Home' Smart Farmer : June 2012 Contents June 2012
INTER is the time to
make sure your property
is bushfire safe.
With vegetation at its most dor-
mant and daytime temperatures
manageable for clearing and cleaning
up, it is now that landholders should
be investing the time and effort that
may save your family, pets, livestock
and property come a summer bush-
Country Fire Service prevention
services manager Leigh Miller said
while it was impossible to eliminate
the risk of fire, property owners
could introduce measures to reduce
He said there were a number of
key measures property owners
should be taking during the winter
"A good thing to remember is that
by reducing the amount of fuel
around your property, you reduce
the threat of bushfire," he said.
Mr Miller said some of the key CFS
winter bushfire preparation tips
•Reducing fuel around property
assets by cleaning up undergrowth,
branches and materials next to
buildings, stock, crops, fences, hay
stacks and fodder resources. Fuel
breaks should be a minimum of five
metres wide, although up to 20
metres is recommended for build-
•Grazing, slashing, ploughing,
harrowing and mowing are all effec-
tive land clearing methods.
Maintaining breaks should be an
ongoing task, particularly as summer
•Fodder reserves, such as
haystacks and silos should be well-
sited and protected as they may pro-
vide the only feed for livestock
following a fire. Although silage is
non-flammable any fire in its vicinity
could make it unpalatable to stock
due to smoke taint.
Mr Miller said winter was also the
perfect time to overhaul machinery.
He said people should make sure
items such as mowers, slashers,
angle grinders, welders and oxy cut-
ting tools were in good working
order because many bushfires started
when they were used inappropriate-
ly or faults developed in equipment.
The following tips can help reduce
the risk significantly:
•Keep spark arresters clean.
•Check the exhaust system for
•Regularly move dry grass and
stubble from vehicles, particularly
near exhaust systems, stone guards
and bash plates.
•Keep machinery clean of oil and
•Inspect fuel lines and tanks for
•Check brake adjustments.
•Lubricate machinery regularly to
•Keep battery terminals and elec-
trical wiring in good order.
•Store machinery away from crops
CFS advice leading up to and into
the bushfire season can help land-
holders prepare their properties to be
bushfire-ready this summer.
All the information needed to pre-
pare a property over winter for the
following bushfire season can be
found by visiting the CFS website or
by contacting the Bushfire Hotline
on 1300 362 361 (TTY 133 677).
• Need to know more?
1300 362 361
Winter should be the time landholders
start clearing and cleaning up their
property in readiness for the summer
Impossible to eliminate risk
Haystacks, silos must be well-sited
Property safety plan crucial
LANDHOLDERS buying a new pump
are confronted with a vast array of
options for managing their watering
systems for household use, irrigation,
watering livestock or firefighting.
Before buying a new pump, it
makes a lot of sense to check out
what is available, how it works and
that it is suitable -- right type and
capacity -- for the job.
There are two broad groups of
pump types: positive displacement
and rotary dynamic -- and within
these two categories, there are many
Examples of the positive displace-
ment pumps are the reciprocating
types of bucket, plunger, piston, ram
and diaphragm, plus a few others
which can be classified as less com-
mon, including the swinging vane,
screw, semi-rotary and gear types.
A positive displacement pump must
put out as much water as it takes in --
the flow cannot be restricted by valves
-- without damaging either the pump
and/or its drive.
But in recent years, the popularity
of positive displacement pumps has
been overtaken by the more flexible
centrifugal types -- and for general on-
the-land use they are hard to beat.
Centrifugal pumps are known as
rotary dynamic or pressure-raising
pumps and include spur gear units
(used on many crop-spraying
machines and in many tractor
hydraulics). Axial flow or impeller
types work by spinning the water at
high speed to create the pumping
At the outer edge of the impeller,
the water hits maximum speed the
pressure builds up and forces the
water through the outlet.
The bigger the pump and the faster
the speed of the impeller, the higher
the capacity of the pump in lift (head),
volume of water and delivery pres-
This system has several advantages
over standard positive displacement
• Output can be controlled by an
outlet valve without causing any dam-
• It becomes more efficient (up to
90 per cent) as the flow rate is
• It has fewer moving parts to ser-
vice - maintenance costs are about a
third compared to positive displace-
• It is much more adaptable to elec-
tric drive -- centrifugal pumps are
designed for peak efficiency at stan-
dard electric motor speeds of
2880rpm and 1440 rpm.
In recent years, the development of
advanced plastics has had an enor-
mous impact on centrifugal pump effi-
Smooth internal surfaces on the
pump body and impeller have given
rise to significant cuts in friction loss.
This progress, together with high
efficiency electric motors, has led to
the wide range of centrifugal pumps
now on the market.
For high-pressure low-volume appli-
cations, such as pumping water from
bores for stock and household use,
multiple stage centrifugal pumps are
•Need to know more?
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