Graco Inc 307-434 R N I N G, Never Immerse the Spray GUN in Solvent or, Other Liquid, T E R I a L

W A R N I N G

Before cleaning the gun nozzle or attempting to service	Be sure your installation complies with all applicable
the gun or other components, always turn off the high	local codes.
voltage first, then shut down paint pump and trigger
gun to relieve fluid pressure.	ALWAYS use the lowest pressure possible when
Grounding	flushing and use a grounded metal waste container.
All components of the system, except the gun and paint	When flushing, avoid conductive solvents, if possible.
hoses, must be electrically grounded. Be sure the elec-	Be sure to turn off H.V. Power Supply before flushing,
tric power circuit is properly grounded.	and to remove all solvent from gun before turning on
Be sure your gun is not grounded. Use un$rbunded r	high voltage.
paint hoses to gun only, and be sure your supply pump	Operating
and the object you are painting are-grounded.	Never use or store solvents in the spray area.
All conductive objects within 10 ft (3 m) of the gun must	NEVER IMMERSE THE SPRAY GUN IN SOLVENT OR
be electrically grounded.	OTHER LIQUID.
The object being coated must be grounded.	Keep work hangers and conveyor equipment clean so
	work pieces are well grounded.

How The Elecnostatic Automatic Air Spray Gun Works

A transformer supplies high voltage current through the cable to the gun’s ionizing electrode, where the elec- trostatic field is developed. The pump supplies paint

Be sure your installation complies with Federal, State and local codes for the installation of electrical apparatus in a Class 1, Divisions 1 and 2 Hazardous Location.

The particular type and size system for your operation will have to be custom designed for your needs. For a correctly sized system, contact the Grace Finishing System Division, Franklin Park, Illinois.

Mount the gun on an insulated stationary support or reciprocator arm.

The spray gun has a mounting hole to fit a 0.5 in. (13 mm) diameter rod. Use a mounting fixture which allows adjustment of the spray pattern direction and distance from the work.

Install a normally closed, 3-way air solenoid valve in the cylinder air supply line. BEFORE CONNECTING AIR LINES BLOW THEM OUT TO REMOVE METAL CHIPS AND OTHER FOREIGN PARTICLES. Connect an air

through the hose and gun, where it is electrostatically charged as it passes the ionizing electrode. The charged paint is attracted to the grounded work piece, wrapping around it and coating surfaces indirectly.

hose from the solenoid valve to the gun’s l/4” npt(m) cylinder air inlet. Connect an air supply line to the l/4” npt(m) atomizing air inlet.

BEFORE CONNECTING FLUID LINES, BLOW THEM OUT WITH AIR AND FLUSH WITH SOLVENT. BE SURE THAT THE SOLVENT YOU USE IS COMPATI- BLE WITH THE MATERIAL TO BE SPRAYED.

Connect a fluid hose to the paint supply pump’s outlet and to the gun’s 3/8 npsm fluid inlet.

Install fluid tip in gun. Be sure fluid pressure is relieved and high voltage turned off before installing tip.

Recommended Hose Sizes (General Purpose)

			M A T E R I A L
	O-10 ft (O-3 m)				l/4”	ID
I	lo-35 ft (3-l 1 m)				3/8”	ID	I
	35-100ft ill-30m)				l/2”	ID
	100-200 ft (30-61		m)		3/4”	ID
				AIR
	O-50 ft (O-15 m)				l/4”	ID
I	50-100	ft (15-30	m)		5/16”	ID
	100-200	ft (30-61	m)		3/4”	ID I

Adjust the system’s control device so the gun starts spraying just before the spray meets the workpiece, and stops as soon as it is past.

The gun requires a minimum of 30 psi (2 bar) air pressure to the cylinder.

Fluid Control

Adjust the fluid flow to the proper rate, using a fluid

regulator installed in paint line. It is best to adjust flow rate with a fluid regulator.

Spray Pattern Control

Turn air adjusting screw (36) counterclockwise for a wide flat spray pattern or clockwise to decrease to a round pattern.

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