Alfa Laval LKHex Centrifugal Pump

Applications

The LKHex pump is a highly efficient and economical centrifugal pump, which meets the requirements of the ATEX directive 94/9 IEC group II, categories 2 and 3, temperature class T3 and T4. LKHex is available in following sizes, LKHex-10, -15, -20, -25, -35, -40, -45, -50, -60, -70. The LKHex performance data are equal to the performance of LKH pump.

Standard design

The LKHex 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 a single shaft seal or a double mechanical shaft seal (DMS). The seal ring is in acid-resistant steel AISI 329 with sealing surface in silicon carbide and rotating seal rings in carbon or silicon carbide.

Technical Data

ALFA LAVAL, LKH PUMP, exMaterials
Product wetted steel parts: . . . . . . . . W. 1.4404 (316L).
Other steel parts: . . . . . . . . . . . . . . Stainless steel.
Finish: . . . . . . . . . . . . . . . . . . . . . Standard blasted
Product wetted seals: . . . . . . . . . . . EPDM, NBR, FPM and FEP.

Connections for DMS:
6mm tube/R 1/8″ (BSP) external thread.

Motor
Foot-flanged ATEX approved motor according to the IEC metric standard, 2 poles = 3000/3600 rpm. at 50/60 Hz.

Motor sizes
50-60 Hz: . . . . . . . . . . . . . . . . . . 1.5 – 75 kW.

Operating Data

Pressure
Max. inlet pressure:
LKHex 10-70: (50Hz) . . . . . . . . . . . . 1000kPa (10 bar).
LKHex 10-60: (60Hz) . . . . . . . . . . . . 1000kPa (10 bar).
LKHex 70: (60Hz) . . . . . . . . . . . . . . 500kPa (5 bar).

Temperature
Product temperature (T4): . . . .-10
°C to +80°C (NBR).
-10
°C to +110°C (EPDM, FPM, FEP).
Product temperature (T3): . . . .-10
°C to +80°C (NBR).
-10
°C to +110°C (EPDM).
-10
°C to +140°C (FPM, FEP).
Ambient temperature: . . . . . .-10
°C to +30°C

Double mechanical shaft seal (DMS):
Water pressure inlet,
LKH-10 to -70: . . . . . . . . . . .Max. 500 kPa (5 bar).
Water consumption: . . . . . . .0.25 -0.5 l/min.

Note that most of the dimensions depend on motor supplier and motor size. Non-dependent dimensions are equal to the dimensions for LKH.

Options Ordering
A. Impeller with reduced diameter.
B. Counter flanges, seal rings and bolts for flanged connections (industrial version).
C. Surface roughness, product wetted parts: R
a 0.8 µm.
D. Product wetted seals of Nitrile (NBR), Fluorinated rubber (FPM) or FEP.
E. Rotating seal ring of Silicon Carbide.
F. Impeller screw (standard for LKH-70)
G. Double mechanical shaft seal
Note! For further details, see also ESE02224.

Please state the following when ordering:
– Pump size.
– Connections.
– Impeller diameter.
– Motor size.
– Voltage and frequency.
– Flow, pressure, ambient and media temperature.
– Atmosphere ignition temperature.
– Group category and temperature class.
– Density and viscosity of the product.
– Options.

Keeping you processing

For more information about our products and services please get in touch!

JAMIE WETHERILL
Internal Sales Manager

Call: 01777 712101
Email: jamie.wetherill@moodydirect.com