Operation

WARNING

To reduce the risk of component rupture, which can cause a fire or explosion and result in serious bodily injury, including splashing in the eyes, never exceed 250 psi (18 bar, 1.8 MPa) Maximum Inbound Fluid Pressure to this regula- tor.

CAUTION

Do not pressure test the regulator with air; use solvent. Air may cause leaks between the fluid seals and result in fluid leaks during normal operation.

If the rest of the system must be pressure tested with air, loop past the regulator during the test.

1.Insert hex end of key (25) in adjusting screw (20) and turn counterclockwise until spring tension is relieved. See Figs 2 and 3.

2.Start pump and open shutoff valve of outlet (H) to admit fluid to regulator. Turn key (25) clockwise until desired fluid pressure shows on gauge.

CAUTION

Do not exceed the Regulated Pressure specification of your regulator. Pressures higher than specified can damage the gauge.

CLEANING THE REGULATOR

Note: Flush the regulator every four weeks, or as necessary for the amount and type of use.

1.Clear regulator of paint or other fluid by blowing back fluid through the gun and hose.

2.Shut off supply pump and relieve line pressure by opening back pressure regulator or other by-pass valve.

3.Open regulator valve by screwing the threaded portion of key (25) as far as possible into the cap. See Fig. 2.

4.Loosen air cap ring of spray gun three turns, hold a rag firmly over the end of the cap and trigger the gun. Air will force fluid back through the gun, hose and regulator.

5.After blow-back, remove the adjusting key (25)

Note: Do not use the threaded end of key (25) to adjust pressure.

6.Flush regulator until clean. 25

Blow Back Position

Regulating Position

Note: When reducing pressure, relieve pressure in gun and supply line to ensure a correct gauge reading.

Fig. 2

03369

6306563

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Graco 204500, 204501, 203831 important safety instructions Operation, Cleaning the Regulator
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204500, 204501, 203831 specifications

Graco is renowned for its expertise in manufacturing reliable and innovative products for various applications, particularly in the fields of paint sprayers and fluid management systems. Three notable products that stand out in their lineup are the Graco 203831, 204501, and 204500. Each model has unique features and characteristics that cater to different user needs and preferences.

The Graco 203831 is specifically designed for users who require a robust and portable sprayer capable of handling multiple painting surfaces. This model features the ProSpray technology, which ensures a fine finish with minimal overspray, making it perfect for detailed work. The 203831 is equipped with a powerful electric motor that delivers consistent pressure, enabling faster and more efficient painting. Its lightweight design enhances mobility, promoting ease of use for both professionals and DIY enthusiasts. Additionally, this model includes adjustable pressure settings, allowing users to tailor the paint flow to suit different materials and project requirements.

In contrast, the Graco 204501 focuses on enhanced productivity and versatility. This airless sprayer is ideal for larger projects where time efficiency is crucial. It features adjustable spray patterns, which enable users to switch from wide to narrow patterns with ease. The 204501 also comes equipped with a high-capacity paint bucket, allowing for extended operation without frequent refills. As with the 203831, it employs advanced ProConnect technology that facilitates easy repairs and maintenance, ensuring that users can quickly get back to work with minimal downtime.

Finally, the Graco 204500 is a powerhouse meant for industrial applications. This model boasts an impressive flow rate, allowing it to tackle heavy-duty tasks with ease. Its robust build and durability make it suitable for continuous use in demanding environments. The 204500 incorporates cutting-edge FastRx technology, which aids in quick material priming and recovery, thereby reducing material waste. Additionally, this unit allows for remote control operation, providing greater flexibility and convenience during use.

In summary, Graco's 203831, 204501, and 204500 represent a fusion of technological innovation and user-centric features. Each model caters to specific needs, whether it’s portability, versatility for larger jobs, or industrial strength. With Graco, users can expect reliable performance and exceptional finish quality in their painting endeavors.
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