Flat Fan Spray Nozzles

Tapered flat fan nozzles concentrate spray volume at the center and taper toward the edges, requiring approximately 30–50% overlap between adjacent nozzles for uniform coverage. Even (uniform) flat fan nozzles distribute spray evenly across the entire width, eliminating overlap requirements. Tapered patterns are commonly used for spray bars and multi-nozzle arrays, while even patterns are preferred for single-nozzle applications or when precise band coverage is required.

Spray angle selection depends on the required impact and coverage. Narrow angles (15°–25°) provide maximum impact for tough cleaning, high-pressure washing, and cutting applications. Medium angles (40°–65°) work well for general cleaning, rinsing, and coating where balanced coverage and impact are needed. Wide angles (80°–110°) provide large area coverage for spray bars, gentle rinsing, and applications where fewer nozzles are preferred. Coverage width can be estimated using the formula: Width = 2 × Distance × tan(Angle ÷ 2).

Flat fan spray nozzles are available in multiple materials depending on operating conditions. Brass offers general duty performance and cost effectiveness. 303/304 stainless steel provides improved corrosion resistance and durability. 316L stainless steel is recommended for food processing, pharmaceutical environments, and harsh chemicals. PVDF or polypropylene options provide lightweight non-metallic construction with chemical compatibility. Tungsten carbide inserts are used for extreme wear resistance in abrasive fluid applications.

Flow rate depends on the nozzle orifice size (capacity rating) and operating pressure. A common formula is Q₂ = Q₁ × √(P₂/P₁), where Q represents flow rate and P represents pressure. For example, a nozzle rated at 1 GPM at 40 PSI will flow approximately 1.22 GPM at 60 PSI. For precise sizing, refer to product capacity charts or use a spray nozzle flow rate calculator.