Spray nozzle All kinds of cooling nozzles: High pressure nozzles designed to produce a 3 to 10 micron size water droplets. These nozzles operate by oscillating an impeller within a chamber at high frequency, shattering the water as it is forced out at.008 orifice. Applications for these nozzles include greenhouses, outdoor cooling, humidity control, odor neutralization, dust suppression, animal cooling, and anywhere a fine, pure water droplet is required. These nozzles are also used on our fan rings for aspirated fog applications. We have these nozzles fabricated in brass with a stainless steel impeller chamber and in solid 316 stainless steel. Each nozzle is mated to an anti-drip valve (check valve) that snaps each nozzle off @ 65psi. This feature reduces nozzle maintenance and will defeat the drip that can occur when the system is shut off or staged. The nozzle and the anti-drip valve are available separately, the check ball and spring are also available to rebuild the valve body. *? = 1 micron or 1/1000 of a millimeter evaporative cooling in concept On a hot sunny day, the moisture content of the atmosphere remains virtually constant; this means that the relative humidity is always lowest at the day\'s highest temperature. And the lower the relative humidity, the better the evaporative cooling effect is. In other words, the cooling effect is best when you need it most. The evaporation of 1kg of water gives the same cooling effect as the melting of 7 kg of ice. This is nature\'s own way of cooling air; It produces a considerable amount of cooling effect. The fog nozzle converts ordinary water into billions of Micron-size water particle. When operated at 1000 psi or higher pressure, the fog nozzle generates 10~15micron size Water droplets which flash evaporate when floating through the air. Since rapid evaporation takes place and residence time (time required to evaporate water particles in the air) is kept to minimum; therefore the fog nozzle is a nozzle fully Capable of achieving total evaporative cooling potentiality even in climates with high relative humidity.