I.C.T.C. Holdings Corporation 1240 manual Viscosity Chart, NEEDLE, Fluid TIP and AIR CAP Selection

Viscosity Chart

Properties and thickness of coatings vary from one manufacturer to another. The following chart is a guideline only. Use these times as a guideline in determining the appropriate viscosity based on your spraying technique and finish standards. Some high solids coatings may exceed a reasonable viscosity and still be sprayable.

Material To Be Sprayed	Time To First Break In Stream
Acrylic Finishes	10-15 seconds
Acrylic Metallic	10-15 seconds
Acrylic Primer	20-40 seconds
Adhesives	40-60 seconds
Automotive Lacquer	20-30 seconds
Chromates	20-25 seconds
Dyes	10-20 seconds
Enamel	25-50 seconds
Hammer Finishes	30-40 seconds
Hard Gloss Synthetics	30-40 seconds
Imron	30-45 seconds
Lacquer	10-30 seconds
Latex	30-45 seconds
Marine Paint	30-45 seconds
Masonry Paint	30-50 seconds
Oil-bound Heavy-bodied Primers	35-40 seconds
Polyurethane Paint	20-40 seconds
Stains	10-20 seconds
Synthetic & Lacquer Metallic	20-25 seconds
Water Sealer	10-20 seconds

3.3NEEDLE, FLUID TIP AND AIR CAP SELECTION

The proper Needle, Fluid Tip and Air Cap combination is critical to the optimal performance of any spraying system. Needles and Fluid Tips are sized together – when changing the Needle, the Fluid Tip must be changed as well. Air Caps are sized separately and can be changed without necessarily changing the Needle and Fluid Tip. HERO manufacturers seven different sizes of Needles and Fluid Tips ranging from 0.50mm to 3.0mm, and three different sizes of Air Caps.

Identifying Needle, Fluid Tip and Air Cap sizes

The size of a Needle can be determined by the number of annular grooves in the brass sleeve on the Needle. Every wide groove represents one millimeter, every narrow groove represents one-half of a millimeter, i.e.: a Needle with one wide groove and one narrow groove is a 1.5mm Needle; a Needle with two wide grooves is a 2.0mm Needle. The only Needle that differs from this is the 0.75mm, which has no grooves at all.

The size of the Fluid Tip can be determined by placing it on the tip of the Needle. If the tip of the Needle protrudes from the Fluid Tip, they do not match. When the Needle and Fluid Tip match, the Needle will be flush with the end of the Fluid Tip.

HERO Operator’s Manual – Page 7 of 23