Spray Nozzles Technical Information
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- Technical Information
Technical Information
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Fundamentals of Mist
Quality..... Mean droplet diameter, Droplet size distribution, Droplet velocity and Spray pattern
Volume..... Spray capacity, Spray impulse and Spray distribution
IKEUCHI has been and will be further pursuing methods to generate and utilize mist, striving to meet any needs of our customers.
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Research and Development
| IKEUCHI delivers ideal, high-precision mist to industrial world developed by its own independent R & D system.
Taking as our theme the provision of nozzles for a variety of liquids with droplet diameters that can accommodate all purposes, and in shapes that are easy to use, IKEUCHI, "The Mist Engineers", has engaged ourselves in the research and development of new technology.
Based on our accumulated advanced technology and know-how as mist engineers, we are further pursuing methods to generate and utilize mist, striving to meet the ever diversifying and advancing needs of our customers, and to contribute to the greater development of the industrial world. The progress of industrial spray nozzles is our history and future.
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Measurement of Droplet Size and Velocity
Spray droplet size and its velocity are measured instantaneously by Laser Doppler Analyzer.
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Measurement of Spray Distribution
Spray distribution is an important factor to select spray nozzles.
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Analysis of Spray Angle and Spray Volume
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Measurement of Spray Impulse
Spray impulse has much effect on washing and cooling results.
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Simulation of mist generation
IKEUCHI will confirm the performance with a simulation model.
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Spray Droplet Size
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Droplet size in a given spray may vary from sub-microns to thousands of microns.
As the representative of droplet size, we use Sauter Mean Diameter in catalog charts, which is a droplet size of spray generated at standard pressure for each nozzle and measured at the point that is most practical distance from nozzle orifice.
Classification of Spray Droplet Size
There are many opinions on the classification of spray droplet sizes but we, "The Mist Engineers", have classified them as shown in the figure.
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Fundamentals for Selecting Spray Nozzles
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The spray pattern means the cross sectional shape of the spray.
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■Spray Angle
The spray angle is measured at the top of the spray made by straight outside part of the spray.
■Spray Capacity
The spray capacity (volume capacity) increases as density of the liquid to be sprayed becomes lighter and the spray pressure becomes higher.
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Spray Distribution
The spray distribution means the spray flow distribution in the direction of spray width.
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Spray Droplet Diameter
Mean droplet diameter, which is an important factor in selecting nozzles and designing nozzle-related equipment, varies depending on the type of the spray nozzles, liquid pressure and spray capacity.
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Accuracy Guarantee on Spray Nozzles
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IKEUCHI's spray nozzles are guaranteed for the spray capacities, spray angles and spray patterns
■Spray Capacity
Spray capacities shown in our catalogs are based on city water of room temperature and spray nozzles are guaranteed for the spray capacity within ±5% under the standard pressure, which is set for each nozzle series.
■Spray Angle
Based on city water of room temperature, spray nozzles are guaranteed for the spray angle within ±5°under the standard pressure, which is set for each nozzle series.
The spray angle is measured at the top of the spray made by straight outside part of the spray unless otherwise specified.
■Spray Pattern
Spray pattern, which is the cross sectional shape of the spray, is subject to our strict inspection as well as spray angle and spray capacity. Only the nozzles that meet our standards will be shipped.
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Materials of Spray Nozzles
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| ■As the experts of spray nozzles, we, IKEUCHI, have been developing the nozzles in a variety of materials to meet the desires and applications of our customers. We had developed ceramic orifice-inserted spray nozzles and succeeded in marketing them for the first time in the world. The materials of plastic nozzles and parts are shown as follows. Please inquire with us for special applications.
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Wear-resistance of ceramics
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■Wear-resistance of ceramics
Ceramic orifice of CERJETR is outstandingly superior to metals in wear-resistance and can be lasted 20 to 30 times longer than stainless steel and several hundred times longer than brass nozzles.
The graph below shows the increase in flow of each nozzle due to the worn orifice and the shadowed area shows the overly sprayed flow of stainless steel nozzle.
■VNP-15 and VNP-25 degrees type with Brown ceramic orifice enjoys higher wear-resistance.
Newly developed Brown ceramic orifice, which has higher wear-resistance than a conventional ceramic orifice, is adopted in standard VNP-15 and VNP-25 nozzles (VNP-series having spray angle of 15 and 25 degrees).
The chart shows the rate of increase in spray capacity by nozzle orifice getting worn and you can see how higher wear-resistance Brown ceramic orifice has, compared with a conventional ceramic orifice.
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The finest mist with its droplets' size distributed in a very tight range
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As shown below, there is significant difference between each droplet size sprayed by the conventional pneumatic nozzle and by AKIJetR under the same condition.
Large sized droplets do bad things in humidification; they hit objects and make them wet.
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Why does not Dry Fog make things wet?
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| Since small bubbles bounce when they hit obstacles and do not burst as illustrated, they do not make things wet. Large bubbles burst and make things wet. Droplet size of Dry Fog is so fine that it won' t burst, hence it won' t make things wet.
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Spray Droplet Diameter
Spray Droplet Size by Various Humidifiers
Dry Fog condition: Maximum droplet diameter 50 microns or less and mean droplet diameter 10 microns or less.
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The followings are pictures of droplets collected by Immersion Sampling and droplet diameter distribution measured by the laser analyzer.
AKIJet ® nozzle produces Dry Fog with the maximum droplet diameter of 50 microns or less and Sauter Mean Droplet diameter of 5.9 microns.
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Relationship between Humidity and Static Electricity
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| When the relative humidity is over 55 - 60%RH, static charge is not accumulated. According to the results shown in the chart, static charge can be avoided when relative humidity is kept above 55 - 60%RH. Maintaining the relative humidity at 55 - 60%RH solves the problems caused by static electricity, such as sticking dust, etc.
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Water-saving Descaling Nozzles
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TDSS series nozzles are water-saving descaling nozzles that have as strong spray impulse as conventional descaling nozzles with less water consumption.
Why water-saving?
Conventional nozzles produce flat spray pattern by clashing water flows in the nozzles as illustrated below, which results in reducing the speed of water flow and spray impulse. On the other hand, IKEUCHI's newly developed nozzle orifice, which sprays without clashing water flows and therefore no loss on spray impulse, produces stable flow with high spray impulse, adopting a new stabilizer with a strainer.
This newly designed spray orifice and stabilizer produce a thin water flow like a sharp razor blade and realize water saving by 10 - 20% with providing the same descaling effect as before.
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