Submersible Sewage Pumps U Series

Tsurumi U Series pumps are a part of the submersible sewage pumps vortex impeller series. These pumps feature a vortex impeller that is recessed in the pump casing interior, which allows them to handle sewage with large solids without clogging or winding.

Thanks to their unique design, the Tsurumi U Series pumps are ideal for applications that require the pumping of sewage or wastewater containing large solid materials. Their ability to handle such materials without clogging or winding makes them a reliable choice for a wide range of sewage and wastewater management applications.

In addition to their robust performance, the Tsurumi U Series pumps are also designed for ease of use and maintenance. Their simple yet efficient design allows for quick and easy access to the impeller and other key components, making maintenance and repair work much more straightforward.

SUBMERSIBLE SEWAGE PUMPS DESIGN U SERIES

GUIDE RAIL FITTING SYSTEM U SERIES

The guide rail fitting system connects the pump to and from the piping easily just by lowering and hoisting the pump, allowing easy maintenance and inspection without the need to enter the sump.
Pump models used in combination with the guide rail fitting system can be identified by the prefix “TOS”, “TS” and “TOK”. Refer to standard specifications for availability and model numbers.

TOS
The TOS is the standard guide rail fitting system made of cast-iron and is compatible with cast-iron pumps. Pumps having discharge bore from 50mm to 100mm are available for the TOS.

TOK
Made of high-quality resin, the TOK is designed for light-weight, small pumps. Rubber bellow attached to the guide hook are inverted to the duckfoot bend when the pump starts operating. This eliminates leakage at the seal even if a light-weight pump is used in combination with the TOK.

AUTOMATIC MODEL

The automatic model has an integral control circuit and two float switches that operate at a low voltage. It operates automatically in response to the change in water levels. As it has a Circle Thermal Protector (CTP) integrated into the motor to protect the motor from overload or overheating, it is not required to provide an extra motor protection circuit in the starter panel.

This model can be identified by the suffix “A”. Refer to the standard specifications for availability and model numbers.

AUTO-ALTERNATION MODEL

The auto-alternation model is used along with an automatic model. The combinational use of these two pumps enables each pump to operate alternately without control panel.

The auto-alternation model has three floats and can be identified by the suffix “W”. Refer to standard specifications for availability and model numbers. It is available in the same output range of the automatic pumps.

How the Auto-alternation Model Works

– Operation is enabled by merely connecting the power supply.

Primary Operation

1. Float 3 operates, and pump W starts to discharge water.

2. Water is discharged (water level falls).

3. Stop float 2 of pump W operates to end water discharge. At this time, alternation start float 3 of pump W rests for one discharge operation.

Secondary Operation

1. Start float 4 of pump A operates to start water discharge.

2. Water is discharged (water level falls).

3. Stop float 1 of pump A operates to end water discharge. At the same time, start float 3 of pump W becomes ready for operation.

PERFORMANCE CURVES & DIMENSIONS

U Series Discharge Bore: 40 • 50mm

MODEL SELECTION

U Series Discharge Bore: 40 • 50mm

Curve No.	Discharge Bore mm	Standard Model		Automatic Model		Auto-Alternation Model
Curve No.	Discharge Bore mm	Free Standing	Guide Rail Fitting	Free Standing	Guide Rail Fitting	Free Standing	Guide Rail Fitting
1	40	40U2.25S	(TOK)	40UA2.25S	(TOK)	40UW2.25S	(TOK)
1	40	40U2.25	(TOK)	40UA2.25	(TOK)	40UW2.25	(TOK)
2	50	50U2.4S	(TOK)	50UA2.4S	(TOK)	50UW2.4S	(TOK)
2	50	50U2.4	(TOK)	50UA2.4	(TOK)	50UW2.4	(TOK)
3	50	50U2.75	(TOK)	50UA2.75	(TOK)	50UW2.75	(TOK)
4	50	50U21.5	TOS50U21.5	50UA21.5	TOS50UA21.5	50UW21.5	TOS50UW21.5

* All weights excluding cable
Weights of guide rail fitting model excluding duckfoot bend

Motor Output kW	Phase	Speed (S.S.) 50Hz/60Hz min ^-1	Starting Method	Solids Passage mm	Cable Length m	Cable Code	Dimensions L×H mm				Dry Weight * kg
							Standard Model		Auto＆Auto-Alternation Model		Standard Model		Auto＆Auto-Alternation Model
							Free Standing	Guide Rail Fitting	Free Standing	Guide Rail Fitting	Free Standing	Guide Rail Fitting	Free Standing	Guide Rail Fitting
0.25	Single	3000/3600	Split-phase	35	5	a	241×383	-	241×433	-	14	-	15.5	-
0.25	Three	3000/3600	D.O.L.	35	6	A	241×383	-	241×433	-	13.5	-	15	-
0.4	Single	3000/3600	Capacitor	35	5	a	236×433	-	236×450	-	20	-	21	-
0.4	Three	3000/3600	D.O.L.	35	6	A	236×400	-	236×450	-	19.2	-	21	-
0.75	Three	3000/3600	D.O.L.	35	6	A	249×395	-	310×476	-	23	-	24	-
1.5	Three	3000/3600	D.O.L.	35	6	A	297×466	658×478	347×560	708×572	30	35	31	36

* All weights excluding cable
Weights of guide rail fitting model excluding duckfoot bend

PERFORMANCE CURVES & DIMENSIONS

U Series Discharge Bore: 80mm

MODEL SELECTION

U Series Discharge Bore: 80mm

Curve No.	Discharge Bore mm	Standard Model		Automatic Model		Auto-Alternation Model
Curve No.	Discharge Bore mm	Free Standing	Guide Rail Fitting	Free Standing	Guide Rail Fitting	Free Standing	Guide Rail Fitting
1	80	80U2.75	TOS80U2.75	80UA2.75	TOS80UA2.75	80UW2.75	TOS80UW2.75
2	80	80U21.5	TOS80U21.5	80UA21.5	TOS80UA21.5	80UW21.5	TOS80UW21.5
3	80	80U22.2	TOS80U22.2	80UA22.2	TOS80UA22.2	80UW22.2	TOS80UW22.2
4	80	80U23.7	TOS80U23.7	80UA23.7	TOS80UA23.7	80UW23.7	TOS80UW23.7

^{* 1} 200~240V
^{* 2} All weights excluding cable
Weights of guide rail fitting model excluding duckfoot bend

Motor Output kW	Phase	Speed (S.S.) 50Hz/60Hz min ^-1	Starting Method	Solids Passage mm	Cable Length m	Cable Code	Dimensions L×H mm				Dry Weight *² kg
							Standard Model		Auto＆Auto-Alternation Model		Standard Model		Auto＆Auto-Alternation Model
							Free Standing	GuideRail Fitting	Free Standing	Guide Rail Fitting	Free Standing	Guide Rail Fitting	Free Standing	Guide Rail Fitting
0.75	Three	3000/3600	D.O.L.	46	6	A	383×421	605×531	444×502	666×612	29	24	30	26
1.5	Three	3000/3600	D.O.L.	46	6	A	420×499	642×609	469×593	691×703	40	36	41	37
2.2	Three	3000/3600	D.O.L.	56	6	A(B*1)	502×562	641×647	502×656	641×741	55	51	63	59
3.7	Three	3000/3600	D.O.L.	56	6	B(C*1)	502×565	641×650	502×629	641×714	62	58	73	69

^{* 1} 200~240V
^{* 2} All weights excluding cable
Weights of guide rail fitting model excluding duckfoot bend

CABTYRE CABLE CODE REFERENCE

Single-Phase

Code	No. of Cables	Cores × mm²	Outer Dia. mm	Material
a	1	3×1.25	10.1	PVC

Three-Phase

Code	No. of Cables	Cores × mm²	Outer Dia. mm	Material
A	1	4×1.25	11.1	PVC
B	1	4×2.0	11.8
C	1	4×3.5	13.9

Code	No. of Cables	Cores × mm ²	Outer Dia. mm	Material
D	1	4×3.5	14.1	Chloroprene Rubber
E	1	4×5.5	16.8	Chloroprene Rubber
F	3	4×3.5	14.1	Chloroprene Rubber
		3×3.5	12.9	Chloroprene Rubber
		2×1.25	9.6	PVC

TSURUMI OPTIONS

SPECIAL VERSION WITH GALVANIC CORROSION PROTECTION
In seawater, a material’s resistance to corrosion can be seen clearly. When metals with different potentials are brought into contact in seawater, only the metal of lower potential corrodes. As the difference in potential increases, the metal of lower potential corrodes faster. As an option, Tsurumi can supply pumps with parts made of higher electric potential metal as the sacrificial anode.
SPECIAL VERSION FOR HIGHER TEMPERATURE LIQUID
Standard pumps are designed for continuous running at the maximum ambient temperature of 40°C. In addition to these, Tsurumi can provide pumps for operation at higher liquid temperatures upon request. Refitting for operation at higher temperatures involves modification of not only the insulation of motor windings but also several components. Two high-temperature operating models are available – the Rank 60 for operation in liquids up to 60°C and the Rank 90 for operation in liquids up to 90°C. Consult your dealer for more details. (These special versions are not available for some pump models.)
DRY PIT VERSION
The advantage of dry pit model is that it will not be damaged by flooding, as it is constructed with a submersible pump. Tsurumi can provide the dry pit model as option for the whole range of U/UZ-series pumps. The water jacket covers whole part of the motor. It efficiently cools the motor for continuous operations.
SPECIAL VERSION WITH NON-STANDARD MATERIALS
Tsurumi can also provide you with pumps with essential components such as the impeller, pump casing and the suction cover made of non-standard materials. Select from stainless steel, chromium iron and bronze to suit your specific requirements. Consult your dealer for more details.

SPECIAL ACCESSORIES

Model MC-2 is a heavy-duty type float switch with a shock absorber.
Having equipped with a high grade micro switch, the MC-2 assures trouble-free operation in the liquid containing much suspended solids and floating scum. Either of the two contacts, normally-open or normally-close, can be selected as required.

Model RF-5 is an economy type float which can detect upper/lower limit water levels with single float. The snap on-off action ensures stable operation in clean or waste water containing suspended solids or oil and fat.