Airless flat fan nozzles are the standard for high-production industrial painting. The paint is pressurized to 500–3,000 PSI and forced through a precision orifice, which breaks the liquid into a flat fan spray. The resulting Dv50 is typically 100–300 µm depending on pressure and paint viscosity. Higher pressure reduces droplet size and improves atomization quality but increases overspray and bounce-back. Airless nozzles are hardened tungsten carbide to withstand the erosive pressure-driven flow — painting nozzle life in production environments is measured in hectares or gallons sprayed, not time.

Air-assisted flat fan nozzles use compressed air to supplement hydraulic atomization — typically 40–100 PSI hydraulic pressure with 20–60 PSI atomizing air. The result is finer atomization (Dv50 50–150 µm) at lower hydraulic pressure, reducing bounce-back and overspray while improving coating uniformity on complex shapes. Used for higher-quality finish applications — automotive topcoats, furniture finishing, and thin-film coating processes where airless pressure would cause excessive bounce-back on shaped parts.

For spray adhesives at low-to-medium viscosity (10–200 cP), full cone nozzles at 20–80 PSI provide the most forgiving coverage pattern — the circular deposit tolerates minor part misalignment better than a flat fan. Flat fan nozzles are used on conveyor-line applications where a precise strip of adhesive must be applied to a defined width, such as carpet bonding lines or packaging glue applications.

For hot melt adhesives (EVA, polyamide, polyurethane hot melts), nozzle bodies must be compatible with operating temperatures of 250–400°F and the specific adhesive chemistry. Heated manifolds with individual nozzle bodies are the standard configuration. The nozzle orifice must resist plugging from cooled adhesive during shutdowns — heated purge cycles or heated standby are required to prevent adhesive solidification in the orifice.

For two-component adhesives and sealants, mixing nozzles that combine components at the nozzle tip are used to prevent pot-life limitations from causing in-line gelling. These are application-specific assemblies — contact our team with the two-component system's mix ratio, individual component viscosities, and pot life to determine the correct mixing nozzle configuration.

Die casting and forging die sprays apply water-based release agent concentrates (diluted 1:20 to 1:100 in water) through flat fan nozzles on automated spray wands or robot-mounted manifolds. The spray simultaneously releases, cools, and lubricates the die. Nozzle pattern must cover the full die face with 10–15% overlap between adjacent nozzles on the manifold. Automatic actuation synchronized with the press cycle is standard — nozzles are energized during the die-open cycle only.

Rubber mold releases use silicone-based or wax emulsion releases applied through full cone nozzles at 20–40 PSI. The circular pattern is better suited to 3D mold geometries than flat fan. For high-temperature compression molds above 300°F, PTFE seals and 316 SS bodies are required — the combination of heat, silicone chemistry, and steam flash is aggressive to most seal materials.

Chain and gear lubrication via spray applies a thin oil or grease-in-suspension film to moving parts. Flat fan nozzles at low pressure (10–30 PSI) directed at the pinch point between chain and sprocket are the standard approach. Oil mist systems using air-assisted atomization apply even thinner films — 1–3 µm dry film thickness — for precision machinery lubrication. Nozzle actuation is typically triggered by a rotation or cycle counter rather than continuous spray to minimize oil accumulation and waste.