In a pressure-fed system, the liquid is supplied under pressure to either internal or external mix BETE XA Series nozzles. Air and liquid regulators control the fluid delivery pressure, while the air filter and liquid strainer ensure that the supplied fluids are high quality. Operational control is maintained by manual or solenoid valves used in conjunction with the various hardware assemblies.

Liquid and air streams come together inside the nozzle and are mixed, and they exit through the same orifice creating a narrow-angle full cone spray pattern.

The streams are not independent; airflow changes will affect the liquid flow.