The latest offering in Tsurumi’s dewatering pump range is the LH-D submersible pump with double suction impeller. The new model is based on Tsurumi’s LH-series, a quality line of submersible high head drainage pumps used in the mining and construction fields.

The most notable feature of the new LH-D model is its ability to draw high volumes of water to meet the needs of open-pit/underground mining, heap leaching and large-scale tunneling work. The impeller and suction mouth are made of wear-resistant high-chromium cast iron to withstand harsh operating environments.

Source: Tsurumi

The LH-D features a two-pole 110/185 kW motor on which a double suction impeller is mounted. Large volumes of water are drawn from both sides of the impeller, reducing thrust loads, extending the service-life of bearings, and increasing the stability of pumping operations.

An anti-wicking cable prevents water incursion due to capillary action in the event of cable sheath damage or if the end of the cable is submerged. The pump is equipped with an inspection window at the bottom of the stuffing box to facilitate cable maintenance. Silicon carbide boards on the seal faces provide five times higher corrosion, wear and heat resistance than tungsten carbide.

Leakage sensors (electrode and float type) detect flooding in the incursion water storage chamber and oil chamber. When flooding is detected, signals are sent to operate the indicator lamps through the external control panel to warn operators.

The LH-D series comes in two pump models: the LH10110D (110 kW motor) with a 250 mm (10 in) discharge, delivers a maximum flow rate of 200 L/s (3170 US gpm) and maximum head of 63 m (206 ft). The LH12185D (185 kW motor) with a 300 mm (12 in) discharge, delivers a maximum flow rate of 233 L/s (3690 US gpm) and maximum head of 92 m (302 ft).