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.

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	●					●	●	●
		Flow-Thru	●					●	●	●
		Side Flow					●
		Side Flow					●
	Side Discharge			●	●	●
	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

Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut elit tellus, luctus nec ullamcorper mattis, pulvinar dapibus leo.

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
	Impeller	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)
	Shaft Seal	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
	ml Lubricant	Turbine Oil (ISO VG32)
	Shaft	403 Stainless Steel
	m Cable	5		10	5
	m Cable	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
	Impeller	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
	Shaft 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
	ml Lubricant	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
	m Cable	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