Submersible Drainage Pumps KTZ422 (4-inch) KTZ622 (6-inch) MODEL

Two 22 kW models have been added to Tsurumi’s flagship KTZ-series of submersible pumps which support a product lineup of models ranging from 1.5 to 15 kW.
The new models are available in two types: KTZ422 (4-inch) and KTZ622 (6-inch). These pumps provide a maximum head of 72.5 m and maximum capacity of 4 m3/min. Built with a cast iron body and high-chromium cast iron impeller, these pumps are advantageous in terms of durability and wear resistance. As the discharge design of these pumps, a top discharge side flow structure is used, which enables the slim body to be installed in a confined space and also ensures extended operation at a low water level.
Owing to these features, the KTZ-series qualify as heavy-duty, highly-reliable and continuous duty pumps that are suitable for harsh work environments such as mining, quarrying, construction and tunnel work sites.
Also, the Tsurumi’s original multi-directional hose coupling structure enables flexible on-site setup for either vertical or inclined discharge with just a wrench.

Design Registration Pending*
* Tsurumi has applied for design registration in major countries.



  • 1. Multi-directional Hose Coupling

    Can be configured for inclined or vertical discharge, allowing for smoother installation.

  • 2. 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.

  • 3. Dual Inside Mechanical Seals with Silicon Carbide Face

    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

    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. Seal Pressure Relief Ports

    Protect the mechanical seal from pump pressure. They also protect the seal face by discharging wear particles.

  • 6. High-chromium Cast Iron Semi-open Impeller

    Resists wear caused by abrasive particles and enables the pump to maintain its original performance for an extended period of time.

Performance Curves

  • 50Hz
  • 60Hz

Model Selection

Model Motor
Phase Starting
L x W x H
Dry Weight*2
100 KTZ415 15 Three D.O.L.*1 12 428 x 350 x 934 146 8
150 KTZ615 15 Three D.O.L.*1 20 457 x 350 x 954 147 8
100 KTZ422 22 Three D.O.L.*1 8.5 528 x 413 x 1200 295 / 294 10
150 KTZ622 22 Three D.O.L.*1 12 558 x 413 x 1220 296 / 295 10

*1 Star-Delta available upon request

*2 Weights excluding cable

Product Information

Other motor output models available (1.5 - 15 kW).