Catalog on Pneumatic Spray Nozzles
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There are may opinions on the classification of spray droplet sizes but IKEUCHI, "The Fog Engineers", have classified them as below, v___>

The pneumatic spray nozzle utilizes a high-velocity flow of compressed air and has the following features as compared with hydraulic spray nozzles. 1. Excellent atomizing performance The minimum average droplet size produced by hydraulic spray nozzles Is around 50pm(*1) but pneumatic spray nozzles can generate average droplet sizes smaller than 10|jm(*1), 2. Large turn-down ratio Pneumatic spray nozzles have large turn-down ratios of spray flow-rate(*2) with little variation in droplet size and spray distribution, which makes them ideal for spray flow adjustable nozzles. 3. Large free...

Where fine atomization is required---! Where viscous liquid is sprayed--- Where a large turn-down ratio is required- ■ 1 Where extremely small spray capacity is required-

1. Air-liquid mixing systems Three air-liquid mixing systems are available for atomizing liquid. Internal mixing type Compressed air and liquid are mixed inside the nozzle. Generally, this type is excellent for atomizing liquid. velocity of the droplets results In a strong Impact force. Furthermore, the turn-down ratio Is larger and this type Is suitable for cooling objects In high temperature range. Impinging type Compressed air and liquid are mixed outside the nozzle. Hence, this type dogs the least. This Is also classified Into Inner air type and outer air type. Air-stream entraining...

Two liquid feeding systems are available. One is the liquid pressure system and the other is the liquid siphon system. 3. Spray pattern Spray pattern means the cross sectional shape of spray. As illustrated, spray patterns are available in cone spray (hollow cone spray and full cone spray), flat spray, and liquid film spray. The best spray pattern among them can be selected for each application. Hollow cone sprays and full cone sprays are suitable for humidification, cooling gases, chemical reactions and moisture control, etc., while flat sprays and liquid film spray are suitable for...

For each series of pneumatic spray nozzles, the most commonly used pressures or pressures at which the characteristics can be achieved are defined as the standard pressures. The figures in this catalog are based on compressed air and tap water at room temperature and the pressures are measured at the immediate upstream of each nozzle. The spray angle is measured at the top of the spray made by straight lines extending along the outer edges of the spray. Pneumatic spray nozzle's flow velocity is so fast that the specified spray angle is maintained only at the top of spray. For nozzle...

Principle and features Proper range of droplet size measurement Immersion sampling method Droplets are collected on a glass plate coated with silicon oil and are immediately photographed at high magnification for subsequent scanning. As the collected droplets remain suspended in the silicon oil, they are measured as perfect spheres. However, ultra-fine droplets are incapable of breaking the surface tension of the oil and will evaporate without settling. Thus, the average droplet size determined by this method is larger than the actual value. Fraunhofer diffraction method A laser beam...

2) Mean droplet diameter ■Example of calculation of Sauter mean droplet diameter Measured results differ depending on each measuring method. Assuming the droplet diameter measured by the immersion sampling method as 1, the correlation of Sauter mean droplet diameters among three measuring methods is shown right. Good care must be exercised in evaluating droplet diameter because droplet diameters differ depending on each measuring method as described above. In comparing spray droplet diameters of several different spray nozzles, needless to say, the measuring method applied must be uniform...

The spray distribution means the distribution of spray capacity in the spray width direction. A mountain-shaped distribution is useful in producing uniform spray distribution across the entire spray width by overlapping patterns in multiple-nozzle arrangements, while even spray distribution is suitable for applications that require uniform spray distribution by one nozzle. The spray distribution depends on operational conditions such as spray height, pressure and other conditions. The turn-down ratio means the ratio between the adjustable minimum spray capacity and the maximum spray...

The standard and optional materials available for nozzles are shown in the material section of each nozzle series, using the material codes listed below. As "The Fog Engineers", we, IKEUCHI, have been developing nozzles in a variety of materials to meet the desires and applications of our customers. We were the first to develop ceramic orifice-inserted spray nozzles and succeed in marketing them throughout the world. Material] Stainless steel 303 Stainless steel 304 Stainless steel 304L Stainless steel 316 Stainless steel 316L Stainless steel 321

Spray Capacity {IIhr) _(Immersion Sampling Method) Small capacity fine tog nozzles — Liquid siphon type CBIMV-S (Flat spray) CBIMK-S (Hollow cone spray) BIMV-S (Flat spray) BIMK-S (Hollow cone spray) Liquid pressure type -CBIMV (Flat spray) CBIMJ (Full cone spray) CBIMK (Holow cone spray) BIMV (Rat spray) BIMJ (Full cone spray) BIMK (Holow cone spray) f- Medium-large capacity fine fog nozzles GBIM GSIMI AKIJet® LSIM JOKIJet® DOVEA DDA JJA DOWA-G WEA PSN [Spray conditions] Smal capacity Fra fog nozzle: spray capacity at air press. 0.3MPa & liquid press. 0.1-0.3MPa, air consumption at air...

/\ (Spray width: 280rrim at air pressure of \ 0.2MPa and liquid pressure of 0.1 MPa) \ \ •Minimum passage diameters \ of each part (approx, value) \ Description for taper pipe threads Threads noted in this catalog are taper pipe threads (PT) unless otherwise specified. *M” denotes male thread and °F° denotes female thread. (Example) 1/8M: 1/8' male thread (PT), R1/8