• Airspray atomization is the transformation of a liquid into a spray of fine particles.
In airspray atomization with spray charging electrostatics, a high velocity air stream intersects with a low volume, slow moving liquid stream in a small confined space, such as a Microbecide® electrostatic spraygun. The breakdown of the liquid into fine particles is achieved within the spraygun. When the spraygun is triggered, the air and liquid are mixed within the spraygun and an electrical potential is applied resulting in a stream of electrostatically charged particles. The particles are discharged from the spraygun by the remaining energy of the air stream. The air pressure/volume, liquid pressure/volume and viscosity of the liquid determine the size of the particles of the spray.
The Microbecide® TC-320 Sprayer was the results of over two years of development working with Microbecide® Partners and customers to address the unique needs found in applying water based nano coatings and Photo Catalytic Oxidation (PCO) agents such as Titanium Dixoide (TiO2).
Development of the Microbecide® Electrostatic Spraygun was prompted by the unprecedented demand we experienced in early 2020 for electrostatic sprayers. Specifically our customers asked us to provide a small, hand held, Electrostatic Spraygun with the capability to turn the electrostatics ON and OFF and to trigger the coating liquid flow OPEN and CLOSED on the spraygun while the sprayer was in operation.
The customer requirement was to quickly engineer and design an industrial grade product that would meet or exceed the performance and functionality of comparable electrostatic sprayguns available in the market. The challenge was to get all the functionality needed into the small space of a hand held housing. The Microbecide® Spray Charging technique is our proprietary spray charging circuit design, based on a 12VDC power source. The Microbecide® Electrostatic Spraygun utilizes airspray atomization for atomizing the liquid spray and a unique, pushbutton valve assembly for triggering the liquid on and off. The spray charging circuit can be turned on and off on the spraygun during operation of the sprayer.
We chose to use a commercially available hand drill type housing for our spraygun housing. We adapted the housing to our needs, consequently the on/off push button trigger for the valve assembly and the spray charging circuit switch are not normally part of the housing. We have placed emphasis on the functionality, ruggedness and performance of the electrostatic spraygun rather than the appearance aspects of the spraygun.
The Microbecide® Sprayer and Electrostatic Spraygun combine airspray atomization with proprietary Microbecide® Spray Charging Technology to deliver unparelled electrostatic performance and ruggedness for demanding applicators and operations.
Powerful, compact and quiet, the TC-320 electrostatic sprayers are optimized for water based coatings, designed for continuous operation and engineered specifically for spraying Microbecide® Photo Catalytic Oxidation (PCO) coatings. The flow rate of coating liquid is operator adjustable. The large, readily viewable flow gauge is panel mounted in the sprayer case. The electrostatics ON-OFF and the liquid flow OPEN-CLOSED controls are on the spraygun. Delivering a spray range of over three meters, the TC-320 electrostatic sprayer is simple to operate and easy to move about. The TC-320 electrostatic sprayer quickly increases operator productivity and significantly reduces application costs.Operating Enviornment
The operating environment of Microbecide® electrostatic sprayers may range from a hot, humid, unfinished building or office to the subdued, air conditioned elegance of a hotel lobby or a busy, crowded medical clinic. In work areas such as a hotel lobby, medical clinic or busy office, requirements for the sprayer to be quiet, unobtrusive, small and easy to move about are paramount.Operational Needs
Microbecide® Partners and customers operational needs of an electrostatic sprayer are much more rigorous than for a general purpose sprayer.
The electrostatic sprayer is often operated continuously for eight to ten hours a day on a job. The proper amount of coating material being applied is critical. Aqueous nano coatings are expensive, waste and overspray are crucial factors. PCO coatings are oxidizing agents and place the most demanding needs on Microbecide® electrostatic sprayers.
The electrostatic sprayer must be capable of applying a specific amount of coating liquid not only to floors and walls, but also to overhead ceilings, window tops and the upper area of walls. Clean up must be quick, efficient and thorough.
Operational needs of an electrostatic sprayer for applying water based PCO coatings are:
TC-320 Electrostatic Sprayer Specifications
The TC-320 electrostatic sprayer connects directly to a liquid coating container through an O-ring sealed, thumb-push, quick disconnect connector. The TC-320 sprayer incorporates a quiet, smooth operating, pump to deliver a consistent flow of coating liquid directly from any size liquid container to the spraygun. The sprayer utilizes an internal pump to transfer the coating liquid from a container and to pressurize the liquid line. The container should be positioned not more than one meter from the sprayer, there is practically no limit on the size of the container. This eliminates transferring the coating liquid to a tank, possibly introducing contaminates, and allows the unused coating material to remain clean and uncontaminated in the original container.
Constant pressure is applied by the pump to the spray (liquid) output line, similar to the pressure applied to the water line in your home. The pressurized liquid line insures a constant and consistent liquid flow through the sprayer hose to the spraygun, even when the spraygun is lifted overhead to spray ceilings, high window tops and the upper portion of walls.
The spraygun provides the operator the capability to turn the electrostatics ON and OFF and to trigger the coating liquid flow OPEN and CLOSED on the spraygun while the sprayer is in operation. The TC-320 sprayer allows the operator to accurately control the rate of flow of coating liquid delivered to the spraygun. The flow control valve allows the operator to adjust the amount of coating material being applied while in operation. Just as you can turn on, turn off and vary the rate of flow of water in your home by adjusting the water tap in your bathroom, the TC-320 system operator can control the flow of coating material to the spraygun.
The operator can adjust the amount of material applied per square meter, or adjust the rate of flow to achieve the desired square meters covered per litre of material. Go here to learn How To Set The Flow Rate.
Coating liquid is drawn directly from the coating container and delivered by the TC-320 electrostatic sprayer to the spraygun. When the operator disconnects from the coating container, clean, unused coating material remains in the container, available for the next job.
Clean up is thorough, quick and easy. Chrome plated, thumb push, quick connectors allow the operator to easily disconnect from the coating container and reconnect to a flush container filled with water or liquid cleaner.
The operator needs only to apply power to the TC-320 sprayer, fully open the flow valve and trigger the spraygun to thoroughly flush out the sprayer, hose and spraygun. Clogs, chokes and blockages are no longer a problem with the TC-320 electrostatic sprayer system.
The TC-320 sprayer plugs into a standard 220VAC electrical power outlet (110VAC, optional). The self-contained, internal air compressor is compact and powerful. The compressor provides increased air flow volume, extending the spray range and reducing the formation of droplets at the spraygun.
The enclosure hardware and integral components of the TC-320 sprayer are constructed of stainless steel. The TC-320 system liquid and air connectors are chrome plated, O-ring sealed, thumb-push connectors, for greater corrosion resistance.
Grounding straps of the air and liquid lines of the TC-320 sprayer further enhance the electrostatic charge of the liquid spray. A heavy-duty, high volume exhaust system is incorporated into the case to ensure continuous operation even in warm, humid environments.
The TC-320 electrostatic sprayer is small, inconspicuous and easy to move about. The sprayer case is two-wheeled, with stainless steel bearings and a retractable extension handle. The RoHS compliant case is non-conductive and highly chemical resistant. The circuit breaker protected, on⁄off switch is mounted at the top of the case, for easy operator access. The TC-320 sprayer dimensions are 56cm X 41cm X 25cm, the sprayer weighs in at 27 kg.
The spraygun is light and easy to use. The spraygun is self-contained with a rechargable, 12VDC power source. The electrostatics can be turned ON and OFF and the flow of coating liquid can be triggered OPEN or CLOSED on the spraygun by the operator while using the spraygun. The spraygun dimensions are 45cm X 20cm X 6.5cm, the spraygun weighs in at 2.5 kg.
With thorough flushing of the sprayer, hose and spraygun after each use, frequent cleaning of the spraygun and occasional application of silicon grease to the hose and spraygun connectors, clogs and blockages are no longer a problem.
Services, Partners, Warranty Support
A full stock of parts is maintained and world wide technical support to our Partners and customers for Microbecide® electrostatic sprayers are provided from our manufacturing plant in Singapore. Microbecide® Partners provide world wide sales, training and operational support for Microbecide® Electrostatic Sprayers and PCO Coatings.
To request a demonstration, get a quotation or discuss your requirements contact us at +65 6449 3928 – or contact a Microbecide® Partner in your region today!