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Alfa Laval LKH-SP Self Priming Pump

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The Premium Pump for Air and Gas Applications

LKHSP Self-priming Centrifugal Pump

Application
LKH-SPThe LKHSP self-priming centrifugal pump is specially designed for pumping liquids containing air or gas without loosing its pumping ability.
The pump is for use in food, chemical, pharmaceutical and similar industries.
The LKHSP self-priming pump can be used for emptying tanks, as CIP return pump and similar applications where there is a risk of air or gas mixing with the liquid in the suction line.
The pump is self-priming and is capable of creating a vacuum of 0.6 bar, depending of the pump size.

Standard design
Standard design The LKHSP pump consists of a tank, a NO non-return valve, a NC non-return valve, a tee and a standard LKH pump.
The self-priming pump is available in sizes LKHSP-10, LKHSP- 20, LKHSP-25, LKHSP-35 and LKHSP-40.

Shaft seals
The LKHSP self-priming 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. LKHSP self priming pump may also be equipped with a double mechanical shaft seal.

Materials
Product wetted steel parts: . . . . . . . . .Acid-resistant steel 1.4404 (316L).
Other steel parts: . . . . . . . . . . . . . . .Stainless steel 1.4301 (304).
Finish: . . . . . . . . . . . . . . . . . . . . . .Semi bright.
Product wetted seals: . . . . . . . . . . . .EPDM rubber.

Technical data
Max. inlet pressure: . . . . . . . . . . . . .1000 kPa (10 bar).
Temperature range: . . . . . . . . . . . . . .-10C to +100C.
Noise level (at 1m): . . . . . . . . . . . . . .60 - 80 dB (A).

Flushed seal:
Water pressure: . . . . . . . . . . . . . . . .Normally atmospheric (100 kPa 1 bar).
Water consumption: . . . . . . . . . . . . .0.25 -0.5 l/min.

Double mechanical seal:
Water pressure: . . . . . . . . . . . . . . . .1000 kPa (10 bar).
Water consumption: . . . . . . . . . . . . .0.25 -0.5 l/min.
Max. static pressure at the outlet: . . . .80 kPa (0.8 bar).

Note! If this pressure is higher than 80 kPa, the LKC-2 special valve will not work intentionally as the spring will not open the ball in the valve.

Frequency control is not possible. The system cannot work at lower rpm.

Motor
Standard 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.

Voltage and frequency
3 ~, 50 Hz, 220-240V /380-420VY ≤4 kW
3 ~, 60 Hz, 250-280V /440-480VY ≤4.6 kW
3 ~, 50 Hz, 380-420V /660-690VY ≥5.5 kW
3 ~, 60 Hz, 440-480V≥6.3 kW
LKHSP Pg1
LKHSP
LKHSP Flow Chart
 
Motor sizes
50 Hz: 1.5, 2.2, 3, 4, 5.5, 7.5, 11, 15, 18.5, 22 kW.
60 Hz: 1.75, 2.5, 3.5, 4.6, 6.3, 8.6, 12.5, 17, 21, 25 kW.

Ordering
Please see the LKHSP options pages in Ordering Leaflet.
Note!
- The self-priming pump can only be supplied in sanitary versions.
- For further details, see also IM 70818 and IM 70737.

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