Spray Techniques

System Adjustment

 

A

A

 

 

 

ti4004a

 

 

 

ti3999a

ti4000a

 

 

1 Open air valve (A).

2 Test spray pattern on card-

3 Adjust air valve (A) to achieve

 

board. Hold gun 18 to 30 in.

uniform, round spray pattern. It

 

(457 to 762 mm) from surface.

may be necessary to change

 

Use this spray distance for

spray nozzle to achieve

 

most applications. Overlap

desired spray pattern.

 

each stroke 50% in a circular

NOTE: Keep a small amount of air

 

motion.

 

flowing through air line and gun tip

 

 

 

 

to prevent material from backing up

 

 

needle

 

 

B

 

 

 

C

 

 

 

ti4338a

 

4

To select correct nozzle for

When adjusting flow adjustment

Check material consistency

 

your applications, consider

nut (B), release trigger (C), then

often. Material may thicken as it

 

size of aggregate in material

adjust.

sits and slow down production or

 

and coarseness of spray pat-

 

affect spray pattern. Thin with

 

tern. Remember the larger the

If adjusting while triggered,

water as needed to maintain

 

nozzle, the larger the pattern.

needle will turn but provide no

proper consistency.

 

See Nozzle Selection, page

adjustment.

 

 

16.

 

 

 

 

If flow adjustment nut will not

 

More air produces a finer finish,

turn, check to see if it is:

 

 

less air a coarser finish.

• set to maximum adjustment, or

 

 

 

if there is material on threads.

 

 

 

Clean threads as needed.

 

309915D

17

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Image 17
Graco Inc 248084, 248082, 248083 manual System Adjustment, See Nozzle Selection, Adjustment If flow adjustment nut will not