The Alfa Laval LKH pump is a highly efficient and economical centrifugal pump. It is very popular all over the world like Germany, USA, Italy, UK etc. It can meet 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 Alfa Laval LKH pump is designed for CIP with emphasis on large internal radii and cleanable seals. The hygienic version of LKH pump has a SUS shroud for protection of the motor, and the complete unit is supported on four adjustable SUS legs.
The LKH pump is equipped with either an external single or a flushed shaft seal. Both of them 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 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 rubber
Connections for FSS and DMSS: 6mm tube/Rp 1/8″
Motor 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.
Operating Data
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.
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Post time: Sep-30-2022