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Spray Machines Guns and Tips Charts

Different spray machines require different types of guns and tips to achieve correct flow and spray pattern. If the incorrect setup is used it is possible to cause damage to the spray machine and the coating operator.

Selection of the correct tip is critical to achieving maximum productivity. This is due to the fact that the tip determines the fluid flow and the size of the spray pattern (fan size) of the coating. The correct tip produces improved results with the maximum control and minimum over spray, optimizing work times and causing less paint waste.

graco spray tips guards guns hoses

Choosing the right tip.

To choose the right spray tip, requires the consideration of several key factors, such as the material thickness, the sprayer’s maximum flow rate and the best fan size for the project. Being able to identify when a tip is worn and replacing the tip at the right time will also improve the finish quality and project devleoment time.

For optimum performance, the sprayer must have a maximum flow rate higher than the flow rate of the tip, to be sure the flow rate of the tip is less than the maximum flow rate of the sprayer unit.

Why use a tip with a lower flow rate?

The tip slowly wears and the orifice becomes larger, resulting in an increase of coating flowing throught the tip and onto the work area. This can lead to an uneven coating of the surface and excess usage of coating material which adds to the overal project cost.

Why is spray pattern fan width also required?

The width of the spray pattern, known as the fan width, determines the area covered with each pass. For a given tip orifice, a wider fan delivers a thinner coat, less defined spray pattern, more over spray and faster coverage on broad, open surfaces. A narrower fan delivers a thicker coat, more defined spray pattern, less over spray and better control when spraying small or confined surfaces.

To maximize productivity and lower labor costs, choose a tip with the right fan size. In general, a spray tip with a larger fan size increases production with less control, and a smaller fan size decreases production with more control.

Selecting the correct gun for coating application

There are a wide variety of spray tips available for use in electrostatic coating. The type of tip used will depend on the shape of the work piece to be painted and the consistency of the paint. The object is then heated, and the powder melts into a uniform film, and is then cooled to form a hard coating. It is also common to heat the metal first and then spray the powder onto the hot substrate. Preheating can help to achieve a more uniform finish but can also create other problems, such as runs caused by excess powder.

Another type of gun is called a tribo gun, which charges the powder by (triboelectric) friction. In this case, the powder picks up a positive charge while rubbing along the wall of a Teflon tube inside the barrel of the gun. These charged powder particles then adhere to the grounded substrate. Using a tribo gun requires a different formulation of powder than the more common corona guns. Tribo guns are not subject to some of the problems associated with corona guns, however, such as back ionisation and the Faraday cage effect.

Recommended tip sizes for common coatings.

Filter Screen Typical Product Typical tip size
#30 Hi-build epoxy and high solid coatings. 25,000 +
#60 General industrial coatings. 17,000 to 23,000
#100 Decorative industrial top coats. 11,000 to 16,000
#200 Superfine finish top coats. 7,000 to 12,000

Tip Selection Charts

Get help with selecting the right tips by reviewing charts based on the most common brands.

Graco RAC-5 Airless Spray Tips

Tip Model: 286

This is a general guideline to help you select a tip. BlastOne as a Graco distributor can recommend a tip based on experience with any application project, or assist in the conduction of test to find the best product.

Tips size selection chart

Orifice Size Fan Width
Imperial (In.) 2-4 4-6 6-8 8-10 10-12 12-14 14-16 16-18 18-20 Flow Rate (gpm) Flow Rate (Ipm)
Metric (mm) 51-102 102-152 152-203 203-254 254-305 305-356 356-406 406-457 457-508
.007 207 307 .05 .20
.009 109 209 309 409 509 609 .09 .33
.011 111 211 311 411 511 611 .12 .49
.013 113 213 313 413 513 613 .18 .69
.015 115 215 315 415 515 615 815 .24 .91
.017 217 317 417 517 617 817 917 .31 1.17
.019 119 219 319 419 519 619 819 .38 1.47
.021 121 221 321 421 521 621 721 821 .47 1.79
.023 223 323 423 523 623 723 .57 2.15
.025 225 325 425 525 625 725 .67 2.54
.027 327 427 527 627 827 .77 2.96
.029 429 529 629 729 .90 3.42
.031 331 531 631 831 1.03 3.90
.033 433 533 633 833 1.17 4.42
.035 235 435 535 635 735 835 935 1.31 4.98
.039 439 1.63 6.18
.043 443 543 1.98 7.51
.045 645 2.17 8.23
.051 451 551 2.79 10.57
.055 455 555 655 3.25 12.29
.063 563 4.26 16.13
.065 665 4.53 17.17

Graco XHD Tip Selection

Tip models: XHD

Tips size selection chart

Orifice Size (Inches) Fan width
Imperial (In.) 2-4 4-6 6-8 8-10 10-12 12-14 14-16 16-18 18-20 Flow rate (gpm) Flow rate (ipm)
Metric (mm) 51-102 102-152 152-203 203-254 254-305 305-356 356-406 406-457 457-508
.007 107 307 .05 .20
.009 109 209 309 409 509 609 .09 .33
.011 111 211 311 411 511 611 711 .12 .49
.013 113 213 313 431 513 613 713 813 .18 .69
.015 115 215 315 415 515 615 715 815 .24 .91
.017 117 217 317 417 517 617 717 817 .31 1.17
.019 119 219 319 419 519 619 719 819 .38 1.47
.021 121 221 321 421 521 621 721 821 .47 1.79
.023 323 423 523 623 723 823 923 .57 2.15
.025 225 325 425 525 625 725 825 .67 2.54
.027 227 327 427 527 627 727 827 927 .74 2.96
.029 229 329 429 529 629 729 829 .90 3.42
.031 231 331 431 531 631 731 831 931 1.03 3.90
.033 333 433 533 633 733 833 933 1.17 4.42
.035 235 335 435 535 635 735 835 935 1.31 4.98
.037 337 437 537 637 737 837 937 1.47 5.56
.039 139 239 339 439 539 639 739 839 939 1.63 6.18
.041 341 441 541 641 741 841 1.8 6.83
.043 343 443 543 643 743 843 1.98 7.51
.045 345 445 545 645 2.17 8.23
.047 347 447 547 647 747 847 2.37 8.98
.049 449 549 649 749 2.58 9.76
.051 351 451 551 651 751 851 2.79 10.57
.053 553 753 4.26 16.13
.055 355 455 555 655 755 855 3.25 12.29
.057 557 657 3.49 13.20
.059 459 659 3.74 14.14
.061 461 561 761 861 4.0 15.12
.065 465 565 665 4.53 17.17
.067 467 567 667 767 867 4.82 18.24
.069 669 5.11 19.34
.071 471 571 671 771 5.41 20.48
.075 475 574 675 6.04 22.85
.081 481 7.04 26.66

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