Corrosion-resistant submersible success

LH-14 series (Single impeller).
LH-14 series (Single impeller).
LH-W-14 series (Dual impellers).
LH-W-14 series (Dual impellers).

Polluted water and run-off from mines and quarries require pumps that can handle these highly acidic liquids. To meet this challenge, Tsurumi has continued developing its range of submersible pumps that are made of 316 stainless steel casting.

Since its foundation in 1924, the Japanese company Tsurumi Manufacturing Co., Ltd. has been engaged in the manufacture, supply and sales of pumps, environmental devices and related equipment, with submersible pumps being key products.  As well as producing general drainage pumps, Tsurumi puts great effort into applications for difficult-to-handle liquids, such as corrosive and high temperature liquids and seawater. The company is now launching its LH-14/LH-W-14 series corrosion-resistant pumps, which are suitable for drainage of corrosive liquids in mines.

Tsurumi’s submersible corrosion-resistant pumps are made of 316 stainless steel, allowing the LH-14/LH-W-14 series to handle corrosive acidic liquids and chemical liquids with low pH values. These pumps use highly corrosion-resistant materials for all parts that are exposed to fluids, including the impeller, pump casing, motor frame, outer cover, strainer stand and flange,  so that the pumps are thoroughly protected from corroding. Stainless steel  Tsurumi puts particular effort into developing submersible pumps made of 316 stainless steel casting. Recently, polluted water and run-off from mines and quarries have been cited as social problems in many countries, to the point that demand for pumps that can handle these liquids has been increasing year by year. In fact, more than 40% of the run-off from mines is strongly acidic with a pH value of less than 4. To meet this application, Tsurumi has continued development of all stainless steel pumps that are made of 316 ­stainless steel casting.

Because they are made of stainless steel casting, the pumps are resistant to wastewater containing abrasive substances, as well as corrosive liquids. These pumps have been designed to deliver the durability needed in harsh fields where pumps made of aluminium, stainless steel and cast iron suffer damage in a matter of weeks, if not days. Stainless steel casting considerably improves product ­reliability in comparison with ­stainless steel in applications involving heavy-duty work. Tsurumi’s all stainless steel pumps are intended for service in harsh ­environments such as mines and quarries and can cover a wide range of applications.

The LH-14/LH-W-14 series is a submersible stainless steel casting high head corrosion-resistant pump designed for handling aggressive and corrosive liquids. The all wetted parts are made of 316 stainless steel, enables it to withstand demanding conditions found in construction, aggregate and mining applications. Being the pump cylindrical and slim, it can be installed in a well casing for deep well dewatering. 

The center flange construction assures a stable installation even if fixed by the discharge pipe. The pump incorporates seal pressure relief ports that prevent the pumping pressure from applying to the shaft seal. Furthermore, to endure even extended operation at low water level, these pumps feature flow-thru design that forcibly cools down the motor.

The LH-14 series has a single impeller, and the LH-W-14 series has dual impellers. The LH-14 and LH-W-14 series are available in a wide product lineup, covering a discharge bore diameter of 80 to 200 mm, motor output of 11 to 110 kW, and maximum head of 51.8 to 184 m.

These pumps, as well as Tsurumi’s general drainage pumps, are equipped with an anti-wicking cable, motor protector, SiC dual inside mechanical seals with silicon carbide faces, and Oil Lifter, with extensive research and a track record accumulated over many years combined into Tsurumi ­original technologies. 

The material used for rubber parts such as the mechanical seal, oil seal, O-ring and packing, is FPM (FKM), which provides high resistance to heat and chemical exposure. With these features, Tsurumi pumps are designed to provide high reliability and excellent ­durability, enabling continuous operations for long periods.

Experience and expertise  Making skillful use of the experience and expertise of many years, Tsurumi focuses on the development of products that can withstand demanding applications. Tsurumi offers a range of products that can serve in harsh conditions such as draining high temperature liquids and seawater as well as corrosive liquids. To order our products, please contact us direct. •