SUBMERSIBLE SEWAGE PUMPS B/BZseries OVER 3 INCHES PASSAGE

B-series

Basic and heavy-duty submersible sewage and wastewater pumps with excellent foreign matter passing capability and reliability, and have been used in a variety of applications.

BZ-series

Heavy-duty submersible sewage and wastewater pumps with wide passages of over 3 inches (76.2 mm), especially high pumping efficiency in the 22 - 75 kW range.

  • B-series
  • BZ-series - Over 3 Inches Passage -
Tsurumi B-series pumps are basic heavy-duty, submersible sewage and wastewater pumps providing excellent foreign matter passing capability with reliable operation. The B-series pumps have accumulated various track record and know-how in a wide range of industrial and water treatment applications for many years. Using a channel impeller, they are designed to minimize trouble due to clogged solids and fibrous matter in pumped fluids.

The B-series offers a wide lineup of discharge bores ranging from 50 - 300 mm and motor outputs of 0.4 - 75 kW, and comes in a variety of models including high head type and single-phase BP models that can handle high volume pumping demand. Particularly, the high head type pumps can satisfy the needs of the building equipment market that is oriented to saving energy and conserving water, and fit other high head market applications.
Moreover, the pumps can be used with Tsurumi’s guide rail fitting device that facilitates installation and maintenance (except for BP models).

Tsurumi pumps come packed with a number of original technologies we have developed and honed over years of research, including an anti-wicking cable, motor protector, dual inside mechanical seals with silicon carbide faces and Oil Lifter. Highly reliable and durable, Tsurumi pumps are designed and built for sound quality and prolonged continuous operation.

The B-series pumps can help you keep your systems . whether for wastewater drainage, water treatment, flood control, irrigation and recreation facilities . running stably and greatly reduce your maintenance costs.
Additionally, the pumps can be specially configured with discharge bores of 400 mm and greater, or as an option, adapted for dry pit applications where they can be installed indoors and outside a tank, as well as for seawater or high temperature liquids, paving the way for their use at shipyards and power plants for water intake and discharge.

Selection Table

Motor Output (kW) 0.4 0.75 1.5 2.2 3.7 5.5 7.5 11 15 18.5 22 37 75
2” 50mm
3” 80mm
4” 100mm
6” 150mm  
8” 200mm  
10” 250mm  
12” 300mm  

★: Single/Three-phase model can be selected in the same motor output.

☆: Single-phase model only.

●: High head type model only.

Structure

The impeller employed by B-series pumps is itself configured like a channel to make it less likely for solids and fibrous matter to clog inside the pumps. Depending on the pumping capacity, the pump is outfitted with a semi-open or shrouded impeller, and either 1 or 2 vanes. Equipping your pump with the right impeller minimizes trouble caused by clogged solids.

  • Semi-open,Single-channel
  • Semi-open,Two-channel
  • Semi-open,Two-channel (High Head)
  • Shrouded,Two-channel
  • 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 chemicals.

  • 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

    (18.5kW and above, excluding 150B422 and 200B422)

    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. Single/Triple Oil Seals *excluding some models

    Labyrinth Ring (150B475 only)

    Used as a “Dust Seal”, single or triple oil seals protect the mechanical seal from abrasive particles. The labyrinth ring is equipped to provide a better countermeasure against wear caused by high pressure generated in the casing and improve the maintainability.

  • 9. Seal Pressure Relief Port

    (11kW and above of 80 & 100mm bore, 22kW and above of 150mm bore, and 200B422)

    Protect the mechanical seal from pump pressure. It also protects the seal face by discharging wear particles.

  • 10. Mouth Ring & Wear Ring

    (150B437 and 150B475 only)

    Prevent wear in the pump casing and suction cover, resulting in reduced maintenance costs.

Performance Curves

Model Selection

Discharge
Bore
(mm)
Model Motor
Output
(kW)
Phase Starting
Method
Free
Standing
Guide Rail
Fitting
50 50B2.4S TOS50B2.4S 0.4 Single Capacitor Start
50B2.4 TOS50B2.4 0.4 Three D.O.L.
50B2.75S TOS50B2.75S 0.75 Single Capacitor Start
50B2.75H TOS50B2.75H 0.75 Three D.O.L.
50B2.75 TOS50B2.75 0.75 Three D.O.L.
80 80BP2.4S (50Hz) - 0.4 Single Capacitor Run
80BP2.75S (50Hz) - 0.75 Single Capacitor Run
80B21.5 TOS80B21.5 1.5 Three D.O.L.
80
-High Head-
80B411 TOS80B411 11 Three Star-Delta
80B415 TOS80B415 15 Three Star-Delta
80B418.5 TOS80B418.5 18.5 Three Star-Delta
80B422 TOS80B422 22 Three Star-Delta
100 100B42.2 TOS100B42.2 2.2 Three D.O.L.
100B43.7 TOS100B43.7 3.7 Three D.O.L.*1
100B43.7H TOS100B43.7H 3.7 Three D.O.L.*1
100B45.5 TOS100B45.5 5.5 Three D.O.L.*1
100B47.5 TOS100B47.5 7.5 Three D.O.L.*1
100
-High Head-
100B411 TOS100B411 11 Three Star-Delta
100B415 TOS100B415 15 Three Star-Delta
100B418.5 TOS100B418.5 18.5 Three Star-Delta
100B422 TOS100B422 22 Three Star-Delta

*1 Star-Delta available upon request

Performance Curves

Model Selection

Discharge
Bore
(mm)
Model Motor
Output
(kW)
Phase Starting
Method
Free
Standing
Guide Rail
Fitting
150 150B43.7 TOS150B43.7 3.7 Three D.O.L.
150B63.7 TOS150B63.7 3.7 Three D.O.L.*1
150B47.5H TOS150B47.5H 7.5 Three D.O.L.*1
150B47.5L TOS150B47.5L 7.5 Three D.O.L.*1
150B411 TOS150B411 11 Three Star-Delta
150B415 TOS150B415 15 Three Star-Delta
150B422 TOS150B422 22 Three Star-Delta
150B437 TO150B437 37 Three Star-Delta
150B475 TO150B475 75 Three Star-Delta
200 200B47.5 TO200B47.5 7.5 Three D.O.L.*1
200B411 TO200B411 11 Three Star-Delta
200B415 TO200B415 15 Three Star-Delta
200B422 TOS200B422 22 Three Star-Delta
250 250B611 TO250B611 11 Three Star-Delta
250B415 TO250B415 15 Three Star-Delta
300 300B615 TO300B615 15 Three Star-Delta

*1 Star-Delta available upon request

B-series (350 - 800 mm)

Extra-large discharge bores of 350 mm or greater B-series (350 - 800 mm)

As an option, the B-series pumps can be specially configured with discharge bores of 350 mm and greater, or adapted for dry pit, seawater, high temperature liquids and other special applications. Let Tsurumi know what you need.

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 lineup 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.

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 shipyards and power plants for water intake and discharge.

Selection Table

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

★: High head type model can be selected in the same motor output.

☆: High head type model only.

Structure

- 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.

Shrouded Channel Impeller
MAX.90mm
  • 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

    (55kW and above of 200 & 250mm bore, and 45kW and above of 300 & 350mm bore)

    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 chemicals.

  • 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. Oil Seal

    Used as a "Dust Seal," it protects the mechanical seal from abrasive particles.

  • 9. Seal Pressure Relief Port (22kW and above)

    Protect the mechanical seal from pump pressure. It also protects the seal face by discharging wear particles.

  • 10. 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.

Performance Curves

Model Selection

Discharge
Bore
(mm)
Model Motor
Output
(kW)
Phase Starting
Method
Solids
Passage
(mm)
Free
Standing
Guide Rail
Fitting
80 80BZ41.5 TOS80BZ41.5 1.5 Three D.O.L. 80
100 100BZ42.2 TOS100BZ42.2 2.2 Three D.O.L. 80
100BZ43.7 TOS100BZ43.7 3.7 Three D.O.L. 80
100BZ45.5 TOS100BZ45.5 5.5 Three D.O.L. 80
100BZ47.5 TOS100BZ47.5 7.5 Three D.O.L. 80
100BZ411 TOS100BZ411 11 Three Star-Delta 80
100BZ411H (50Hz) TOS100BZ411H (50Hz) 11 Three Star-Delta 80
100BZ415 TOS100BZ415 15 Three Star-Delta 80

Performance Curves

Model Selection

Discharge
Bore
(mm)
Model Motor
Output
(kW)
Phase Starting
Method
Solids
Passage
(mm)
Free
Standing
Guide Rail
Fitting
200 200BZ622 TO200BZ622 22 Three Star-Delta 76.2
200BZ430 TO200BZ430 30 Three Star-Delta 76.2
200BZ437 TO200BZ437 37 Three Star-Delta 76.2
200BZ445 TO200BZ445 45 Three Star-Delta 76.2
200BZ455 TO200BZ455 55 Three Star-Delta 76.2
200BZ475 TO200BZ475 75 Three Star-Delta 76.2
250 250BZ622 TO250BZ622 22 Three Star-Delta 90 / 80
250BZ430 TO250BZ430 30 Three Star-Delta 80 / 79
250BZ437 TO250BZ437 37 Three Star-Delta 80 / 79
250BZ445 TO250BZ445 45 Three Star-Delta 80 / 79
250BZ455 TO250BZ455 55 Three Star-Delta 90 / 80
250BZ475 TO250BZ475 75 Three Star-Delta 90 / 80
250
-High Head-
250BZ622H TO250BZ622H 22 Three Star-Delta 76.2
250BZ430H TO250BZ430H 30 Three Star-Delta 76.2
250BZ437H TO250BZ437H 37 Three Star-Delta 76.2
250BZ445H TO250BZ445H 45 Three Star-Delta 76.2
250BZ455H TO250BZ455H 55 Three Star-Delta 76.2
250BZ475H TO250BZ475H 75 Three Star-Delta 76.2

Performance Curves

Model Selection

Discharge
Bore
(mm)
Model Motor
Output
(kW)
Phase Starting
Method
Solids
Passage
(mm)
Free
Standing
Guide Rail
Fitting
300 300BZ622 TO300BZ622 22 Three Star-Delta 90
300BZ630 TO300BZ630 30 Three Star-Delta 90
300BZ637 TO300BZ637 37 Three Star-Delta 90
300BZ645 TO300BZ645 45 Three Star-Delta 90
300BZ655 TO300BZ655 55 Three Star-Delta 90
300BZ475 TO300BZ475 75 Three Star-Delta 90
300
-High Head-
300BZ622H TO300BZ622H 22 Three Star-Delta 90 / 80
300BZ430H TO300BZ430H 30 Three Star-Delta 80 / 79
300BZ437H TO300BZ437H 37 Three Star-Delta 80 / 79
300BZ445H TO300BZ445H 45 Three Star-Delta 80 / 79
300BZ455H TO300BZ455H 55 Three Star-Delta 90 / 80
300BZ475H TO300BZ475H 75 Three Star-Delta 90 / 80
350
-High Head-
350BZ622H TO350BZ622H 22 Three Star-Delta 90
350BZ630H TO350BZ630H 30 Three Star-Delta 90
350BZ637H TO350BZ637H 37 Three Star-Delta 90
350BZ645H TO350BZ645H 45 Three Star-Delta 90
350BZ655H TO350BZ655H 55 Three Star-Delta 90
350BZ475H TO350BZ475H 75 Three Star-Delta 90