LKH Multistage centrifugal pumps are designed to suit the hygienic standards of the dairy, food & beverage and personal care sectors, increasing process productivity while maintaining high efficiency and gentle product handling.
The Alfa Laval LKH Multistage is commonly selected when standard single-stage centrifugal pumps cannot deliver sufficient pressure without installing multiple booster pumps in series. By combining multiple impellers in one compact pump design, the LKH Multistage reduces system complexity, footprint and energy losses.
Related Industries
Beverage Processing, Biotechnology, Food Processing, Home Care, Personal Care
The LKH Multistage is mostly selected for hygienic systems requiring high pressure delivery without installing multiple booster pumps.
Benefits include energy efficiency, hygienic design, high inlet pressure and reduced need for serial pump installations.
Materials
Motor
Foot-flanged motor according to the IEC metric standard, 2 poles = 3000/3600 rpm at 50/60 Hz, IP 55 (with drain hole with labyrinth plug), insulation class F.
Standard motors with a fixed ball bearing on drive side are fitted to LKH-110 pumps whereas special motors with special bearings are required for LKH-110P and LKH-120P pumps.
All media contacting steel components like pump casing parts, impellers and backplate are in W. 1.4404 (AISI 316L). A stainless steel shroud protects the motor and four adjustable stainless steel legs support the complete unit. As standard, the LKH multistage pump is equipped with an internal single mechanical shaft seal but is also available with a flushed shaft seal.
The secondary seal of the flushed seal is a long-lasting lip seal. The front loading shaft seal makes maintenance fast, easy and inexpensive. It takes just a few minutes to replace the shaft seal. In addition, the balanced design minimizes the risk of seal opening during unforeseen pressure shock.
The LKH centrifugal pumps are available in 13 sizes, capable of handling capacities up to 500 m3/hour and pressures up to 190 H/(m). They are designed for high-pressure applications, such as reverse osmosis and ultrafiltration processes, saving floor space. The pump features a unique impeller design with a semi-open impeller with a special vane, ensuring low NPSHr and reducing mechanical damage. The front-loading shaft seal is fast, easy and inexpensive, making maintenance quick and easy.
The LKH single shaft seal fits 11 models of LKH pumps and all models of the SolidC pump and can be interchanged in minutes with just a few extra components. The compression coupling secures the stub shaft to the motor shaft with precision alignment, minimizing noise and vibration and prolonging the service life of both shaft seal and motor.
FAQ
Does the LKH Multistage support 50 Hz and 60 Hz operation and does it change performance?
Yes. LKH Multistage is available for 50 Hz and 60 Hz installations. Because pump speed changes with frequency, the achievable flow and differential pressure will also change, so the correct model and curve should be selected based on your site frequency and duty point.
What do ISO 2037, DIN and SMS mean for LKH Multistage hygienic installations and is it suitable for CIP?
ISO 2037, DIN and SMS are common hygienic connection and installation standards used in process plants. LKH Multistage is designed for Cleaning in Place, CIP and it can be configured to match the plant standard depending on the required connection type and hygienic specification.
Why is LKH Multistage often used for reverse osmosis and ultrafiltration systems and when can it replace booster pumps?
LKH Multistage is typically selected for high pressure duties at lower capacity, such as membrane filtration feed, reverse osmosis and ultrafiltration. In systems where pressure demand would normally require multiple booster pumps in series, a multistage pump can reduce installation footprint, simplify the line and reduce the number of maintenance points.
Alfa Laval LKH Case Study – Dairy Manufacturer in Denmark
Looking for a high-efficiency pump for demanding applications? The Alfa Laval LKH Multistage delivers superior pressure and hygienic performance. Contact us today to find the perfect solution for your system!
