New 240v high head submersible
duty, single phase, high head submersible pump has been released by Australian Pump. Manufactured by Tsurumi and based on the KTV range of dewatering pumps, the 80mm pump is described as a breakthrough in single phase pump design.
The model NK3-22 offers heads of up to 24 metres combined with flows of up to 525 litres per minute and really pushes the boundaries for performance of a single-phase submersible according to Neil Bennett, Aussie Pumps Product Manager. “It makes an ideal emergency dewatering pump as it’s quick to set up, will run on normal 240-volt circuit and pushes out a huge amount of water,” he said.
Aimed at the plumbing, hire and construction markets, the portable pump has been designed to handle abrasive liquids. It has a ductile cast iron impeller and vulcanised wear plate.
The model features a 2.2 kW dry type submersible induction motor encased in aluminium pump housing. The dry weight of the pump is only 29 kilos.
The heart of the system is a semi vortex impeller that allows the passage of small solids up to 6mm. The unique impeller design accelerates the water passing through the pump casing, creating a vortex that assists the smooth transit of solids in suspension.
The pump has a double mechanical seal of silicon carbide located in an oil chamber. The oil chamber contains a patented “oil lifter” that provides forced lubrication to the mechanical seal. This ‘unique’ Tsurumi design provides real advantages to the user in extending seal life, says Australian Pump.
Water incursion through the cable entry is the main source of failure in submersible pumps but all Tsurumi pumps are fitted with an anti-wicking cable entry block. It protects the motor from moisture wicking inside the cable in the event of the cable being damaged or the end submerged.
The NK3-22 has a 3” top discharge port and a “slimline” body design that is provides a double benefit to users, said Bennett. “The first is that there is no side discharge elbow to be damaged in the tough treatment that pumps like this get on construction sites. The other is that the pump’s motor is automatically cooled by the water running through the housing. That adds up to longer life, more consistent performance and overall long term cost savings”.
Like all Tsurumi pumps offered by Australian Pump Industries the NK3-22 single phase pump comes with a three-year warranty.