Water & Wastewater Asia November/December 2020

52 ON OUR RADAR
Since its foundation in Japan in 1924,
Tsurumi Manufacturing Co., Ltd. has
been engaged in the manufacturing,
supplying and sales of various pumps
including submersible pumps as key product
as well as environmental devices and related
equipment.
True to its name, Tsurumi is now debuting
two 22kW models. The new models will
be added to its flagship KTZ-series of
submersible pumps which support a product
lineup from 1.5kW to 15kW.
The new kW models are available in two
types: KTZ422 (4-inch) and KTZ622
(6-inch). These pumps provide a maximum
head of 71m and maximum capacity of
4m 3 /min. Built with a cast iron body and
high-chromium cast iron impeller, the
pumps are durable and wear resistance.
For 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 while ensuring extended
operation at a low water level.
Heavy duty and highly reliable, the
KTZ-series are suitable for harsh work
environments such as mining, quarrying,
construction and tunnel work sites. In
addition, the Tsurumi’s original multidirectional
hose coupling structure enables
flexible on-site setup for either vertical
or inclined discharge with just a wrench.
This is on top of Tsurumi’s standardised
requirements for general submersible
pumps anti-wicking cable, motor protector,
dual inside mechanical seals with silicon
carbide faces, and Oil Lifter.
Additionally, as found on the 7.5kW and
higher motor output models of the KTZseries,
the 22kW models have seal pressure
relief ports in the pump unit which prevent
pump pressure from being applied to
mechanical seals.
The semi-open impeller mounted on the
KTZ-series is stronger against wear as
compared to closed impeller, which reduces
the performance degradation rate. This
results in easier maintenance as frequent
gap adjustment is not required. In order to
compensate higher thrust load that acts
on the bearings of the pump with closed
impeller, Tsurumi adopts a double bearing
KTZ pumps with multidirectional
discharge
and an impeller design that reduces the
thrust load for KTZ 22kW models.
These features are the results of the
innovative technologies and unmatched
know-how that Tsurumi has cultivated
over years of manufacturing pumps for
construction purposes.
In addition to these pumps, Tsurumi offers
a variety of pumps with excellent reliability
and durability that can withstand harsh
work conditions.
November / December 2020 • waterwastewaterasia.com