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Alfa Laval LKH Multi-stage Centrifugal Pump

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The Compact Pump

LKH-110 and LKH-120/P Multi-Stage Centrifugal Pump

Application
LKH MultistageLKH-110 and -120/P are highly efficient and economical multistage centrifugal pumps, which meet the requirements of sanitary and gentle product treatment and chemical resistance. Both the LKH-110 and the LKH-120/P are available in 3 sizes, LKH-112, - 113, -114 and LKH-122/P, -123/P, -124/P respectively, for 2, 3 and 4 stages.
 
Standard design
LKH-110 and -120/P consist of a motor, stub shaft with key, mechanical compression coupling, adaptor, back plate, impellers, pump casing, intermediate casing (3 or 4 stage), pump cover, impeller screw and shaft seal. The pumps are designed for CIP with emphasis on large internal roundings and cleanable seals. The sanitary versions of LKH-110 and -120/P have stainless steel shrouds for protection of the motor, and the complete unit is supported on four adjustable stainless steel legs.
 
Shaft seals
The pumps can be fitted with two types of mechanical seals:
 
- Single internal seal.
- Flushed seal.
- Sic/C material combination, outlet pressure up to 20 bar
- Sic/Sic material combination, outlet pressure up to 40 bar
Both seal types have stationary seal rings of silicon carbide and rotating seal rings of carbon or silicon carbide. The secondary seal of the flushed seal is a long lasting lip seal.
 
Materials
Product wetted steel parts: Acid-resistant steel, 1.4404 (316L) and Duplex steel
Other steel parts: Stainless steel, 1.4301 (304).
Product wetted seals: EPDM.
Other O-rings: EPDM.
Finish: Semi-bright.
 
Technical data
 
Max. outlet pressure, LKH-110/P, LKH-120/P:
- Limited by the strength of the pump casing: 4000 kPa (40 bar) temperature < 40 C.
- Limited by the strength of the pump casing: 2000 kPa (20 bar) temperature > 40 C.
Temperature range: -10C to +140C (EPDM).
Water pressure: Normally atmospheric, max. 1 bar (flushed seal).
Water consumption: 0.25 -0.5 l/min. (flushed seal)
Noise level (at 1 m): 60-80 dB (A).
 
Versions
LKHMS1
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 type, LKH-110:
- Standard motor with a fixed ball bearing on drive side.
 
Motor types, LKH-110/P and LKH-120/P:
- Special motor with special bearings.
 
Voltage and frequency
3 ~, 50 Hz, 220-240V Δ/380-420VY ≤ 4 kW
3 ~, 60 Hz, 250-280V Δ/440-480VY ≤ 4.6 kW
3 ~, 50 Hz, 380-420V Δ/660-690VY ≥ 5.5 kW
3 ~, 60 Hz, 440-480V Δ ≥ 6.3 kW
 
Motor sizes, LKH-110
50 Hz: 2.2, 3, 4, 5.5, 7.5, 11, 15, 18.5 kW.
60 Hz: 4.6, 6.3, 8.6, 12.5, 17, 21 kW.
 
Motor sizes, LKH-120/P
50 Hz: 30, 37, 45 kW.
60 Hz: 35, 43, 52, 64, 87 kW.
 
Options
- Special motor for inlet pressure higher than 10 bar (only LKH- 110).
- Motor for other voltage and/or frequency (only LKH-110).
- Motor with increased safety/flame proof motor.
- Flushed shaft seal.
- Impeller with reduced diameter.
- Counter flanges, seal rings and bolts for flanged connections (industrial version).
- Product wetted seals of Nitrile (NBR), or Fluorinated rubber (FPM).
- Rotating seal ring of Silicon Carbide.
 
Ordering
Please state the following when ordering:
 
LKH-110:
- If the inlet pressure is higher than 10 bar it is necessary to order a special version with a modified
motor and a stronger backplate. Use the following designation:
- LKH-110: Inlet pressure (0-10 bar)
- LKH-110/P: Inlet pressure > 10 bar
- Pump size.
- Version, sanitary or industrial.
- 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 IM 70777.
 
Dimensions (mm)
LKHMS2
Dimensions (mm)
LKHMS3
Flow chart
LKHMS4
Connections (mm)
LKHMS5
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