Tsurumi Pump Lhw High Head Drainage Pumps Instruction Manual

LHW High Head Drainage Pumps
Instruction Manual

Submersible High Head Drainage Pumps

Tsurumi LH/LH-W series pumps are submersible heavy-duty pumps specialized for high head. These pumps are available in a wide lineup, offering 4 to 150HP motor output and 59 to 755ft. maximum head. The LH/LH-W series has played an active role in various fields, from small/medium-scale civil engineering and construction work that requires high reliability, to large-scale projects for constructing tunnels, bridges and dams. And, because of the slim body, these pumps have particularly helped to drain mine pits where required to work in limited space.
So that they can stand up to harsh environment, these pumps have the impeller and mouth ring made of high-chromium cast iron that provides high wear resistance. The pump is equipped with seal pressure relief ports* that release pump pressure applied to the mechanical seal. Furthermore, to endure even extended operation at low water level, these pumps feature flow-thru design that forcibly cools down the motor. With these features, Tsurumi pumps provide excellent reliability and durability that enables continuous duty for long periods of time. * excluding 4HP
Available as optional specifications are a proprietary “seawater-resistant pump” developed over many years by Tsurumi to enable seawater intake/drainage for long periods of time, and an “all stainless steel pump” using 316 stainless steel for mining markets.
LH: Lineup of pumps with high head in consideration of discharge volume.
LH-W: Comprised of dual impellers for extra high head.
Tandem operation model: Same model pumps are connected in series, to deliver higher head.
Model Number Designation

Options

Seawater-resistant version; …………. Galvanic anode & Special impeller
High temperature liquid version;……………. Max. 194ºF
High voltage version;………………… Max. 1000V
All stainless steel version; ………………..316 S.S.
Top Discharge, Flow-thru Design
This design provides maximum motor cooling efficiency allowing continuous operation at low water levels and extended dry-run capability, and also allows the shape of the pump to be cylindrical and slim for installation in a well casing for deep well dewatering.

1. Anti-wicking Cable Entry
   Prevents water incursion due to capillary wicking should the power cable be damaged or the end submerged.
2. Motor Protector
   CTP (30HP and below) Detects excess heat, therefore, protecting the pump against overheating and dry-running. MTP (40HP and above) React to excessive heat caused by dry-running. The bimetal strip opens to cause the control panel to shut the power supply.
3. Dual Inside Mechanical Seals with Silicon Carbide Faces
   Isolated in the oil chamber where a clean, non-corrosive and abrasion-free lubricating environment is maintained. Compared with the water-cooled outside mechanical seal, it reduces the risk of failure caused by dry-heating and adhering matter. The Silicon carbide provides 5 times higher corrosion, wear and heat resistance than the tungsten carbide.
4. Oil Lifter [Patented]
   Provides lubrication and cooling of the seal faces down to 1/3 of normal oil level, thus maintaining a stable shaft sealing effect and prolonging seal life longer.

Seawater-Resistant Kit
Tsurumi’s pumps can be combined with a seawater-resistant kit (optional) that adds a “galvanic anode” and “seawater-resistant special cast iron impeller,” and enables about two years of service. (The service period depends on operating conditions.)
All Stainless Steel Pump
All of the parts of Tsurumi’s pumps that contact fluid, including the impeller, pump casing, motor frame, outer cover, strainer stand, and flange, can be made in 316 stainless steel. Tsurumi’s all stainless steel pump can handle corrosive fluids generated in mines or quarries, and fluids of unexpectedly high pH. For details, contact your dealer.
5. Leakage Sensor (75HP and above)
Detects flooding into the oil chamber that may occur in a worst case scenario. When flooding is detected, signals are sent to operate the indicator lamps through the external control panel.
6. Seal Pressure Relief Ports (excluding 4HP)
Protect the mechanical seal from pump pressure. They also protect the seal face by discharging wear particles.
7 .High-chromium Cast Iron Closed Impeller & Mouth Rings
Resists wear caused by abrasive particles and enables the pump to maintain its original performance for an extended period of time. LH: Single impeller LH-W: Dual impellers
8. Galvanic Anodes (excluding 4HP)
Protect the pump against corrosive potential generated during the drainage of wastewater.

LH -Single Impeller-

The LH-series is a submersible three-phase cast iron high head drainage pump. 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 top discharge, flow-thru design provides maximum motor cooling efficiency allowing continuous operation at low water levels and extended dry-run capability. The pump incorporates seal pressure relief ports that prevent the pumping pressure from applying to the shaft seal.*
* excluding LH33.0

1 Star-Delta available upon request
*2 Weights excluding cable
Performance Curves
< High Head >
LH-W -Dual Impellers-
The LH-W-series is a submersible three-phase cast iron extra high head drainage pump having dual impellers. 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.*1 The top discharge, flow-thru design provides maximum motor cooling efficiency allowing continuous operation at low water levels and extended dry-run capability. The pump incorporates seal pressure relief ports that prevent the pumping pressure from applying to the shaft seal.*2
*1 excluding LH4110W
*2 excluding LH23.0W

Performance Curves
< 4-40HP >

Tandem operation

“Tandem operation” is an operation method that connects two pumps of the same model in series. This provides double pump head at the same flow rate in comparison with that of a single pump. The principle of tandem operation is the same as that with multistage pumps.
Precautions for Selection and Use
For model selection, piping and installation procedure, be sure to consult Tsurumi distributors in advance.

1. If the required total head exceeds the maximum head of the pump without the intermediate connection pipe shown in the selection table, insert a intermediate connection pipe of a length corresponding to the excess amount or more, to reduce the pressure applied to the pump in the upper stage.
2. Check the approximate weight of one pump and the allowable load for two eyebolts (per pump) shown in the selection table, and determine the piping weight, installation method and lifting procedure so that the allowable load is not exceeded.
3. The pump in the lower stage should be installed at the bottom of the vertical hole, unless special measures are taken. Do not suspend the pump in midair. Do not allow the weight of the upper pump and piping to be applied to the lower pump.
4. Since a certain amount of water spouts from the seal pressure relief port,* both the upper- and lower-stage pumps should be installed in the vertical hole. Do not use the pumps as booster pumps in the middle of a horizontal line lying on the ground. * excluding LH33.0 and LH23.0W
5. Do not connect pumps of different models in series. Do not use either of two connected pumps singly. Failure to observe these instructions may change the operating point improper, resulting in trouble.

Tandem Operation -LH / LH-W-

“Tandem operation” is an operation method that connects two pumps of the same model in series. This provides double pump head at the same flow rate in comparison with that of a single pump. The principle of tandem operation is the same as that with multistage pumps. The LH and LH-W series pumps adopt the center flange construction to align the discharge pipe with the cylindrical pump center axis.* Connecting the pumps in series with the tandem connector can provide higher pump head without affecting the advantage of the slim design. At construction sites, there are many cases where a higher pump head is required as construction work progresses. In such cases, the addition of a tandem pump may meet the required pump head, instead of using a new pump.
* Available as an option for separately purchased LH33.0 and LH23.0W.
LH23.0W for Tandem Operation

Performance Curves

REMARKS:
The intermediate connection pipe is not required in the range indicated as a bold line on curves. If the required total head exceeds the maximum head of the pump without an intermediate connection pipe (indicated as dashed line), an intermediate connection pipe of a length corresponding to the excess amount or more is equired.

Specifications

We reserve the right to change the speciffcations and designs for improvent without prior notice

BUILT FOR WORK
1625 Fullerton Court, Glendale Heights, IL 60139
Tel: 1-888-878-7864
Fax: 1-630-793-0146
www.tsurumipump.com
 [email protected]

References

• BUILT FOR WORK® | Tsurumi Pump