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.
Discover Alfa Laval LKH UltraPure
Alfa Laval LKH UltraPure delivers maximum uptime and high efficiency for pharmaceutical applications.
Performance & Reliability
Our wide range of Alfa Laval UltraPure centrifugal pumps with time tested proven modular design maximizes performance with high reliability and simplified maintenance. Designed with the lowest NPSH requirement and low noise levels, reduces the risk of cavitation and provides a safe, reliable working environment keeping processes running.
Efficiency & Sustainability
Advanced, high precision, hydraulic design delivers precise fluid flow through the pumps to provide optimal energy and cleaning efficiency, reducing energy costs, CO2 and waste chemical emissions increasing batch yields and process sustainability.
Enhanced hygienic design
With emphasis on features such as optimized internal geometry, profiled USP Class VI ‘O’-rings, minimized dead legs & improved surface finishes our centrifugal pumps are suitable for CIP (cleaning-in-place) and SIP (sterilization-in place) and offer exceptional levels of hygiene and repeatability of process. All have been designed in accordance with EHEDG requirements.
Advanced Seal design
Many of our pumps share the same fully traceable mechanical shaft seal using high grade materials without extractables. This reduces the risk of process contamination, simplifies maintenance, spare parts inventory and ensures validation. Combined with the quick and easy front loading design, this reduces maintenance costs, increases uptime and reduces the cost of ownership.
Meets global standards
Alfa Laval LKH UltraPure is engineered to meet the most stringent standards and requirements in the pharmaceutical industry.
3 Unique design features
The LKH UltraPure has three design finesses that contribute to high-purity 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 USP Class VI ‘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.
Low cost of ownership
The LKH UltraPure pump is easy and cost effective to service and maintain and offers low cost of ownership and increased uptime, backed up by the security that comes from Alfa Laval’s global service network.
Global coverage with local presence
No matter where you are, we have support and service experts close by. Also, all UltraPure pumps use standardized parts for easy specification and delivery, and fast service turnaround.
A trusted supplier
Alfa Laval is a leading global provider of fluid handling equipment with a history of excellence dating back to 1883, and one of the world's largest hygienic pump suppliers. The Alfa Laval LKH UltraPure, part of the UltraPure portfolio for the most demanding of Pharmaceutical applications delivering equipment of high performance, reliability, security and process sustainability.
The LKH UltraPure comes in eight different standard sizes with capacities of up to 275m3/hour. A smart choice 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
- Surface finishes
- Drain options
- Hydrostatic testing
Experts are close at hand, no matter where you are, we have support and service experts close by. At the same time, all UltraPure pumps use standardized parts for easy specification and delivery, and fast service turnaround.
Alfa Laval provides a three-year warranty for all non-wearing parts, provided genuine parts are used.
- Optimized flow
Need to find documentation for your Alfa Laval UltraPure pump?
All Alfa Laval UltraPure pumps are supplied with Alfa Laval Q-doc, our documentation package providing full traceability of all product contact parts such as steel, gaskets, etc. Alfa Laval Q-doc secures a perfect match every time and prevents potential oversights that could necessitate revalidation.
Pharmaceutical water system chart
How it works
LKH UltraPure construction
The pump consists of a motor, impeller, pump casing, back plate, mechanical seal, legs, pump shaft/connections and adaptor.
Inside the pump casing, the semi-open impeller rotates along with the pump shaft. The rotation of the impeller blades convey energy to the fluid causing it to move in a circular direction. The movement of the fluid increases in velocity; the velocity of the fluid is partly converted into pressure before it leaves the pump through the outlet.
Unique impeller design
LKH UltraPure centrifugal pumps feature a unique semi-open impeller with a special vane design that ensures particularly low NPSHr (Net Positive Suction Head required). This helps prevent the effects of cavitation and minimizes the risk of mechanical damage.
The semi-open impeller also features balance holes, which provide excellent circulation of process fluid in the shaft seal area and help reduce axial force on the impeller. This reduces wear on the shaft seal and the motor bearings.
The semi-open impeller design provides high flow all around the pump, especially behind the impeller near the shaft seal. This contributes to easy cleanability and enhanced lubrication and cooling of the shaft seal.
External shaft seal
With few wear parts, the front-loaded external shaft seal is designed for high performance and low maintenance. There is no need to disconnect or remove the pump casing for inspection or maintenance, which saves time and money and minimizes downtime. Only five minutes are required to replace the shaft seal.
Perfect sealing and lubrication largely depends on the flatness of the seal faces. All LKH UltraPure pumps have shaft seals that are machined according to stringent requirements and meet the flatness requirement of 3 light bands* or less. The stationary seal ring is solidly affixed to the back plate, providing perfectly aligned seal surfaces even after long periods of operation and potential pressure shocks or vibration in the system.
The balanced design and use of spring force contribute to pressure equalization within the shaft seal area. This minimizes the risk of opening during unforeseen events, such as pressure shock. Alfa Laval uses the same shaft seal for all UltraPure centrifugal pumps, regardless of size or model. This standardization reduces inventory and makes wear parts replacement quick and easy.
*Measured at 20°C, one light band corresponds to 0.3 µm flatness over the entire sealing surface.
Defined O-ring groove providing firm positioning of the O-ring on pump casing and metal to metal contact provides a predefined compression of the O-rings with no crevices for contaminants.
External shaft seal with few wear parts and spring mounted on the atmospheric side, meaning no wear of the spring or other internal parts going into your product.
360° Service and maintenance videos
Alfa Laval LKH centrifugal pumps – change flushed shaft seal
Alfa Laval LKH centrifugal pumps – change single shaft seal
Alfa Laval LKH centrifugal pumps double mechanical shaft seal
Alfa Laval Service Kits
Part of a broad pump range
- Alfa Laval LKH
- Alfa Laval LKH Evap
- Alfa Laval LKH Multistage
- Alfa Laval LKH Prime
- Alfa Laval LKHex
- Alfa Laval LKHI
- Alfa Laval LKHPF
- Alfa Laval LKHSP
- Alfa Laval MR
- Alfa Laval Solid C
Latest 'Close at hand' online version
Download the product models in Neutral or Native CAD file formats. It is also possible to download 3D PDF files.
Visit the animations site and take a look inside a product to see and understand how it works.
Ten top tips: Alfa Laval LKH pump range
To keep you updated on important sustainability issues and opportunities in your industry and processes.