Spray Characteristics
Air/Gas is introduced tangentially into the nozzle chamber in low pressure region of the swirling liquid, creating extreme turbulence and primary atomization. As liquid leaves the orifice, it impinges against the deflector ring which serves a dual purpose; close control of spray angle and break up of the spray into even finer droplets (secondary atomization).
Eight sizes of nozzle are available covering flow rates from 1-2400 GPH. Nominal spray angles of 50°, 75° and 100° can be attained by the specification of interchangeable nozzle caps. Contact the factory for special spray angles from 25° up to 160°.
The nozzle has demonstrated the capability of achieving mean droplet diameters in the 50-100 micron range at low air pressures and flows. When using dry steam instead of air, the steam pressure should be approximately four times greater than air pressure to achieve the same
spray characteristics. Comparable atomization in a hydraulic nozzle would usually require very high pressures. Degree of atomization is also variable by controlling the volume ratio of air to liquid.
As mentioned, droplet size may be changed by minor changes in air pressure. However, if air pressure is set initially, and it is necessary to modulate the liquid flow, the air differential pressure and flowrate will automatically respond in such a way that the quality of atomization remains nearly constant. In some applications, this can result in a saving through the elimination of air valving and controls.