LKH | Alfa Laval

LKH

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.

LKH离心泵-LKH centrifugal pump

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 up to 50% compared to similar mid-range pumps.

Cleanability 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.

Warranty

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

Product Benefits

  • High efficiency
  • Hygienic design
  • Low energy consumption

Product catalogue

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Pump range

LKH centrifugal pumps are currently available in 13 sizes to handle capacities up to 500 m3/hour and pressures up to 190 H/(m). Options include types of shaft seals, flushing arrangements and elastomers.

LKH pump curves

 LKH pump range, composite curve

Unique impeller design

The semi-open impeller with a special vane design ensures particularly low NPSHr (Net Positive Suction Head required). This helps prevent cavitation and minimizes the risk of mechanical damage.

Balance holes in the impeller enhance circulation around the shaft seal and reduce axial forces. This minimizes wear on the shaft seal and motor bearings.

External shaft seal

With the spring and washers mounted on the atmospheric side, the front-loading shaft seal contributes to fast, easy and inexpensive maintenance. It takes just a few minutes to replace the shaft seal. Its balanced design minimizes the risk of seal opening during unforeseen pressure shock.

Optimized shaft seal

One shaft seal fits a wide pump range. The same LKH single shaft seal fits most LKH pump models and all SolidC pump models. Interchanging the seal with either an optional single or double flushed shaft seal takes minutes using a few extra components, thereby reducing inventory and making wear parts replacement quick and easy. 

Compression coupling

The compression coupling securely attaches the stub shaft to the motor shaft with precision alignment. Setup is simple, operations secure, noise and vibration minimized, and the service life of both the shaft seal and motor prolonged.

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