Integrated Flow Control

Fluid and Air Pressure

Requirements

The fluid input pressure to the fluid regulator must be high enough to provide a 15-20 psi (0.1-0.14 MPa,

1.0-1.4 bar) pressure differential across the regulator at the highest flow setting. For example, if the maximum flow rate set point is 280 cc/min and 35 psi outlet pres- sure is required to achieve that flow, the input pressure must be 50-55 psi.

Required air pressure to the flow control module is 70-100 psi (0.35-0.7 MPa, 3.5-7.0 bar).

NOTE:

•For flow control modules 249849 and 24H989 used with a 1:1 fluid regulator, the fluid outlet pressure from the regulator must be between 12-75 psi

(.08-0.5 MPa, 0.84-5.2 bar) for all flow set points. Flow rate set points with pressures outside this range are not achievable. There must be at least 12 psi (.08 MPa, 0.84 bar) fluid pressure at the lowest flow rate.

•If flow control module 24H989 is used with a fluid regulator at a ratio greater than 1:1, the relationship of air pressure to fluid outlet pressure is very impor- tant. The lowest recommended air pressure from the V/P is 10-12 psi (.07-.08 MPa, 0.70-0.84 bar). Back pressure will be required to ensure minimal fluid pressure at the lowest flow rate setpoint.

The turn down ratio of the typical fluid regulator is approximately 3:1 or 4:1, depending on material type and viscosity. For example, if the lowest flow rate required is 100 cc/min, the top flow rate achievable may be 300-400 cc/min.

NOTE: The top flow rate is not the maximum flow rate range selected.

Flow Control Operation

See FIG. 73 for module 249849 and FIG. 74 for module 24H989. The Flow Control System includes two infor- mation loops:

•The pressure loop monitors fluid pressure with the pressure sensor in the module. This allows the sys- tem to react very quickly to set point changes. The gun must be triggered during the pressure loop.

•The flow loop monitors fluid flow through flow meter pulses, ensuring accuracy. The gun must be triggered during the flow loop.

The Flow Control System creates a data table that tar- gets a desired flow rate based on the fluid pressure. It then monitors the flow loop to maintain the flow rate.

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Graco TI12552a, TI12553a important safety instructions Fluid and Air Pressure Requirements, Flow Control Operation
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TI12553a, TI12552a specifications

The Graco TI12552A and TI12553A are highly regarded models in the realm of airless paint sprayers, designed to cater to both professional contractors and DIY enthusiasts. These sprayers are engineered for efficiency and versatility, making them ideal for a variety of painting tasks, including interior and exterior applications.

One of the standout features of the Graco TI12552A and TI12553A is their powerful motor, which delivers consistent pressure for a flawless finish. The motor is backed by a robust design, ensuring durability even during extensive use. This enables users to spray unthinned coatings, making the models suitable for a range of materials, including latex, stains, and sealers.

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The ergonomics of these sprayers are commendable, with comfortable grips and well-placed controls, allowing for extended use without discomfort. Additionally, the integrated storage compartments enable users to keep accessories like sprayer tips and hoses organized and easily accessible.

Another significant characteristic of the TI12552A and TI12553A is their adjustable pressure control. This allows users to tailor the paint flow to suit specific projects, providing greater control over the application and ensuring optimal results. The models also feature a reversible spray tip, which is a convenient addition that allows for easy unclogging, minimizing interruptions during work.

For safety and maintenance, both models come equipped with a built-in suction filter that prevents debris from entering the system and damaging the pump. Regular maintenance is simplified by the easy-access fluid intake, which allows for straightforward cleaning.

In summary, the Graco TI12552A and TI12553A are advanced airless paint sprayers that combine power, convenience, and versatility. With their user-friendly features, ergonomic design, and innovative technologies, these sprayers are essential tools for anyone looking to achieve professional-quality finishes with ease. Whether it’s a residential project or larger-scale commercial job, the TI12552A and TI12553A stand out as reliable choices in the competitive landscape of paint sprayers.
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