Apollo Standard "D" Cap for 7500 & 7700 Series Spray Guns

Apollo Standard “D” Cap for the Apollo 7500 & 7700 Series Spray Guns

The Apollo Standard “D” Cap for the Apollo 7500 Series Spray Guns and Apollo 7700 Series Spray Guns is a fluid/air cap designed for the highest material flow in the standard cap lineup.

Here’s a clear breakdown of what it is and what it does:

What it is

• A “D” size standard air cap (not high-solids unless specified as HS)
• Used on Apollo HVLP turbine spray guns in the 7500 and 7700 series
• Typically paired with a 2.5 mm needle/nozzle set

What it’s used for

The “D” cap is the heaviest-output standard cap, meaning it’s built for thicker coatings and high-flow spraying, such as:

• Thinned latex paints
• Heavy primers
• High-viscosity enamels
• Some solvent-based adhesives or coatings

Key performance characteristics

• Largest fluid delivery in the standard cap lineup
• Designed to atomize thicker materials without excessive thinning
• Produces a wide, wet spray pattern
• Optimized for fast coverage on large surfaces

Compatibility note

• Standard “D” cap ≠ High Solids (HS) “D” cap (HS version is for even thicker materials)
• Works across both 7500 and 7700 Apollo turbine guns as long as needle/nozzle match

If the smaller caps are for fine finishes, the “D” cap is the “heavy hitter”—it’s what you use when you want to push more material quickly and you’re spraying something too thick for the smaller caps to handle efficiently.