page top

Kawamoto Pump Mfg. Co., Ltd.



From left
1st: Manual type (Floor mount)
2nd: Automatic type
3rd: Automatic alternate type
4th: Manual type (Pedestal support type)


  • Discharge of sewage and sump from buildings, factories, hospitals, apartments, etc.


  • The closed-type non-clog impeller and our original casing structure provide high pumping performance.
  • Equipped with a motor with built-in auto-cut (7.5kW or less) to prevent motor burnout.
  • Motor with output of 11kW or above can detect abnormal temperature rise of the motor coil and output as an external signal. (Implement a circuit in the control panel when use it as a protection devise)
  • Two types available: flange type and pedestal support type for easy maintenance and inspection.
  • Built-in automatic type ("L") and automatic alternative type ("LN") with float switch are available.
  • Protection circuit for electric parts is equipped on the models with float switches.
  • Evaluated item* of by (C) Public Buildings Association., Ltd. in Japan. * BU4-H type does not completely match.
  • High pump head type (BU4-H type) is also available.

Standard spec

Application liquid
Fluid quality: For sewage (Hydrogen ion concentration pH5~9)
Fluid temperature: 0 to 40 °C
Impeller: Cast iron
Shaft: SUS420J2
Casing: Cast iron
Type: Dry-sealed motor (auto-cut built in 7.5kW or less)
Power source: Three phase
Speed: 50Hz: 1,500 min-1, 60Hz: 1,800 min-1
Max. submersing depth
Max. submersing depth: 8m
Impeller: Non-clog
Shaft sealing: Double mechanical seal (liquid side: SiC x SiC, Motor side: Ceramic x Carbon)
Seal oil: Turbine oil
Bearing: Closed ball bearing
Flange figure
Flange figure: JIS10K thin type
Paint color (Munsell No.)
Paint color (Munsell No.): Scarlet (5R3/12)

Standard Accessories

Flange type: Pump body(with 10m 4 core submersible cable)

Flange type: Connecting bend pipe(Bolts for attaching pump body with companion flange (exclude 150mm bore size models))

Pedestal support type: Pump body(with 10m 4 core submersible cable)

Pedestal support type: Connecting pipe(Bolt for attaching pump)

Pedestal support type: Pedestal support(One set support with companion flange (exclude 150mm bore size models))

Pedestal support type: Chain(4m)

Optional Accessories

Control panel
EBA type full water level alarm control panel
EFS type trouble detector for drainage pump
Check valve for sump
Float switch