Graco Inc 309475F Operation, Mechanical Regulator, Pneumatic Regulator, Flush Before First Use

Operation

Flush Before First Use

Your pressure regulator has been tested in the factory with an anti-corrosion liquid. Before using the regulator, thoroughly flush the system with a solvent to remove residue of this liquid as well as any contaminants that have been introduced during assembly of the system.

Pressure Relief Procedure

WARNING

The system pressure must be manually relieved to prevent the system from starting or spraying acciden- tally. To reduce the risk of an injury from accidental spray from the gun, splashing fluid, or moving parts, follow the Pressure Relief Procedure whenever you:

•are instructed to relieve the pressure

•stop spraying

•check or service any of the system equipment

•or install or clean the spray tip.

1.Lock the gun trigger safety.

2.Close the bleed-type master air valve (required in your system).

3.Unlock the gun trigger safety.

4.Hold a metal part of the gun firmly to the side of a grounded metal pail and trigger the gun to relieve pressure.

5.Lock the gun trigger safety.

6.Open the drain valve (required on your system), with a container ready to catch the drainage.

7.Leave the drain valve open until you are ready to spray again.

If you suspect that the spray tip or hose is completely clogged or that pressure has not been fully relieved after performing steps 1 through 7, very slowly loosen the tip guard retaining nut or hose end coupling and relieve pressure gradually. Then loosen completely and clear the tip or hose.

Operation

Adjusting the Regulator

The fluid pressure regulator controls pressure down- stream from its outlet. The inlet fluid pressure should always be higher than the outlet fluid pressure.

If you are using an accessory fluid pressure gauge, trig- ger the spray gun to relieve pressure in the line when reducing the pressure, to ensure a correct gauge read- ing.

Adjust the pump air pressure and the fluid pressure reg- ulator for the best spraying combination.

In a circulating system, the back pressure valve controls the fluid pressure upstream of its inlet in the same way.

Mechanical Regulator

1.Back out the knob until there is no spring pressure.

2.Turn on the fluid supply, to admit fluid to the regula- tor.

3.Turn the knob clockwise to adjust fluid pressure to the desired level.

Pneumatic Regulator

1.With the fluid supply shut off, turn on the air pres- sure to the regulator.

2.Turn on the fluid supply, to admit fluid to the regula- tor.

3.Increase the fluid inlet pressure. When the fluid out- let pressure is at the desired level, shut off the air to the fluid regulator.

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