Flux coating solutions for SMT wave soldering. Precise spray control for uniform flux deposition.
Sunandmountain PCB Flux Sprayers apply controlled flux coating to PCB bottom surfaces prior to wave soldering. Programmable spray volume, pattern width, and flux type settings ensure optimal wetting for leaded and lead-free processes.
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FT-450 Flux Sprayer
Max PCB width: 450mm
Programmable spray volume (0-100ml/min), adjustable nozzle pattern (50-300mm), support for RMA/RA/water-soluble flux types. Touch panel control with recipe storage (up to 50 programs).
FT-610 Flux Sprayer
Max PCB width: 610mm
Same features as FT-450 with extended width for large panel production. Ideal for automotive and aerospace PCB assemblies.
SMEMA Compliant Interface
All Sunandmountain PCB Sprayers support standard SMEMA 1.0/2.0 signal communication (DC24V input/output) for seamless integration with wave soldering machines and upstream/downstream equipment.
Get the Right Flux Sprayer
Tell us your PCB width, flux type, and spray pattern requirements. Our engineers will recommend the optimal configuration.
Frequently Asked Questions: Flux Spraying Equipment
What is the difference between spray fluxing and foam fluxing?
Spray fluxing uses a precision nozzle to atomize liquid flux into a controlled spray pattern, coating the PCB bottom surface uniformly. Foam fluxing blows air through a porous stone submerged in liquid flux, creating foam that contacts the PCB — a simpler but less precise method. Spray fluxing is essential for no-clean processes where flux volume must be tightly controlled (typically 0.5-2.0 g/m2), for boards with components near the bottom edge where foam cannot reach, and for selective flux application to only specific areas of the PCB.
What flux types are compatible with S&M spray systems?
S&M FT series flux sprayers support all standard solder flux types: rosin (R), rosin mildly activated (RMA), no-clean (NC), and water-soluble (OA). For lead-free assembly, no-clean fluxes with higher solids content (typically 15-25%) are recommended for reliable soldering. The FT-610 and FT-450 feature adjustable spray width from 50mm to full tunnel width, with flux volume controlled via servo-driven precision pump for repeatability of ±5% across production runs.
What board sizes do S&M flux sprayers support?
S&M offers two flux sprayer models: FT-450 (450mm tunnel width) and FT-610 (610mm tunnel width). Both support board lengths from 50mm to 600mm and thicknesses from 0.6mm to 3.2mm. The spray width is independently adjustable via servo-controlled nozzles, enabling selective flux application to only the solder wave contact zone rather than the full board width — reducing flux consumption by 40-60% on boards with localized through-hole areas.
How does spray fluxing integrate with wave soldering?
In a standard SMT line, the flux sprayer is positioned upstream of the wave solder machine, typically with a preheat zone between them. The flux sprayer coats the PCB bottom surface, then IR or forced-convection preheaters activate the flux and reduce thermal shock when the board contacts the solder wave. S&M flux sprayers integrate via SMEMA 1.0/2.0 signals (DC24V) with any SMEMA-compliant wave solder system, including third-party equipment from Ersa, Seho, or Kurtz.
What maintenance does a flux sprayer require?
Daily: wipe nozzle and sensor optics, check flux level, verify spray pattern uniformity. Weekly: clean flux filter and spray nozzle with designated cleaning solution. Monthly: inspect and lubricate conveyor guide rails, verify spray width calibration using test card with indicator paper. Annual: replace spray nozzle if pattern shows wear, calibrate flux volume pump, replace IR preheater elements if temperature variance exceeds ±5C.