Spray Techniques
System Adjustment
| A | A |
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| ti4004a |
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| ti3999a |
ti4000a |
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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 | |
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| to prevent material from backing up |
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| needle |
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| B |
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| C |
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| ti4338a |
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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. |
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| 16. |
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| If flow adjustment nut will not |
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• | More air produces a finer finish, | turn, check to see if it is: |
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| less air a coarser finish. | • set to maximum adjustment, or |
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| • if there is material on threads. |
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| Clean threads as needed. |
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309915D | 17 |