The 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

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 selfpriming.


How It Works

Pump range

LKH centrifugal pumps are currently available in 13 sizes to handle capacities up to 500 m3/hour and pressures up to 190 H/(m). Options include types of shaft seals, flushing arrangements and elastomers.

LKHSP for self-priming applications

This self-priming pump is designed for use as a CIP return pump or for tank drainage since it is capable of transporting products with entrained gas.

LKH pump range, composite curve

Unique impeller design

The semi-open impeller with a special vane design ensures particularly low NPSHr (Net Positive Suction Head required). This helps prevent cavitation and minimizes the risk of mechanical damage.

Balance holes in the impeller enhance circulation around the shaft seal and reduce axial forces. This minimizes wear on the shaft seal and motor bearings.

External shaft seal

The front-loading shaft seal, with the spring and washers mounted on the atmospheric side, makes maintenance fast, easy and inexpensive. It takes just a few minutes to replace the shaft seal. In addition, the balanced design minimizes the risk of seal opening during unforeseen pressure shock.

Optimised shaft seal

One shaft seal fits a wide pump range. The exact same LKH single shaft seal fits 11 models of LKH pumps as well as all models of the SolidC pump. The LKH seal also has the option of single or double flushed, which can be interchanged in minutes with just a few extra components.

This standardization reduces inventory and makes wear parts replacement quick and easy.

Compression couplings

Another notable feature is the compression coupling. This securely attaches the stub shaft to the motor shaft with precision alignment. Setup is simple, operations secure and noise and vibration minimized. What’s more, the coupling helps prolong the service life of both shaft seal and motor.

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