![]() ![]() ![]() With the same amount of air being pushed into the booth, but now a lower CFM being pulled through clogged air filters, the booth is over-pressurized. As the filters fill up with over-spray, the exhaust fan must work harder to remove the air through those filters and out of the booth. How do you know if you need makeup air?įull Filters: Paint Booth air flow is affected when the exhaust filters become full with over-spray. The Sure-Cure AMU from Standard Tools and Equipment allows you to adjust temperatures, times and booth pressure by means of the energy-saving variable frequency drive contained in the control panel. Positive pressure creates a cleaner booth.īeing able to control the airflow changes the way you paint. When there is more air being pushed in than sucked out, you create positive pressure, so a slight amount of air is pushed out when the booth door is open. If the painter opens the booth door, the pressure goes negative and sucks in dirt and contamination thru the open door, and all the other cracks and crevices of the booth. When a booth is balanced, it means that the same amount of air is pushed in and pulled out (8,000 CFMs exhausted out and 8,000 CFMs pushed in through the AMU). The fan that PUSHES the air into the booth through the Sure-Cure AMU is a blower fan, designed to force the air into the booth.Ĭontrolling the air flow and pressure is a delicate balance between input air and exhausted air. ![]() Aluminum blades are used because they will not spark, causing a fire, which is important when working with flammable coatings. Tube-axial is the best fan to be used on the exhaust of the booth because they are designed to pull the air. ![]() The exhaust fan that PULLS the air out of the Standard Tool’s paint booths is a tube-axial exhaust fan. The air being pushed in and pulled out are done with two types of fans. THINK STANDING IN FRONT OF A FAN.Ĭontrolling the paint booth air flow going into the booth, with relation to the air being exhausted from the booth, is critically important to maintain the proper flow of air over the item being painted and remove the over-spray effectively. In this case, the booth has more air than outside the booth and when a door is opened, dirt and debris is pushed away from the booth. If the AMU is designed to force more air into the booth than is exhausted…the booth is said to have “positive” air pressure. To counter this “negative” pressure, an Air Makeup Unit (AMU) unit is used to supply air to replace the air being exhausted. When there is a negative air pressure, the booth will try to suck in as much air as possible, including dirt and debris from outside the booth. When the exhaust fan of the booth is turned on, it creates a “negative” air pressure in the booth cabin (taking out more air than is being put in). Why would you need to push air into your booth? With the Sure-Cure Air Makeup Unit, you control the amount of air pushed into your booth. Airflow while spraying takes the over-spray away from the paint job and out of the booth.Īir in – Air out. How much air in being put into the booth and how much is being taken out. These volumes must be replenished with equal volumes of air coming into the booth.ĪIR MAKE-UP (AMU) is defined as…a mechanical means of replacing air that has been exhausted out of the booth. During spray jobs in a paint booth, the exhaust system must draw substantial quantities of air out of the shop in order to operate. ![]()
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