# LKH Centrifugal Pumps

Alfa Laval LKH Centrifugal Pump is 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.

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## Description

#### Application

The LKH pump is a highly efficient and economical centrifugal pump, which meets the requirements of hygienic and gentle product treatment and chemical resistance.

LKH is available in thirteen sizes, LKH-5, -10, -15, -20, -25, -35, -40, -45, -50, -60, -70, -85 and -90.

Standard design
The LKH pump is designed for CIP with emphasis on large internal radii and cleanable seals. The hygienic version of LKH 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 pump is equipped with either an external single or a flushed shaft seal. Both have stationary seal rings made from 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

Standard materials
Product wetted steel parts: . . . . . . . .W. 1.4404 (316L).
Other steel parts: . . . . . . . . . . . . . .Stainless steel.
Finish: . . . . . . . . . . . . . . . . . . . . .Standard blasted
Product wetted seals: . . . . . . . . . . .EPDM rubber.
Connections for FSS and DMSS: 6mm tube/Rp 1/8

Motors sizes
50 Hz: . . . . . . . . . . . . . . . . . . . . . 0.75 – 110 kW. 60 Hz: . . . . . . . . . . . . . . . . . . . . . 0.9 – 125 kW

Motor
Foot-flanged motor according to the IEC metric standard, 2 poles = 3000/3600 rpm at 50/60 Hz, 4 poles = 1500/1800 rpm at 50/60 Hz, IP 55 (with drain hole with labyrinth plug), insulation class F.
Min/max motor speed:
2 poles: 0,75 – 45 kW . . . . . . . . . . . 900 – 4000 rpm
2 poles: 55 – 110 kW . . . . . . . . . . . 900 – 3600 rpm
4 poles: 0,75 – 75 kW . . . . . . . . . . . 900 – 2200 rpm

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

Pressure
Max. inlet pressure:
LKH-5: . . . . . . . . . . . . . . . . . . . .600 kPa (6 bar).
LKH-10 – 70: . . . . . . . . . . . . . . . .1000kPa (10 bar).
LKH-70: 60Hz . . . . . . . . . . . . . . . .500kPa (5 bar).
LKH-85 – 90: . . . . . . . . . . . . . . . .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-5 to -60: . . . Max. 500 kPa (5 bar).
Water pressure inlet, LKH-70 and -90: Max. 300 kPa (3 bar).
Water consumption: . . . . . . . . . . . . 0.25 -0.5 l/min