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Product news 11

WORLD PUMPS October 2014

Nov Mono Australianpressure water systemNOV Mono has been nominated

as the preferred supplier for a

major new pressure sewer

network in Australia. Having

evaluated various other

alternatives, urban water

corporation Wannon Water has

chosen Mono’s InviziQ pressure

sewer system for the Dutton Way

project in Portland, Victoria.

The Dutton Way residential project

currently houses 180 properties

which are serviced by septic

sewage tanks. This fi gure will

increase to 314 homes, all of

whom will have the option to

install an InviziQ sewage pumping

system that feeds into the existing

Portland sewer network. The

InviziQ system is the answer for a

development like Dutton Way as it

will give each home access to an

eff ective sewage solution and can

be scaled up as new properties

are added over time.

Designed as an intelligent

alternative to conventional gravity

sewering options, InviziQ provides

controlled transfer of sewage, but

because it does not rely on gravity

it off ers the freedom to install

sewers in any area, irrespective of

the terrain, slope, environmental

sensitivity or topography.

http://www.monopumps.com.au/

WEG tests dual-pinion ball mill drive

As a multinational company, WEG

supplies a range of solutions to the

mining industry for driving large

mills, including low and high speed

motors, gearboxes and frequency

inverters across the globe.

Due to complexity and cost,

equipment is usually tested

individually; however, for this

important project, the whole unit

was tested as a complete system

before shipment to ensure

reliability, as required by the

application.

WEG’s laboratory is equipped

with state-of-the-art instruments

and test systems within an area of

approximately 1,000 m2. The

tests were carried out over a

period of four weeks and

included two 4,700 kW 30-pole

synchronous motors connected

back-to-back and directly coupled

to the shaft. They were driven by

medium voltage model MVW01

frequency inverters producing a

current of 1,178A at 3.3 kV

alongside a phase-shifting

transformer.

The equipment was tested at full

load and provided a torque of

250,000 Nm at the motor shaft,

recording the highest testing load

ever achieved by any electrical

equipment manufacturer in the

southern hemisphere.

http://www.weg.net/uk

Cavitation reportfrom Xylem‘Pump cavitation and how to avoid

it’ written by Bob Went, an expert

in pump system design at Xylem

Water Solutions, highlights

cavitation issues and in particular

the need for prevention measures

at the design stage.

“We have seen a signifi cant increase

in cavitation issues in the last fi ve

years, primarily due to poor pump

system design and a lack of aware-

ness about how cavitation is caused.

“Engineers in the water industry

are now expected to deal with a

very wide range of diff erent tech-

nologies and it is therefore imprac-

tical for them to be expert in all

areas such as system design and

cavitation problems,” says Bob

Went. “The result is that cavitation

related problems are on the

increase despite the fact that it is

an age-old phenomenon.”

Cavitation is caused when liquid in

the pump turns to vapour bubbles

at low pressure. The bubbles then

implode which creates a

shockwave that hits the impeller

creating pump vibration and

mechanical damage that ulti-

mately leads to pump failure.

http://info.xyleminc.com/Pump-

Cavitation-UK

NOV Mono’s InviziQ pressure sewer system

has been nominated by Australian urban

water corporation, Wannon Water, as the

preferred option for a major new network in

Victoria, Australia.

WEG supplies a range of solutions to the

mining industry.

Cavitation is caused when liquid in the pump

turns to vapour bubbles at low pressure.

WOPU0914_Product News 11 29-08-14 10:32:20