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SC-300 Swirl Coat Applicator

The SC-300 Swirl Coat® applicator increases flexibility and control by utilizing three modes of operations

  • The unique Tri-mode design offers bead, monofilament, and swirl modes - all in one applicator
  • Concentric fluid stream provides uniform thickness and consistent pattern width
  • Configurable for optimal fluid control performance to match specific applications
  • Simple maintenance - minimum wetted parts are easy to disassemble and maintain
  • Designed and tested to ensure high-quality performance
  • Optional Four-Position Tilt enhances access to hard-to-reach areas

Achieve the most versatile coating capability for high viscosity coating materials with the SC-300 Swirl Coat applicator. Flexibility is maximized by the ability to apply low and high viscosity conformal coating material in spot, line, and area-coat (bead, monofilament, and swirl).

Ideal for conformal coating applications, the SC-300 handles a wide range of materials varying in viscosity from 30 to 3500 mPa-sec (30 to 3500 centipoise). It is designed for use with solvent and solvent-less coating materials – supporting environmentally responsible practices.

The zero-cavity nozzle tip prevents material build-up during operation; it also allows for cleaning without disassembly. The use of advanced materials, smooth internal surfaces and exposed splines makes the SC-300 easier to clean. In addition, the SC-300 requires no special adjustment during re-assembly – coating performance and fluid sealing are not adjustment dependent, resulting in repeatable applicator response time.

For a broader selection of spray patterns, one of three airflow extensions can be fitted onto the main assembly. The airflow extensions along with the three spray modes provide conformal coating patterns to fit your application.

The high flow rate produces film builds quickly, while allowing for fine control. The fluid passage provides uniform fluid flow distribution. The air and fluid chambers are co-located so that there is rapid response to changes in operation - there are no long air-lines to delay response or to fail.

The SC-300 applicator is intended for use with the Select Coat® conformal coating system.

Modes of Operation

SC-300 Swirl Coat Applicator Tri-Mode - Bead, Monofilament, and Swirl

Bead: A stream of material is applied to the circuit board in areas where components are very close to non-coating or keep-out areas, or extra material is required for protection of high-impedance areas. The bead may also be used as a spot command for single coating of a single test point or component.

Monofilament: This pattern is created by controlling the fluid pressure and material flow passing through the nozzle. Auxiliary air circulating through the air passage strikes the material at a precise angle, causing it to spin on its axis and form a conical, looping pattern. The monofilament pattern is ideal for dispensing broad pattern widths, while maintaining good edge definition, resulting in faster cycle times.

Swirl: The swirl pattern is achieved by increasing air pressure and lowering flow settings. Angled jets impinge air upon the pressurized material exiting the nozzle creating a conical, swirling pattern. The swirling action helps maintain pattern shape resulting in excellent width control. Because the air jets cause slight atomization of the material, extremely thin film builds are possible. The mode is ideal for applications where moderate selective coating and thin film builds are required.


  • Laminate concentric flow results in symmetric fluid distribution
  • No process variations due to operator assembly
  • Consistent response time
  • Configured for optimized performance
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