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Electricity is the most expensive
part of any pump - a simple fact that is often
overlooked when pumps and prices are compared.
It may be surprising that the purchase price and
maintenance costs account for less than 15% of the
total lifetime cost of a pump. Electricity
accounts for a staggering 85% or more of the total
costs. So if you want to save money, that's
where you should look.
The Grundfos CR makes a real difference; the table
below shows just how much electricity CR can save
you annually.
These savings will continue for years and years -
for every pump you own. Its low lifetime cost
makes a CR pump a very sensible investment.
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Efficiency saves money
year after year
Getting the
best possible overall efficiency out of your pump
makes financial sense. The narrow interval
between CR pump sizes allows you to eliminate the
efficiency drop associated with over-sized pumps.
By minimizing the difference between pump capacity
and the required pressure and volume, you get a pump
which runs as close to its optimum duty point as
possible. That makes it as cost-efficient as
possible.
The result of years of Grundfos development work is
a 10% increase in pump efficiency. This
translates into a power reduction of 15-20% for the
FR pumps. When pumps are in operation many
hours a day, such improvements provide substantial
savings - year in and year out
Let's talk money.
How
much difference does a Grundfos CR make?
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Application Type |
Typical duty point
per day |
Operating hours
per year with CR |
Average kWh
reduction |
| Water Supply |
350 gpm @ 85 PSI |
24 hours |
18,500 kWh |
| Boiler Feed |
175 gpm @ 225 PSI |
15 hours |
12,700 kWh |
| Water Treatment |
10 gpm @ 225 PSI |
15 hours |
3,200 kWh |
| Industrial
Washing and Cleaning |
25 gpm @ 225 PSI |
5 hours |
1,600 kWh |
| General
Industrial Pump Task |
25 gpm @ 145 PSI |
10 hours |
2,200 kWh |
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| BE > THINK > INNOVATE >>
GRUNDFOS |
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1. Internal Leakage caused by pressure
differentials within the pump was minimized.
Tests have shown that an impeller seal clearance
gap of just 0.4 mm between the impeller and the
chamber causes a 5% drop in efficiency.
When liquid seeps out into the pump, precious
energy is wasted on circulating that liquid.
Grundfos uses a floating seal ring between
chambers, providing a nearly perfect seal. |
2. An enhanced impeller design reduces
eddy flow and friction losses. Grundfos
developed a highly specialized laser-welding
technology which brings you impellers of truly
superior design and construction. |
3. State-of-the-art production technology
guarantees the best possible results and gives
the CR pumps the final edge. Grundfos
develops their own tools and processes to ensure
a perfect match between what they want to do and
the tools they use to do it. The final
outcome is products with near-perfect geometries
and tolerances, reflecting the care that has
gone into the research and development stages. |
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