamination-proof pumps to meet high standards of hygiene, low-shear and low-pulsation operation. This EHEDG-approved pump handles both Cleaning in Place and Sterilization in place, and can be supplied with thorough documentation to support rigorous validation requirements.

For even more demanding hygienic and ultra-clean duties, Alfa Laval offers the SX rotary lobe pump

Consistent performance, minimal risk of contamination

SRU rotary lobe pumps are designed with features that maximize performance and minimize the risk of contamination. These include a defined compression front cover sealing, rotor nut retention design, drainable pump head and ultra-clean surface finishes.

Safeguarding product quality

Understanding of flow patterns is vital to ensure high efficiency fluid transfer with low pulsation, low shear and low noise characteristics. Alfa Laval employs Computational Fluid Dynamics (CFD) to establish exact geometry for the rotors and rotor case.

Greater flexibility and application fit

The modular design of the SRU provides greater flexibility to configure exactly the right solution for specific process requirements.

To meet different process requirements, the SRU features an R90 external shaft seal, which may be specified in various materials and configurations in order to ensure the correct shaft seal for the application. Alternatively the SRU can be fitted with Hyclean mechanical seals as well as other seal solutions.

In addition to a broad range of models and capacities available in horizontal or vertical porting, the SRU has a wide selection of options, including standard and custom seals, heating/cooling saddles and jackets, an integrated pressure relief valve and a rectangular inlet for pumping high viscosity fluids.

Robust construction – low maintenance

To deliver reliable operation and low maintenance the SRU features a robust gearbox construction with heavy-duty shafts, torque locking assemblies and taper roller bearings throughout.

Supply and delivery

The SRU range is available with twelve different pump head displacements, flow rates up to 106 cubic m/h, differential pressures up to 20 bar, temperatures up to 200 Deg C and port sizes from 25 to 150 mm in diameter.

Certification, specification and standards

SRU rotary lobe pumps comply with EHEDG, 3-A, 3.1 and FDA hygienic standards and have ATEX approval for use in explosive environments. For more information, please consult the documentation provided


SX rotary lobe pump

The SX is Alfa Laval’s premium rotary lobe pump designed for gentle transportation of process fluids in hygienic and ultra-clean applications in the biotechnology and pharmaceutical industries, health and beauty, and demanding food applications.
With the SXs multi-lobe rotor geometry it offers low pulsation and gentle pumping. This makes it the best choice for transporting sensitive products that require gentle handling to minimize shearing. This EHEDG-approved pump is designed for both Cleaning in Place and Sterilization in Place.

Protecting end-product quality

Low pulsation, low shear and low noise characteristics, while ensuring efficient fluid transfer, are trademarks for the SX pump. This high level of performance has been achieved through a detailed understanding of flows and the exact geometry of the rotors and rotor case. For this Alfa Laval employs Computational Fluid Dynamics (CFD).

Enhanced cleanability

SX rotary lobe pumps are designed with features that maximize performance and minimize the risk of contamination. These include a low-profile rotor nut, hygienic front-loading mechanical seals, defined compression front cover sealing, fully drainable pump head with 3 Deg fall angle, and sanitary or ultra-clean surface finishes.

Cleanablity hand-in-hand with low maintenance

Designed for maximum cleanability and ease of access, the SX pump is a low maintenance solution. Alfa Laval manufactures all pump parts, including the rotor case and high-precision rotors. This facilitates maintenance and guarantees full interchangeability of spare rotor parts.

For reliable operation and lower maintenance the robust gearbox construction comes with heavy-duty shafts, torque locking assemblies and taper roller bearings throughout. The gearbox’s universal design provides the flexibility of mounting the pumps with inlet and outlet ports in vertical or horizontal position.

Supply and delivery

Available in 14 different models, SX rotary lobe pumps are capable of handling of a wide variety of viscosity and temperature requirements, flow rates up to 115 m3/h, pressures up to 15 bar and temperatures up to 150 Deg C. A wide range of seals is available to ensure that the right seal is selected for the specific application.

Certification, specification and standards

All SX rotary lobe pumps comply with EHEDG, 3-A, 3.1 and FDA hygienic standards and have ATEX approval for use in explosive environments. For more information, please consult the documentation provided.


Sanitary Diaphragm Pumps

Verderair Pure Pumps

Air actuated diaphragm pumps for beverage and food and pharmaceutical industry. These pumps are 3A and FDA compliant. Flow up to 570 l/min



Unique PMO mixproof valves (US)

Alfa Laval PMO mixproof valve technology allows CIP solution to clean one valve seat while product runs in the opposite housing – virtually eliminating CIP downtime so processors can increase production while maximizing floor space and resources.

PMO-compliant mixproof valves

With the most complete and consistent family of valves available, each PMO variant is based on the same trusted and proven standard PMO mixproof valve – backed by thousands installed globally. Alfa Laval Unique PMO (Pasteurized Milk Ordinance) mixproof valves meet the stringent requirements of the FDA’s Pasteurized Milk Ordinance and are fully 3A compliant. All seat movements are detectable, using Alfa Laval ThinkTop valve sensing and control devices. This makes Unique PMO mixproof valves an extremely secure solution to help manage and optimize the flow of your individual dairy processes.

Unique PMO mixproof valves are primarily installed in the US – globally standard Unique mix-proof valves are the preferred choice.

Modular design – flexible valve installations

The Unique PMO mixproof range is constructed from a series of base components that provide flexible configurations to fit your application requirements. Because the same valve body is utilized in all standard mixproof valve configurations, upgrading is fast with no need to remove the valve body; simply exchange the plugs, actuators and other minor elements. The benefit is an ease of interchangeability exclusive to Alfa Laval where any installed standard PMO valve can be easily upgraded from PMO to PMO – F, to PMO Plus to PMO Plus – CP.

Lower total cost of ownership

Cost-saving features include the top-loaded, easy-to-disassemble design, no adjustable components and fully protected, long-life radial seals.

Unique PMO valve range

Alfa Laval offers the most comprehensive range of PMO-compliant mixproof valves:

Standard Unique PMO mixproof valves:


Unique PMO complies with the FDA`s Pasterized Milk Ordinance (PMO) and covers all mixproof dairy applications.
Unique PMO-F for cleaning or flushing product build-up during continuous operation
Unique PMO Plus allows seat lift cleaning in one chamber while product is the the other.
Unique PMO Plus CP for continuous product processing in any chamber while cleaning product in the other chamber