LKH Pump
Applications
The LKH pump is a highly efficient and economical centrifugal pump, which meets the requirements of sanitary 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 consists of a motor, stub shaft, mechanical compression coupling (LKH-5 with pin bolts), adaptor, back plate, impeller, pump casing and shaft seal. (LKH-5 has clamp connection between pump casing and back plate). The LKH pump is designed for CIP with emphasis on large internal roundings and cleanable seals. The sanitary 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 in acid resistant 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.
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. LKH-90 4 poles = 1500/1800 rpm at 50/60 Hz.
Materials
- Productwettedsteelparts: . . . . . . . . .Acid-resistantsteel1.4404 (316L).
- Othersteelparts: . . . . . . . . . . . . . . .Stainlesssteel1.4301 (304).
- Finish: . . . . . . . . . . . . . . . . . . . . . .Semibright.
- Productwettedseals: . . . . . . . . . . . .EPDM rubber.
Technical data
- Max. inlet pressure:
- LKH-5: . . . . . . . . . . . . . . . . . . . . . .600kPa(6bar)
- LKH-10-70: . . . . . . . . . . . . . . . . . .1000kPa (10 bar)
- LKH-85-90: . . . . . . . . . . . . . . . . . .500kPa(5bar).
- Temperaturerange: . . . . . . . . . . . . . .-10°Cto+140°C(EPDM).
Flushed shaft seal:
- Water pressureinlet: . . . . . . . . . . . . .Max. 1 bar.
- Water consumption: . . . . . . . . . . . . .0.25-0.5l/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).
- Waterconsumption: . . . . . . . . . . . . .0.25-0.5l/min.
Connections for FSS and DMSS:
- R 1/8" (BSP) external thread.
- (LKH 85: 6mm tube/Rp 1/8").
Voltage and frequency
- 3~,50Hz,220-240V Δ/380-420VY ≤ 4kW
- 3~,60Hz, 250-280V Δ/440-480VY ≤ 4.6 kW
- 3~,50Hz, 380-420V Δ/660-690VY ≥ 5.5 kW
- 3~,60Hz, 440-480V Δ ≥ 6.4 kW
Motor sizes
- 50 Hz: 0.75-1.1-1.5-2.2-3-4-5.5-7.5-11-15-18.5-22-30- 37- 45- 55- 75- 90- 110 kW
- 60 Hz: 0.9-1.3-1.75-2.5-3.5-4.6-6.4-8.6-12.5-17-21 25- 35- 43- 52- 63- 86- 105- 125 kW.
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.