Catalog on pneumatic spray nozzles
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There are many opinions on the classification of spray droplet sizes, but IKEUCHI, "The Fog Engineers", have classified them as below, vJ

1. Excellent atomizing performance The minimum average droplet size produced by hydraulic spray nozzles is around 50 pm*1 but pneumatic spray nozzles can generate average droplet sizes smaller than 10 pm.*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 passage diameter Pneumatic spray nozzles have larger free passage diameters as compared with hydraulic spray nozzles, which is effective for reducing clogging...

Where fine atomization is required-■■ I Where viscous liquid is sprayed-■■ Where a large turn-down ratio is I Where extremely small spray required-■■ I 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. External mixing type This internal mixing type is further classified into three types. 1. Inner air type Compressed air flows in the center of the nozzle, while liquid flows along its circumference. This type provides an important benefit with a larger free passage diameter which minimizes clogging. 2. Outer air type Liquid flows in the center of the nozzle, while...

Two liquid feeding systems are available. One is the liquid pressure system (using pressurized liquid) and the other one is the liquid siphon system (using liquid sucked up by compressed air). 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. It is important to select a spray pattern suited for each application, thus, delivering the optimal nozzle performance. Hollow cone sprays and full cone sprays are suitable for humidification,...

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...

Measuring method 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...

Mean droplet diameter is one of the important factors in selecting nozzles and designing nozzle-related equipment. Commonly used ■Example of calculation of Sauter mean droplet diameter It is often used in chemical processes such as cooling, evaporation, combustion and drying, where efficiency is determined by the ratio of volume to surface area, i.e. specific surface. Because a small portion of large droplets is more influential over the rate of reaction than a large portion of small droplets, it is advisable to use Sauter Mean Droplet Diameter as the representative droplet size. Sauter...

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 changes depending 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...

Small capacity fine fog nozzle: spray capacity measured at air pressure of 0.3 MPa & liquid pressure of 0.1-0.3 MPa, air consumption at air pressure of 0.2-0.4 MPa Medium-Large capacity fine fog nozzle: spray capacity measured at air pressure of 0.3 MPa & liquid pressure of 0.2-0.5 MPa, air consumption at air pressure of 0.3-0.4 MPa Semi-fine/Semi-coarse fog nozzle (except PSN): spray capacity and air consumption measured at air pressure of 0.1-0.4 MPa & liquid pressure of 0.07-0.7 MPa Semi-fine/Semi-coarse fog nozzle (PSN series): spray capacity and air consumption measured at air & liquid...

The standard and optional materials available for nozzles are shown in the material section of each nozzle series, using the material codes listed below. Listed below are the materials of nozzles and parts, and resistance characteristics of each material against common chemicals. For special applications, please contact us. Materials Items O: Suitable A: Possible for short term use X: Unusable Note: The heat resistance (operating temperature limit) of spray nozzles varies widely depending on the operating conditions, environment, liquid sprayed, etc.

•Spray nozzle specifications are shown in the respective tables. •Spray pattern and spray distribution <Jable> f Spray angle code (110) Air consumption code (02) £/min, Normal: £/min at Normal Conditions (0°C, 1 atm) •Air consumption (estimated value) at the specified pressures (Estimated air consumption is 25 l/min, Normal when air pressure is 0.4 MPa and liquid pressure is 0.15 MPa) Spray width at the specified pressures (280 mm at air pressure of 0.2 MPa and liquid pressure of 0.1 MPa) • Minimum passage diameters of each part (approx, value) (^Spray capacjtyXi/hr) 8<$jr <dLiquid...