For many applications, adjustability of liquid flow and, thereby, of the droplet size, is possible with the aid of manually operated accessory components.
A pneumatically controlled piston allows to perform automatic or intermittent operations. A number of special customized designs complete the nozzle range.
1. Spray pattern
Pneumatic flat fan atomizing nozzles should be chosen for humidifying and cooling of goods, for web dampening and for a number of painting tasks; in short, wherever a braod linear impact is required.
Pneumatic full cone atomizing nozzles, however, should be used, when a compact, circular impact or a major reach is required, e.g. for direct air humidifying, for gas cooling or for chemical process applications.
2. Mode of liquid supply
Whenever liquid can be supplied under pressure, it is recommended to use nozzles functioning by the liquid pressure principle. Use of pneumatic atomizing nozzles operating to the siphon or the gravity principle is recommended when liquid is to be sprayed in small quantities, e.g. for spraying of disinfectants.
3. Mixing of fluids
The supply of air or gas provides an additional breaking up of the liquid flow into finest drop particles. This supply and mixing can either take place inside or outside the nozzle.
Inside mixing should be preferred, when water, or low viscosity liquids or liquids without solid matter are to be atomized.
Outside mixing is particularly suited for atomizing viscous liquids which are prone to impurities and therefore tend to cause clogging of the nozzle. Low liquid pressures are used with this type of nozzle due to its design.