Submersible All Stainless Steel, Corrosion-resistant Pumps
LH-14, LH-W-14 series

Jun, 2019

LH-14/LH-W-14 series all stainless steel pumps, suitable for drainage of corrosive liquids in mines

Since its foundation in 1924 in Japan, 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. We are now launching our "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. Because this material is used, the LH-14/LH-W-14 series can handle corrosive acidic liquids and chemical liquids with low pH values.
The corrosion-resistant 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.

316 Stainless Steel Casting

Tsurumi puts particular effort into developing submersible pumps made of 316 stainless steel casting. In recent years, polluted water and runoff 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 runoff from mines is strongly acidic with a pH value of less than 4. To meet this application, Tsurumi has aggressively 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. That is, these pumps 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 therefore suitable for service in harsh environments such as mines and quarries, and can cover a wide range of applications.

pH Values and Corrosion Resistance of Tsurumi Pumps

The above data is a rough indication for sulfuric acid (H2SO4) and sodium hydroxide (NaOH).
Metals are affected by the type of acid/alkali, seal material, painting and abrasive environment.

All stainless steel pumps: LH-14/LH-W-14 series

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 it is 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.

Specifications

Model LH-14 (Single Impeller)
LH-W-14 (Dual Impellers)
Discharge Bore 80 - 200 mm
Motor Output 11 - 110 kW
Pumping Fluid Corrosive Liquids
Impeller Closed
MaterialImpeller 316 Stainless Steel Casting
Pump Casing 316 Stainless Steel Casting
Motor Frame 316 Stainless Steel Casting
Shaft 316 Stainless Steel
Rubber Parts FPM (FKM)

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. And 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. 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.

The OO series is indicated with our series code in this text.

Products

Corrosion-Resistant Pumps

High-Head Corrosion-Resistant Pumps (Single Impeller) Model : LH-14
High-Head Corrosion-Resistant Pumps (Dual Impellers) Model : LH-W-14

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