Delta Electra-Pro Ultraviolet Sterilizers
Get ready for a lesson
in ultraviolet Technology for the pond!
There are many ultraviolet sterilizers available on the market today. However, there are only 2 or 3 that stand out above the rest. And of those we have been distributing the very dependable Delta EP Series sterilizers since 1998. The Electra Pro UV employs a full 6" stainless steel disinfecting chamber and will accommodate the increased flow rates of today's high volume filtration systems, and utilizes high intensity lamps. This power increase along with the increased exposure time of the large diameter bodys means that a single lamp will treat a pond of 5,000 to 40,000 gallons, rather than using up to 6 lamps in a competitive model once per year, at not so cheap of an annual bulb maintenance price tag. The Delta lamp will perform for 13,000 hours at excellent efficiency. That is just over a year, with only one lamp to replace when the bulb expires. Although some of the larger lamps are not at first glance cheap. They are phenomenally cheaper than having to replace as many as 6 lamps of a competitive models.
For those of you who are interested in the technical information please read on. The ultraviolet wavelength for germicidal lamps is 253.7 nanometers. Lamps which emit this wavelength are known as ultraviolet germicidal lamps. This ultraviolet light is radiated at energy levels which are rated in micro-watts per second. NOTE: The Electra Pro's high intensity output lamp along with the stainless steel reflecting chamber provides a total of 90,000 micro-watts inside the chamber. That is 90,000 micro-watts per second. In order to destroy microorganisms we must expose the microorganism to the micro-watts for a minimum of one second. There are many factors that contribute to the effectiveness of ultraviolet light in this type of disinfecting. There are two main factors that affect the "kill factor" with this type of sanitation. Water flow or exposure time and water clarity. Water flow and exposure time go hand in hand so we will address this combination as exposure time. The amount of time needed for destruction of any microorganism is based upon a certain micro-watts for a minimum of one second.
For Example:
The maximum turnover rate for the average pond is once per hour and a minimum of once every four hours. Using a pond size of 6,000 gallons (including the water in the filtration system) and a turnover rate of once every two hours, we would need a pump capable of pumping approx. 3000 gallons per hour or 50 gallons per minute. Remembering we need an exposure time of one (1) second in order to kill the algae and micro-organisms, the Delta EP-5 for ponds to 5,000 gallons, would produce an exposure time of 1.35 seconds. Which is 30% more exposure than necessary to get the job done.
Electra Pro Exposure Time @75 Gallons per Minute Flow Rate
| Delta Model |
Shell Volume |
Flow Rating Base |
Exposure Time |
| EP-5 |
1.69 Gal. |
75 Gpm |
1.35 seconds |
| EP-10 |
3.11 Gal. |
75 Gpm |
2.48 seconds |
| EP-20 |
3.65 Gal. |
75 Gpm |
3.65 seconds |
| EP-40 |
4.74 Gal. |
75 Gpm |
4.74 seconds |
Micro-Organism Kill Rates for Ultraviolet Energy levels at 253.7 Angstrom Units Wavelength
Required for 99.9% Destruction of Various Microorganisms in Micro-Watt Seconds
Pay close attention to the Micro Watt Second exposure for the kill rate of Algae
and compare that to the other pathogens. Killing algae is just one benefit of Uv Sterilizers!
Pathogen
|
Virus Name
|
MWS Kill Exp.
|
| Algae: Chlorella Vulgaris |
Chlorella Vulgaris |
22000mws |
| Protozoa |
Nematode Eggs |
92000mws |
| Pritozoa |
Paramecium |
20000mws |
| Virus |
Bacteriophage E. Coli |
6600mws |
| Virus |
Hepatitis Virus |
8000mws |
| Virus |
Influenza Virus |
6600mws |
| Virus |
Polio Virus |
21000mws |
| Virus |
Rotavirus |
24000mws |
| Bacteria |
MWS Kill Exposure |
|
Bacteria |
MWS Kill Exposure |
| Aeromonas |
3620mws |
|
Agrobacteria Tumefaciens |
8500mws |
| Bacilus Anthracis |
8700mws |
|
Bacillus Magaterium |
2500mws |
| Ceratomyxa Shasta |
30000mws |
|
Clostridium Tetani |
22000mws |
| Esherichia Coli |
7000mws |
|
Legionella Bozemanii |
3500mws |
| Legionella pneumophila |
3800mws |
|
Leptospira Interrogans (Jaundice) |
6000mws |
| Mycobacter Tuberculosis |
10000mws |
|
Proteus Vulgaris |
6600mws |
| Salmonella Enteritidis |
7600mws |
|
Salmonella Typhosa (Typhoid) |
6000mws |
| Staphylococcus |
7000mws |
|
Shigella Dysenteriae1 (Dysentery) |
4200mws |
| Streptococcus |
8800mws |
|
Vibrio Cholerae |
6500mws |
This table of micro-organisms is by all means not complete, but renders a picture of the effectiveness
of ultraviolet sterilization for pond and or living environments, and also indicates a much greater importance
for a UV sterilizer than just killing algae.
Ultraviolet Sterilization is a proven, dependable and effective method for controlling and eradicating suspended algae spores, and bacteria in pond water. Ultraviolet light alters or disrupts the DNA and RNA of target organisms, and wipes them out.
Select the Delta - EP Series UV sanitizer sanitizer that is the perfect fit for your pond, water feature or culture, and enjoy the peace of mind that comes with the knowledge that your EP Series UV unit is automatically sanitizing the water all the time. For mere pennies a day, the EP Series UV Stainless Steel sanitizer delivers the highest water quality without any effort on your part.
With simple incorporation in the water feature’s equipment system, and powered from a standard 120V plug-in power connection, EP Series UV installation is a snap. With a 13,000 hour (1 year) UV lamp life, routine maintenance is reduced to a simple 15 minutes annual bulb change. UV system size selection is based upon a cross between the the output flow rate of the circulation pump and the turnover rate and size of your pond. The sizing chart below shows the maximum gallons per minute (GPM) flow rate for each EP Series UV model.
The table below is the factory disenfection table. While it is a reference, the tables above are more readily understandable.
| Ultraviolet disinfection EP RANGE SPECIFICATIONS |
| Model |
Max.
Flow Rate
GPM |
Max.
Flow Rate
m3/h |
Performance in millijoules per
cm2 at actual recommended flow
rates |
Pressure
max. |
UV lamp
Power |
Diameter of
reactor |
Total height |
Inlet/Outlet
diameter
PVC union |
| EP 5 |
26 |
6 |
30mJ/cm² |
40 psi - 3 bars |
1 x 30W |
6" - 150 mm |
17.5" - 444 mm |
2" - 63 mm |
| EP 10 |
53 |
12 |
30mJ/cm² |
40 psi - 3 bars |
1 x 58W |
6" - 150 mm |
24.5" - 622 mm |
2" - 63 mm |
| EP 20 |
70 |
16 |
30mJ/cm² |
40 psi - 3 bars |
1 x 80W |
6" - 150 mm |
38.6" - 981 mm |
2" - 63 mm |
| EP 40 |
80 |
18 |
30mJ/cm² |
40 psi - 3 bars |
1 x 90W |
6" - 150 mm |
45.8" - 1164 mm |
2" - 63 mm |
