Tsurumi equips its pumps with chromium impellers

Pump manufacturer Tsurumi is equipping several pump series with ultra-hard chromium impellers free of charge.

Extreme hardness: Tsurumi equips its pumps with chromium impellers
Extreme hardness: Tsurumi equips its pumps with chromium impellers - Image: Tsurumi.

The Japanese company, which has its European headquarters in Düsseldorf, Germany, is one of the world's largest manufacturers of dewatering pumps for the construction industry.

Tsurumi’s chromium equipped pump models can tolerate hard rock up to 30 mm grain size at a flow rate of up to 12 tonnes per minute.

The high chromium content of up to 28% makes the Tsurumi impellers extremely wear-resistant. Tsurumi says the material is five times more resistant to abrasion than grey cast iron or stainless steel. The hardness is 51 according to Rockwell, and 60 for Tsurumi’s GY pump series.

This puts the Tsurumi impellers on a par with the legendary Japanese Katana blades, in terms of hardness and cut resistance.

Tsurumi always uses semi-vortex impellers. In combination with its wear plates, the manufacturer says it achieves hydraulic efficiency levels similar to those of closed impellers without their disadvantages. By readjusting the wear plate, the optimal pressure point of the pump can be set even when the abrasion is already far advanced. The impeller can therefore run significantly longer which reduces the costs and maintenance times of the pump.

In Europe alone, Tsurumi offers more than 500 pump types with flow rates up to 30 cbm/min and 216 m maximum head.

Rocks in the water considerably reduce the service life of a pump - Image: Tsurumi.