Spraying Systems” AutoJet Model 1550 modular spray systems are designed to ensure accurate, precise placement of the liquid being sprayed to minimize waste and maximize quality in a range of operations. The system provides automatic on-off control of electrically- and pneumatically-actuated spray nozzles with greater precision than manual operation or devices such as solenoid valves. The system is compatible with Spraying Systems Co. automatic nozzles. When used with hydraulic PulsaJet automatic nozzles, very low flowrates can be achieved, eliminating the need for costly compressed air. Pulse Width Modulated (PWM) flow control is possible when the system is used with PulsaJet or AA250AUH nozzles. PWM flow control enables the use of larger nozzle orifices to reduce clogging and liquid use. The system is self-contained and compact, measuring 2.5 ft. (0.76 m) tall and 1 ft. (0.3 m) wide. The system is available in three configurations so users can purchase the needed level of control: liquid pressure only, liquid and atomizing air pressure or liquid, atomizing air and fan air pressure. Air-actuated diaphragm pump and pressure pot systems are available. The units are suitable for use in R&D, pilot and production operations.