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Single-phase Portable Pumps NK Series

Single-phase Portable Pumps NK Series are compact and lightweight, so they are very easy handle and carry. Available in an extensive lineup of motor outputs ranging from 0.1 to 2.2kW, these pumps are suited for a wide range of applications besides general pumping and drainage, including slurries, residues and household uses.

Though compact in size, these pumps pack a host of original technologies that Tsurumi has tested and proven over many years, including the anti-wicking cable, inside mechanical seal with silicon carbide face and Oil Lifter*, etc. Additionally, key components that are prone to wear are made of durable materials and pumps as a whole are designed for continuous duty. For these reasons, Tsurumi single-phase portable pumps are a popular choice at civil engineering, construction and other work sites that demand high reliability.

SINGLE-PHASE PORTABLE PUMPS NK SERIES

          Tsurumi has been manufacturing construction dewatering pumps for more than 50 years. This has led to numerous technologies and know-how
for improving the durability and maintainability of pumps in the rental and construction markets where rugged work environments demand heavy-duty specifications. All of Tsurumi’s pumps are designed and built to be durable and reliable so as to serve users dependably.

Feature

Selection Table

Selection Table

Submersible

Non
Submersible

Submersible

Drainage Slurry Residue Drainage Residue Domestic
LB HS HSD HSR NK LSC LSP FAMILY
Discharge Bore

mm

50(80) 50 • 80 50 50 50 • 80 25 25 15, 25
Motor Output

kW

0.48 - 1.5 0.4 • 0.75 0.55 0.4 1.5 • 2.2 0.48 0.48 0.1
Discharge
Design
Top
Discharge
Flow-Thru

       

Side Flow        

     
Side Discharge  

       
Automatic Operation LB-A
(Electrodes)
HSZ
(Float)
- - - - - FAMILY-A
(Cylindrical Float)
Page No. 7 - 8 9 - 10 11 - 12 13 - 14 15 - 16 17 - 18

Motor Cooling & Dicscharge Design

Top Discharge, Flow-Thru Design
(LB , LB-A , LSC , FAMILY , FAMILY-A)
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.

Top Discharge, Side Flow Design
(NK)
This design assures efficient motor cooling even if the pump runs with its motor exposed to air, and also allows the overall diameter of the pump to be reduced for installation in  confined spaces.

Side Discharge, Spiral Design
(HS , HSZ , HSD , HSR)
The pump has a spiral pump casing that facilitates smoother passage of foreign objects like mud and soil contained in the pumped liquid. It is a simple and practical design that facilitates inspection and repair work.

Automatic Operation

The automatic model only operates when sufficient water is present. It not only reduces power consumption but also extends the life of wear parts of the pump as it eliminates dry-running that causes early wear-out.

Float Switch (HSZ / FAMILY-A)
This automatic operation system is controlled by a float switch. When the water level rises and raises the float switch to a preset level, the switch turns on, and the pump starts. When the water level lowers to the preset level, pump operation stops.

NK -Larger Output Pumps-

       The NK-series is a submersible single-phase portable drainage pump having a larger output motor. Though it is a single-phase unit, the pump has the durability equivalent to three-phase drainage pumps, since the wear parts are made of abrasion-resistant materials. The slim design allows the pump to be placed in a confined space.

• Side Flow Design
• Anti-wicking Cable Entry
• Motor Protector
• Dual Inside Mechanical Seal
• Oil Lifter
• V-ring / Oil Seal
• Cable Clip*
    * excluding NK3-22L

Model Discharge
Bore
mm
Motor
Output
kW
Phase Starting Method Solids
Passage
mm
Dry Weight
kg
Cable Length
m
NK3-15 50 1.5 Single Capacitor Start 8.5 29 10
NK4-22 50 2.2 Capacitor Start
+ Capacitor Run
8.5 29 10
NK3-22L 80 2.2 Capacitor Start
+ Capacitor Run
8.5 40 10

• Male threaded coupling for pipe connection available on special request
• Weights excluding cable

Dimensions

Unit: mm

Model A B D H W1
NK3-15 243 546 240 614 80
NK4-22 243 546 240 614 80
NK3-22L 236 601 216 669 120

Performance Curves

Structure

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1.Anti-Wicking Cable Entry
Prevents water incursion due to capillary action should the cable sheath be damaged or the end of cable submerged. Also prevents moist air from infiltrating the motor housing and condensation from forming inside the housing due to temperature differences between the housing and outside air.

2. Motor Protector
MTP (0.48kW and below)
Detects excess heat, therefore, protecting the pump against overheating and dry-running.
CTP (0.55kW and above)
Directly cuts the motor circuit if excessive heat builds up or overcurrent occurs in the motor.

3.Dual Inside Mechanical Seals with Silicon Carbide Face
Inside Mechanical Seal with Silicon Carbide Face (FAMILY)
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
* Not available for FAMILY
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. The Oil Lifter is Tsurumi original design.

 

5.V-Ring / Oil Seal (excluding HS(Z/R)2.4S, FAMILY)
Used as a “Dust Seal”, they protect the mechanical seal from abrasive particles.

6.Cable Clip (excluding NK3-22L, LSP, FAMILY)
Prevents unexpected water incursion that can occur if the cable is damaged, by protecting the cable against the tugging and rough handling found at construction sites.

7.Agitator
For HS and HSZ
Prevents the air lock that tends to take place on vortex or semi-vortex pumps.
For HSD
Assists the pump in sucking and transferring bentonite slurry, slime, mud, and water with high sand content.

8.Resin-made Stand (HS / HSZ / HSD)
Rubber Stand (HSR / LSC / LSP)
Prevents scratching of floor surface.

9.Multi-Directional Hose Coupling (LB / LB-A / HSR / LSC)
Can be configured for inclined or vertical discharge, allowing for smoother installation.

Specifications

Series LB/LB-A , HS/HSZ/HSD/HSR , NK , LSC , LSP ,FAMILY/FAMILY-A

  LB LB-A
Automatic
HS HSZ
Automatic
LB-480 LB-800 LB-1500 LB-480A LB-800A HS2.4S HS2.75S
HS3.75S
HSZ2.4S HSZ2.75S
HSZ3.75S
PUMP Discharge Bore
mm
50 50(80) 50 50(80) 50 50
80
50 50
80
Discharge Connection Hose Coupling
Solids Passage
mm
6 7
Impeller Semi-vortex Semi-open Semi-vortex
Urethane Rubber High-chromium Cast Iron Urethane Rubber
V-Ring / Oil Seal Nitrile
Butadiene
Rubber
Nitrile
Butadiene
Rubber
Nitrile
Butadiene
Rubber
Casing Synthetic Rubber Gray
Cast Iron
Ductile
Cast Iron
Gray
Cast Iron
Ductile
Cast Iron
Shaft Seal Dual Inside Mechanical Seals (with Oil Lifter)
Silicon Carbide
Agitator Sintered Alloy
MOTOR Type Continuous-duty Rated. Dry-type Induction Motor
Output
kW
0.48 0.75 1.5 0.48 0.75 0.4 0.75 0.4 0.75
Phase Single-phase
Pole 2
Insulation E B E
Starting Method Capacitor Run Capacitor
Start
Capacitor Run
Motor Protector
(built-in)
MTP CTP MTP CTP MTP CTP MTP CTP

ml

Lubricant
155 350 155 160
Turbine Oil (ISO VG32)
Shaft 403 Stainless Steel

m

Cable
5 10 5
PVC Chloroprene
Rubber
PVC
Automatic Control Device Electrodes Float Switch
Dry Weight*
kg
10.4 13.1 33 11 13.7 11.3 16.4
16.8
11.3 16.4
16.8

* Weights excluding cable

  HSD
Slurry
HSR
Residue
NK LSC
Residue
LSP
Residue
FAMILY FAMILY-A
Automatic
HSD2.55S HSR2.4S NK3-15 NK4-22 NK3-22L LSC1.4S LSP1.4S FAMILY-12 FAMILY-12A
PUMP Discharge Bore
mm
50 80 25 15. 25
Discharge Connection Hose Coupling
Solids Passage
mm
9 3 8.5
Impeller Semi-vortex Semi-open Semi-vortex
High-chromium
Cast Iron
Urethane
Rubber
Dcutile Cast Iron High-chromium
Cast Iron
Urethane Rubber Glass-fiber Reinforced Resin
V-Ring / Oil Seal Nitrile Butadiene Rubber Nitrile Butadiene Rubber
Casing Ductile Cast Iron Synthetic Rubber Gray Cast Iron Synthetic Rubber Resin
Shaft Seal Dual Inside Mechanical Seals (with Oil Lifter) Inside Mechanical Seal
Silicon Carbide
Agitator High-chromium
Cast Iron
MOTOR Type Continuous-duty Rated, Dry-type Induction Motor
Output
kW
0.55 0.4 1.5 2.2 0.48 0.1
Phase Single-phase
Pole 2
Insulation E F B E
Starting Method Capacitor Run Capacitor Start Capacitor Start
+ Capacitor Run
Capacitor Run
Motor Protector
(built-in)
CTP MTP CTP MTP

ml

Lubricant
160 270 155 150 30
Turbine Oil (ISO VG32) Liquid Paraffin (ISO VG15)
Shaft 403 Stainless Steel 420 Stainless Steel 403 Stainless Steel 420 Stainless Steel

m

Cable
5 10 5 3
PVC Chloroprene Rubber PVC
Automatic Control Device Cylindrical Float Switch
Dry Weight* kg 14 10.8 29 40 12 16.5 3.4 3.6

* Weights excluding cable