Submersible Sewage Pumps BZ Series

Tsurumi BZ series pumps are heavy-duty, submersible sewage and wastewater pumps that are designed with a shrouded single/two-channel impeller and wide passages of over 3
inches (76.2 mm) in diameter to minimize trouble due to clogged solids. In addition, as mid to large sized pumps with 22 – 75 kW of drive power, they raise the already high pump efficiency standard of predecessor sewage and wastewater pumps of the Tsurumi brand with even better energy efficiency.

The BZ series offers a wide line up of discharge bores ranging from 80 – 350 mm and motor outputs of 1.5 – 75 kW. Moreover, the pumps can be used with Tsurumi’s guide rail fitting device that facilitates installation and maintenance. The BZ series pumps come packed with a number of original technologies developed and honed over years of service including an anti-wicking cable, motor protector, dual inside mechanical seals with silicon carbide faces and Oil Lifter.

SUBMERSIBLE SEWAGE PUMPS BZ SERIES

Highly reliable and durable, Tsurumi BZ-series pumps are designed and built for sound quality and continuous duty that can help you keep your 
systems — whether for wastewater drainage, pumping or flood control — running stably and greatly reduce your maintenance costs. As an option, 
the pumps can be adapted for seawater, high temperature liquids or other special application, paving the way for their use at shipyardsand power 
plants for water intake and discharge.

Performance Range

Selection Table

★ : Single/Three-phase model can be selected in the same motor output.
☆ : Single-phase model only.
 ● : High head type model only.

Model Number Designation

Motor Output (kW) 1.5 2.2 3.7 5.5 7.5 11 15 22 30 37 45 55 75
3" 80mm                          
4" 100mm                        
8" 200mm                          
10" 250mm              
12" 300mm              
14" 350mm              

Guide Rail Fitting System

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.
The TOS/TO is the guide rail fitting system made of cast iron and is compatible with cast iron pumps.

Accessories
• Duckfoot Bend
• Guide Support
• Guide Hook
• Lifting Chain 5m
• JIS 10kg/cm 2 Flange
(TOS set only, excluding TOS200B422)

Float Switches

Tsurumi offers two types of float switches (liquid level sensors). A micro-switch is incorporated in both types.

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.

Options

Seawater-Resistant Version

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.

High Temperature Liquids Version

Tsurumi’s submersible pumps are applicable to high temperature liquids of up to 80°C. Pumps of the standard specification can discharge liquids of up to 40°C. However, there are many fields that need to discharge higher temperature liquids, e.g., discharging industrial water from a power plant or ironworks, or discharging hot spring water from a mine in a volcanic zone.

Special Material Version

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, high-chromium cast iron and bronze to suit your specific requirements.

Dry Pit Version

The dry pit pumps can be installed indoors and outside of tanks, and still deliver the performance of conventional submersible pumps. Daily inspection and maintenance are easy, because the pump body is installed outside of tanks. These pumps have been developed with Tsurumi-original specifications, aiming for stable operation and reduction in maintenance labor.

Design Model 300BZ475

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.Air Release Valve
Fitted on the water jacket or the pump casing to prevent the air lock. When air flows through the valve, the ball stays at the bottom, but when the pumped water starts to flow, the ball closes the outlet because of its buoyancy.

3.Motor Protector
Circle Thermal Protector (7.5kW and below)
Directly cuts the motor circuit if excessive heat builds up or overcurrent occurs in the motor.
Miniature Thermal Protectors (11kW and above)
React to excessive heat caused by dry-running. The bimetal strip opens to cause the control panel to shut the power supply.

4.Water Jacket (150B475 only)
The pump is equipped with a water jacket, around the motor frame. A portion of the pumped liquid is allowed to flow into the water jacket to cool the motor. This design feature permits the unit to operate at low water levels for extended periods of time.

5.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. Rubber parts of the upper and lower fixing rings are made of NBR or FPM (FKM), which provides higher resistance to heat and chemical

6.Oil Lifter
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.

7.Leakage Sensor (22kW 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.

8.Seal Pressure Relief Port (22kW and above)
Protects the mechanical seal from pump pressure. It also protects the seal face by discharging wear particles.

9.Back Pull-out Design (3.7kW and below, and 15kW and above)
Enables the motor to be separated from the pump unit with the impeller attached, by removing the bolts between the oil casing and the pump casing. This design facilitates maintenance and inspection of the principal parts of the pump.

Shrouded Channel Impeller
with Wide Passages to Prevent Clogging

  – Over 3 Inches Passage –

     BZ-series pumps come with wide passages of over 3 inches (76.2mm) in diameter — the largest being 90mm across — to minimize trouble due to clogged solids and fibrous matter. They adopt a shrouded single/two-channel impeller.

BZ -Channel Impeller-

The BZ-series is a submersible sewage and wastewater pumps that is designed with a shrouded single/two-channel impeller and wide passages of over 3 inches (76.2 mm) in diameter to minimize trouble due to clogged solids. In addition, as mid to large sized pumps with 22 – 75 kW of drive power, they raise the already high pump efficiency standard of predecessor sewage and wastewater pumps of the Tsurumi brand with even better energy efficiency.

Dimensions

Performance Curves

Discharge Bore: 80 • 100 • 200mm

Discharge
Bore

mm
Model Motor
Output
kW
Phase Starting
Method
Solids
Passage

mm
Dimensions L x W x H 50/60Hz
mm
Dry Weight*2
kg
Cable
Length

m
Free
Standing
Guide Rail
Fitting
Free
Standing
Guide Rail
Fitting
Free
Standing
Guide Rail
Fitting
80 80BZ41.5 TOS80BZ41.5 1.5 Three D.O.L. 80 523 x 273 x 631 697 x 273 x 646 78 74 6
100 100BZ42.2 TOS100BZ42.2 2.2 D.O.L. 80 551 x 273 x 631 709 x 273 x 646 80 74 6
100BZ43.7 TOS100BZ43.7 3.7 D.O.L. 80 585 x 289 x 681 743 x 289 x 696 100 94 6
100BZ45.5 TOS100BZ45.5 5.5 D.O.L. 80 716 x 421 x 924 935 x 406 x 914 168 161 8
100BZ47.5 TOS100BZ47.5 7.5 D.O.L. 80 716 x 421 x 945 935 x 406 x 935 179 172 8
100BZ411 TOS100BZ411 11 Star-Delta 80 727 x 431 x 1023 946 x 428 x 1016 214 207 8
100BZ411H
(50Hz)
TOS100BZ411H
(50Hz)
11 Star-Delta 80 727 x 431 x 1023 946 x 428 x 1016 214 207 8
100BZ415 TOS100BZ415 15 Star-Delta 80 845 x 526 x 1160/
770 x 444 x 1093
1044 x 494 x1074/
989 x 444 x 1081
308 293 8
200 200BZ622 TQ200BZ622 22 Star-Delta 76.2 1208 x 760 x 1584 1459 x 660 x 1494 760 710 10
200BZ430 TO200BZ430 30 Star-Delta 76.2 1208 x 760 x 1504 1459 x 660 x 1409 780 730 10
200BZ437 TQ200BZ437 37 Star-Delta 76.2 1208 x 760 x 1577 1459 x 660 x 1482 830 780 10
200BZ445 TO200BZ445 45 Star-Delta 76.2 1208 x 760 x 1584 1459 x 660 x 1494 840 790 10
200BZ455 TO200BZ455 55 Star-Delta 76.2 1208 x 760 x 1736 1461 x 660 x 1646 1340 1290 10
200BZ475 T0200BZ475 75 Star-Delta 76.2 1208 x 760 x 1736 1461 x 660 x 1646 1340 1290 10

* 1 Refer to page 11 for dimension symbol positions.
* 2 All weights excluding cable

      Weights of guide rail fitting excluding duckfoot bend

Performance Curves

Discharge Bore: 250mm

Discharge
Bore

mm
Model Motor
Output
kW
Phase Starting
Method
Solids
Passage
50/60Hz
mm
Dimensions L x W x H*1
mm
Dry Weight*2
kg
Cable
Length

m
Free
Standing
Guide Rail
Fitting
Free
Standing
Guide Rail
Fitting
Free
Standing
Guide Rail
Fitting
250 250BZ622 TO250BZ622 22 Three Star-Delta 90/80 1235 x 724 x 1650 1486 x 616 x 1514 810 760 10
250BZ430 TO250BZ430 30 Star-Delta 80/79 1235 x 724 x 1570 1486 x 616 x 1434 830 780 10
250BZ437 TO250BZ437 37 Star-Delta 80/79 1235 x 724 x 1643 1486 x 616 x 1507 880 830 10
250BZ445 TO250BZ445 45 Star-Delta 80/79 1235 x 724 x 1650 1486 x 616 x 1514 890 840 10
250BZ455 TO250BZ455 55 Star-Delta 90/80 1235 x 724 x 1802 1519 x 636 x 1666 1390 1290 10
250BZ475 TO250BZ475 75 Star-Delta 90/80 1235 x 724 x 1802 1519 x 636 x 1666 1390 1290 10
250
-High Head
250BZ622H TO250BZ622H 22 Star-Delta 76.2 1313 x 760 x 1584 1577 x 660 x 1467 760 710 10
250BZ430H TO250BZ430H 30 Star-Delta 76.2 1313 x 760 x 1504 1577 x 660 x 1387 780 730 10
250BZ437H TO250BZ437H 37 Star-Delta 76.2 1313 x 760 x 1577 1577 x 660 x 1460 830 780 10
250BZ445H TO250BZ445H 45 Star-Delta 76.2 1313 x 760 x 1584 1577 x 660 x 1467 840 790 10
250BZ455H TO250BZ455H 55 Star-Delta 76.2 1313 x 760 x 1736 1579 x 660 x 1619 1340 1290 10
250BZ475H TO250BZ475H 75 Star-Delta 76.2 1313 x 760 x 1736 1579 x 660 x 1619 1340 1290 10

* 1 Refer to page 11 for dimension symbol positions.
* 2 All weights excluding cable

      Weights of guide rail fitting excluding duckfoot bend

Performance Curves

Discharge Bore: 300mm

Discharge
Bore

mm
Model Motor
Output
kW
Phase Starting
Method
Solids
Passage
50/60Hz
mm
Dimensions L x W x H*1
mm
Dry Weight*2
kg
Cable
Length

m
Free
Standing
Guide Rail
Fitting
Free
Standing
Guide Rail
Fitting
Free
Standing
Guide Rail
Fitting
300 300BZ622 TO300BZ622 22 Three Star-Delta 90 1386 x 800 x 1677 1674 x 658 x 1550 910 810 10
300BZ630 TO300BZ630 30 Star-Delta 90 1386 x 800 x 1677 1674 x 658 x 1550 950 800 10
300BZ637 TO300BZ637 37 Star-Delta 90 1386 x 800 x 1677 1674 x 658 x 1550 940 840 10
300BZ645 TO300BZ645 45 Star-Delta 90 1386 x 800 x 1845 1691 x 680 x 1718 1210 1110 10
300BZ655 TO300BZ655 55 Star-Delta 90 1386 x 800 x 1845 1691 x 680 x 1718 1210 1110 10
300BZ475 TO300BZ475 75 Star-Delta 90 1386 x 800 x 1829 1674 x 680 x 1702 1240 1140 10
300
-High Head
300BZ622H TO300BZ622H 22 Star-Delta 90/80 1288 x 724 x 1650 1580 x 616 x 1537 810 760 10
300BZ430H TO300BZ430H 30 Star-Delta 80/79 1288 x 724 x 1570 1580 x 616 x 1457 830 780 10
300BZ437H TO300BZ437H 37 Star-Delta 80/79 1288 x 724 x 1643 1580 x 616 x 1530 880 830 10
300BZ445H TO300BZ445H 45 Star-Delta 80/79 1288 x 724 x 1650 1580 x 616 x 1537 890 840 10
300BZ455H TO300BZ455H 55 Star-Delta 90/80 1288 x 724 x 1802 1613 x 616 x 1689 1390 1290 10
300BZ475H TO300BZ475H 75 Star-Delta 90/80 1288 x 724 x 1802 1613 x 616 x 1689 1390 1290 10

* 1 Refer to page 11 for dimension symbol positions.
* 2 All weights excluding cable

      Weights of guide rail fitting excluding duckfoot bend

Performance Curves

Discharge Bore: 350mm

Discharge
Bore

mm
Model Motor
Output
kW
Phase Starting
Method
Solids
Passage
50/60Hz
mm
Dimensions L x W x H
mm
Dry Weight*
kg
Cable
Length

m
Free
Standing
Guide Rail
Fitting
Free
Standing
Guide Rail
Fitting
Free
Standing
Guide Rail
Fitting
350
-High Head-
350BZ622H TO350BZ622H 22 Three Star-Delta 90 1508 x 800 x 1677 1749 x 658 x 1595 910 810 10
350BZ630H TO350BZ630H 30 Star-Delta 90 1508 x 800 x 1677 1749 x 658 x 1595 950 800 10
350BZ637H TO350BZ637H 37 Star-Delta 90 1508 x 800 x 1677 1749 x 658 x 1595 940 840 10
350BZ645H TO350BZ645H 45 Star-Delta 90 1508 x 800 x 1845 1749 x 680 x 1763 1210 1110 10
350BZ655H TO350BZ655H 55 Star-Delta 90 1508 x 800 x 1845 1749 x 680 x 1763 1210 1110 10
350BZ475H TO350BZ475H 75 Star-Delta 90 1508 x 800 x 1829 1749 x 680 x 1747 1240 1140 10

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

Specifications

#1 BZ
80BZ41.5 100BZ42.2 100BZ43.7 100BZ45.5 100BZ47.5 100BZ411 1008741H
(50Hz)
100BZ415
PUMP Discharge Bore mm 80 100
Discharge Connection Threaded JIS 10kg/cm 2  Flange
Solids Passage 5060Hz mm 80
Impeller Shrouded Single-channel
Radial Gap Axial Gap
Gray Cast Iron
Suction Cover - Gray Cast Iron
Oil Seal Nitrile Butadiene Rubber -
Casing Gray Cast Iron
Shaft Seal Dual Inside Mechanical Seals (with Oil Lifter)
Silicon Carbide
Shaft Sleeve -
MOTOR Type Continuous-duty Rated, Dry-type Induction Motor
Output kW 1.5 2.2 3.7 5.5 7.5 11 15
Phase Three
Pole 4
Speed (S.S.)  min -1
50/60Hz
1500/1800 1500/- 1500/1800
Insulation E F
Starting Method D.O.L. Star-Delta
Motor Protector
(built-in)
CTP MTP
Leakage Sensor
(built-in)
-
Lubricant ml 1300 4200 4800 6500 5500
Turbine Oil (ISO VG32)
Frame Gray Cast Iron
Outor Cover -
Shaft 420 Stainless Steel
Power Cable m P6 8
PVC Chloroprene Rubber
Dry Weight* Free Standing   kg 78 80 100 168 179 214 308
Guide Rail Fitting     kg 74 94 161 172 207 293

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

Specifications

#2 BZ
200BZ622
250BZ622H
200BZ430
250BZ430H
200BZ437
250BZ437H
200BZ445
250BZ445H
200BZ455
250BZ455H
200BZ475
250BZ475H
PUMP Discharge Bore mm 200
250
Discharge Connection JIS 10kg/cm 2  Flange
Solids Passage 5060Hz mm 76.2
Impeller Shrouded Two-channel
Radial Gap
Gray Cast Iron
Suction Cover Gray Cast Iron
Oil Seal Nitrile Butadiene Rubber
Casing Gray Cast Iron
Shaft Seal Dual Inside Mechanical Seals (with Oil Lifter)
Silicon Carbide
Shaft Sleeve 304 Stainless Steel 403 Stainless Steel
MOTOR Type Continuous-duty Rated, Dry-type Induction Motor
Output kW 22 30 37 45 55 75
Phase Three
Pole 6 4
Speed (S.S.)  min -1
50/60Hz
1000/1200 1500/1800
Insulation F
Starting Method Star-Delta
Motor Protector
(built-in)
MTP
Leakage Sensor
(built-in)
Electrode
Lubricant ml 9500 9400
Turbine Oil (ISO VG32)
Frame Gray Cast Iron
Outor Cover - Rolled Steel
Shaft 420 Stainless Steel
Power Cable m 10
Chloroprene Rubber
Dry Weight* Free Standing   kg 760 780 830 840 1340
Guide Rail Fitting     kg 710 730 780 790 1290

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

Specifications

#3 BZ
250BZ622
300BZ622H
250BZ430
300BZ430H
250BZ437
300BZ437H
250BZ445
300BZ445H
250BZ455
300BZ455H
H
250BZ475
300BZ475H
300BZ622
350BZ622H
300BZ630
350BZ630H
H
300BZ637
350BZ637H
300BZ645
350BZ645H
300BZ655
350BZ655H
300BZ475
350BZ475H
PUMP Discharge Bore mm 250
300
300
350
Discharge Connection JIS 10kg/cm 2  Flange
Solids Passage 5060Hz mm 90/80 80/79 90/80 90
Impeller Shrouded Two-channel
Radial Gap
Gray Cast Iron
Suction Cover Gray Cast Iron
Oil Seal Nitrile Butadiene Rubber
Casing Gray Cast Iron
Shaft Seal Dual Inside Mechanical Seals (with Oil Lifter)
Silicon Carbide
Shaft Sleeve 304 Stainless Steel 403 Stainless Steel 304 Stainless Steel 403 Stainless Steel
MOTOR Type Continuous-duty Rated, Dry-type Induction Motor
Output kW 22 30 37 45 55 75 22 30 37 45 55 75
Phase Three
Pole 6 4 6 4
Speed (S.S.)  min -1
50/60Hz
1000/1200 1500/1800 1000/1200 1500/1800
Insulation F
Starting Method Star-Delta
Motor Protector
(built-in)
MTP
Leakage Sensor
(built-in)
Electrode
Lubricant ml 9500 9400 9500 11000 13000 9400
Turbine Oil (ISO VG32)
Frame Gray Cast Iron
Outor Cover - Rolled Steel - Rolled Steel
Shaft 420 Stainless Steel
Power Cable m 10
Chloroprene Rubber
Dry Weight* Free Standing     kg 810 830 880 890 190 910 950 940 1210 1240
Guide Rail Fitting       kg 760 780 830 840 1290 810 800 840 1110 1140

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