Alfa Laval LKH Evap Centrifugal Pump

Applications

The LKH Evap pump is a highly efficient and economical centrifugal pump, which meets the requirements of hygienic and gentle product treatment and chemical resistance. LKH Evap is specially designed for use in the evaporation industry covering applications as liquid concentration and powder processing solutions as well as dewatering plant and equipment for the international dairy, food and beverage, ethanol, starch, pharmaceutical, chemical, alcohol and brewery industries. LKH Evap is available in ten sizes, LKH Evap-10,-15, -20, -25, -35, -40, -45, -50, -60 and -70.

Standard design

The LKH Evap pump is designed for CIP with emphasis on large internal radii and cleanable seals for use in the Evaporator industry and can be delivered with Clear Flow Impeller as an option. The Clear Flow Impeller is to be used in applications where there is a risk of building up a hard layer of product between impeller and backplate. The LKH Evap has a stainless steel shroud for protection of the motor, and the complete unit is supported on four adjustable stainless steel legs.

Shaft seals

The LKH Evap pump is equipped with either an external single or a flushed shaft seal. Both have stationary seal rings in stainless steel AISI 329 with sealing surface in silicon carbide and rotating seal rings in carbon. The secondary seal of the flushed seal is a long lasting lip seal. The pump may also be equipped with a double mechanical shaft seal.

Technical Data

Materials
Product wetted steel parts: . . . . . . . . W. 1.4404 (316L).
Other steel parts: . . . . . . . . . . . . . . Stainless steel.
Finish: . . . . . . . . . . . . . . . . . . . . . Standard blasted.
Product wetted seals: . . . . . . . . . . . EPDM.

Connections for FSS and DMSS:
6mm tube/Rp 1/8″.

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.

Motor sizes
50 Hz: . . . . . . . . . . . . . . . . . . . . . 1.5 – 75 kW.
60 Hz: . . . . . . . . . . . . . . . . . . . . . 1.75 – 86 kW.

Warranty
Extended 3-years warranty on LKH Evap pumps. The warranty covers all non wear parts on the condition that genuine Alfa Laval Spare Parts are used.

Operating Data

Pressure
Max. inlet pressure:
LKH Evap-10/-70: . . . . . . . . . . . . . 1000kPa (10 bar).
LKH Evap-70: 60Hz . . . . . . . . . . . . 500kPa (5 bar).

Temperature
Temperature range: . . . . . . . . . . . . . -10°C to +140°C (EPDM).

Flushed shaft seal:
Water pressure inlet: . . . . . . . . . . . . Max. 1 bar.
Water consumption: . . . . . . . . . . . . 0.25 -0.5 l/min.

Double mechanical shaft seal:
Water pressure inlet:
LKH Evap-10/-60: . . . . . . . . . . . . . Max. 500 kPa (5 bar).
LKH Evap-70: . . . . . . . . . . . . . . . . Max. 300 kPa (3 bar).

Water consumption: . . . . . . . . . . . . 0.25 -0.5 l/min.

Note: If Clear Flow impeller is mounted the performance can be up to 10% lower than shown on the curves above.

Pump Specific Measures

Motor Specific Measures

*Possible to reduce dimension F by min. 59 mm for all pump models. For smaller models it will be possible to reduce dimension F even further

Motor Overview

Dimensional data are based on 2 pole, ABB motors.

Connections

* Other dimensions available on request

Options
A. Impeller with reduced diameter.
B. Motor for other voltage and/or frequency.
C. Motor with increased safety/flame proof motor.
D. Inducer (only LKH Evap 10 to -50).
E. Flushed shaft seal.
F. Double mechanical shaft seal.
G. Clear Flow Impeller. Special designed impeller for applications where there is a risk of building up a hard layer of product between impeller and backplate.
H. Surface roughness, product wetted parts: Ra ≤ 0.8 µm.
I. Product wetted seals of Nitrile (NBR), Fluorinated rubber (FPM) or FEP.
J. Rotating seal ring of Silicon Carbide.

Ordering
Please state the following when ordering:
– Pump size.
– Connections.
– Impeller diameter.
– Motor size.
– Voltage and frequency.
– Flow, pressure and temperature.
– Density and viscosity of the product.
– Options.
Note! For further details, see also instruction manual.