Graco Inc 313516C Proper Needle/Nozzle Selection, Air Caps, Conventional Guns

Selection Charts

Conventional Guns

An airspray gun has excellent atomization and high production rates typically with some reduction in transfer efficiency.

Proper Needle/Nozzle Selection

The spray gun's needle/nozzle kits range in size to provide different fluid flow rates. As a general guideline, use the fluid nozzle that will give the required flow with the needle fully trig- gered at a fluid pressure of 5–20 psi (0.035–0.14 MPa, 0.35–1.4 bar).

•For low flow rates or light viscosity fluid, select the smaller nozzle sizes.

•For high flow rates or high viscosity fluid, select the larger nozzle sizes.

•For abrasive fluids, the high wear gun mod- els are recommended.

Air Caps

				Atomizing Air	Fan Air
Air Cap			Nozzle	Max. HVLP/Compliant	Max. HVLP/Compliant
Part			Orifice	Manifold Inlet Pressure	Manifold Inlet Pressure
No.	Type	Application	in. (mm)	psi (MPa, bar)	psi (MPa, bar)
			0.020–0.055
289773	Conventional	General Metal	(0.5–1.4)	N/A	N/A
289784	Conventional	General Metal	0.070 (1.8)	N/A	N/A
			0.020–0.070
289041	HVLP	General Metal	(0.5–1.8)	17 (0.12, 1.2)	29 (0.20, 2.0)
			0.020–0.070
289042	Compliant	General Metal	(0.5–1.8)	29 (0.20, 2.0)	33 (0.23, 2.3)
288861	Conventional	High Wear	0.059 (1.5)	N/A	N/A
			0.070–0.086
289049	Conventional	High Wear	(1.8–2.2)	N/A	N/A
289115	HVLP	High Wear	0.059 (1.5)	18 (0.12, 1.2)	28 (0.19, 1.9)
289325	HVLP	High Wear	0.070 (1.8)	18 (0.12, 1.2)	27 (0.19, 1.9)
289050	Compliant	High Wear	0.059 (1.5)	28 (0.19, 1.9)	31 (0.21, 2.1)
289327	Compliant	High Wear	0.070 (1.8)	29 (0.20, 2.0)	32 (0.22, 2.2)
			0.030–0.040
288862	Conventional	Wood	(0.8–1.0)	N/A	N/A
			0.030–0.040
288864	HVLP	Wood	(0.8–1.0)	24 (0.17, 1.7)	26 (0.18, 1.8)
			0.030–0.040
288863	Compliant	Wood	(0.8–1.0)	27 (0.19, 1.9)	42 (0.29, 2.9)

313516C 7