The DeVilbiss AGMD PRO Automatic Spray Gun: Precision and Efficiency in Surface Finishing
The **DeVilbiss AGMD PRO** is the answer to the increasing demands for coating quality and process efficiency. As an evolution of the proven AGMD, it combines leading atomization technology with a design focused on maximum maintainability. This practical guide provides you with all the essential details – from technical specifications to effective troubleshooting. Master Class A finishes, optimize your color changes, and reduce downtime.
Product Overview and Technical Data
The AGMD PRO is a versatile automatic spray gun suitable for both **water-based** and **solvent-based** coating materials. It features a simple quick-detach gun head, allowing maintenance exchange in seconds and minimizing production downtime.
Technical Specifications (Excerpt)
| Parameter | Guideline Value |
|---|---|
| Max. Fluid Inlet Pressure | Max. $15\ Bar$ |
| Max. Air Inlet Pressure (Atom/Fan) | Max. $12\ Bar$ |
| Cylinder/Trigger Pressure | $3.5\ to\ 6\ Bar$ |
| Max. Operating Temperature | $40^{\circ}C\ (104^{\circ}F)$ |
| Gun Weight (Base) | $646\ g\ (22.79\ oz)$ |
Materials and Construction
- **Gun Body:** Anodised Aluminium
- **Head:** Stainless steel 303
- **Needle:** Acetal Needle Tip (Standard)
- **Suitable for:** Water-based and solvent-based materials.
- **Caution:** Not designed for highly corrosive/abrasive materials or halogenated hydrocarbon solvents (such as 1,1,1,-Trichloroethane or methylene chloride), as these can react with the aluminium components and lead to an explosion.
Recommended Basic Settings (Guidelines)
Optimal settings depend heavily on the material, viscosity, and the chosen air cap. The following values serve as a starting point for calibration, especially to avoid common spray pattern faults like “Heavy Centre Pattern” or “Split Spray Pattern.”
Settings for Optimal Atomization (Guidelines)
- **Cylinder Air Pressure (Trigger):** $3.5\ to\ 6\ Bar$ (ensures fast trigger cycle).
- **Fan Air Pressure (Atomization):** Start with a medium value. If the spray pattern is too “heavy centre pattern,” increase the Fan Air pressure. If excessively high Fan Air pressure causes a “split spray pattern,” reduce it.
- **Fluid Flow:** For a “split spray pattern” or “starved spray pattern,” increase the Fluid Flow. Check if a larger fluid nozzle size is required.
- **Overspray / Dry Spray:** Both often indicate air pressure is too high or the gun is too far from the work surface. Reduce pressure and adjust target distance.
If you notice an uneven spray pattern (e.g., "Heavy Top" or "Heavy Right Side"), perform a test spray, then rotate the air cap $180^{\circ}$ and spray again. If the defect **inverts**, the obstruction is on the **Air Cap**. If the defect **does not invert**, the problem is on the **Fluid Nozzle**.
Key Maintenance and Safety Aspects
Regular maintenance is crucial for the longevity and consistent performance of the AGMD PRO. Always observe the safety instructions, especially when dealing with solvents and pressures.
Maintenance and Parts Replacement
- **Pressure Relief:** Before any cleaning or maintenance, all pressure must be isolated and relieved from the equipment.
- **Cleaning:** The gun should ideally be cleaned using a gun-washing machine. However, do **not** leave the equipment inside the washer for prolonged periods.
- **Blocked Holes:** Clean horn holes or nozzle obstructions only with a **non-metallic** point.
- **Seals and O-Rings:** If fluid leaks between the Spray Gun and the Intermediate Plate, replace O-Rings (AGMDPRO-29X-K5) or check/replace the Locking Cam (Cam Service Kit AGMDPRO-406-K).
- **Spare Parts:** Use only original or recommended spare parts, as non-recommended parts may create hazards.
Safety Instructions (PPE & Solvents)
- **Respiratory Protection:** Due to toxic vapors, the use of respiratory protective equipment compatible with the material is recommended at all times.
- **Injection Hazard:** Never aim the spray gun at any part of the body. In case of skin injection, seek immediate medical attention and inform the doctor of the material injected.
- **Grounding:** To prevent ignition sources from static discharges, earth continuity must be maintained to the spray gun and other metallic equipment. Conductive air and/or fluid hoses are essential.
FAQ – Frequently Asked Questions about the AGMD PRO
A: This usually indicates a worn packing or fluid needle. Replace the packing or the worn part. If fluid is leaking from the front of the gun, check for foreign matter in the fluid nozzle and clean it.
Q: Which nozzle sizes are available for the Trans-Tech/Compliant technology?
A: The Trans-Tech/Compliant range standardly offers nozzle sizes of $0.85\ mm,\ 1.0\ mm,\ 1.2\ mm$ and $1.4\ mm$.
Q: Can I clean the gun with chlorine-containing solvents?
A: **No**. Halogenated hydrocarbon solvents (such as 1,1,1,-Trichloroethane or methylene chloride) can react with aluminum, which can lead to a violent event (explosion). These solvents are strictly prohibited.
Q: How do I detach a stuck gun from the Intermediate Plate?
A: Ensure the Locking Cam is fully turned to the "Unlock" position. Use a $5\ mm$ key for this.
Q: Which thread connections are used?
A: The fluid inlet and fluid recirculation use $1/8^{\prime\prime}\ BSP$. The air inlets (Atom/Fan) are also $1/8^{\prime\prime}\ BSP$.
Conclusion
The DeVilbiss AGMD PRO automatic spray gun is a high-performance tool designed to meet the production requirements of modern coating processes. Its core advantages lie in rapid maintenance (quick-detach head), suitability for a wide range of materials, and precise atomization technology. By adhering to the specific pressure and material guidelines and the strict safety regulations (no chlorine-containing solvents!), you ensure maximum lifespan and consistently high coating quality.
