When the Northern Beaches Council needed a seawater pump to fill and flush its beachside pool at Freshwater, it bought a Tsurumi cast 316 stainless steel submersible. The council has been using Tsurumi SFQ series pumps to circulate the water in their pristine pools for many years.
“There are a number of these submersibles installed in various pools on the North Shore, circulating seawater to maintain a healthy swimming environment,” Australian Pump Industries’ Tsurumi Product Manager, Neil Bennett, said.
“These pumps don’t fail from corrosion; the last one only choked when blocked with a discarded shoe. We’ve been told by the council that these pumps generally last eight to ten years in the pools.”
Tsurumi SFQ series 316 cast stainless steel submersibles are designed to handle a range of corrosive applications, including saltwater. Conventional cast iron and lower grade stainless steel pumps are literally eaten away by seawater.
The SFQ range includes two and three inch three phase pumps, with heads up to 44m and flows up to 2,000LPM. The ones used in the pools on Sydney’s Northern Beaches have a three inch outlet and are powered by a 7.5kW two pole motor. They feature a high capacity open style impeller that will handle sand and solids to 23mm.
Built to last in harsh environments
The big difference with Tsurumi’s SFQ series is their unique stator housings which are cast and machined 316 stainless steel, meaning they last longer. Casings, impellers and suction covers are also cast 316 stainless steel.
The grade of stainless steel used has a higher content of carbon for strength, as well as a high proportion of nickel and molybdenum for improved corrosion resistance. No welds are required, which means no pitting and reduced oxidisation. This material is also capable of withstanding abrasive liquids.
On the Northern Beaches, the council also fits anodes to prevent electrolysis which occurs when two dissimilar metals come into contact. These are replaced annually as part of the council’s winter maintenance routine.
Tsurumi incorporate a number of features that enhance the life expectancy of the pump and cut maintenance costs. These include a unique anti-wicking cable gland, which prevents water from wicking down inside the cable. The motor is protected even if the cable is damaged or the end accidentally immersed.
All Tsurumi pumps have a double silicon carbide mechanical seal. Both seal surfaces are submerged in an oil chamber, well away from the pumped liquid. A patented oil lifter ensures the mechanical seal faces are always lubricated and cooled, even if the pump is installed horizontally.
Tsurumi Pump developed the product range in response to requirements in the Japanese market for super tough pumps for the chemical industry. Like all Tsurumi pumps, they are backed by a three year warranty against faulty material or workmanship.
A comprehensive, free literature pack is available as well as application data, support and free advisory service from the Australian Pump Industries’ engineering team.
For further information, visit www.aussiepumps.com.au or call 02 8865 3500.
