HVLP and RP compared: which spraying method is right?
Discover the differences between High Volume Low Pressure and Reduced Pressure and learn how these atomization techniques deliver a perfect paint result.
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€692.29*
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€692.29*
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Pressure-assisted gravity spray guns – consistent feed for perfect surfaces
Pressure-assisted gravity spray guns (also pressure-cup guns or pressure-assisted gravity guns) combine the precise delivery of classic gravity guns with slight overpressure in the cup. This keeps material flow constant – even with thick or highly viscous paints. The result is a uniform, finely atomized spray pattern with excellent leveling and high process reliability. Ideal for demanding clear coats, stains, 2K coatings, or opaque wood and metal finishes.
HVLP, RP or pressure-assisted – which technology fits?
HVLP (High Volume Low Pressure) minimizes overspray and is ideal for fine finishing and precise edges. RP (Reduced Pressure) offers more throughput and speed on larger areas. Pressure-assisted gravity guns combine both: stable feed, clean pattern and high efficiency – especially with thicker materials or long passes. Choose based on viscosity, part size and the finish you want.
Nozzle sizes & applications
For base and clear coats, we recommend 1.2–1.4 mm nozzles; for fillers, primers and high-viscosity coatings, 1.6–1.8 mm (up to 2.0 mm for high-solids systems). Match nozzle, air cap and cup pressure precisely to viscosity and manufacturer guidance – this ensures optimal coverage, flow and gloss.
Compressor, air demand & cup pressure
A pressure-assisted gravity gun needs a stable airflow and steady material pressure. Your compressor should provide an effective output of at least 220–320 l/min and allow an inlet pressure of around 2.0 bar. Cup pressure is typically 0.2–0.7 bar – depending on material and nozzle size. Clean, dry air with water/oil separation is essential to avoid defects and surface disturbances.
Maintenance, cup systems & accessories
Regular cleaning of nozzle, needle and air cap is crucial for consistent quality. After each use, release cup pressure and flush the gun thoroughly. For frequent color changes, disposable cup systems are especially practical. Instead of fine inline cup filters that clog quickly, we recommend card filters during filling for reliable filtration. Matching nozzles,air caps and further accessories can be found in the accessories section.
Top brands for pressure-assisted gravity spray guns
- SATA – German precision “Made in Kornwestheim.” SATA stands for durable quality, fine atomization and ergonomic handling. The SATAjet X series uses a special labyrinth air system for an exceptionally even spray pattern.
- DeVilbiss – Part of Carlisle Fluid Technologies. The Advance HD series offers precision stainless-steel nozzles, Trans-Tech® air caps and variants for solvent- and water-borne paints – perfect for fine finishing.
- Anest Iwata – Japanese precision with finest manufacturing tolerances. Ideal for high-gloss finish and precise applications in automotive and wood coating.
- Wagner – Innovative spray technologies focused on energy efficiency and uniform paint distribution for crafts and industry.
- Graco – Industrial spraying technology for continuous operation, robust construction, reliable pressure control and long-life components.
- Beschichtpunkt – Specialist for application technology and gravity spray guns focused on precise atomization, ergonomics and high surface quality.
- Sames (formerly KREMLIN) – Industrial HVLP/RP air caps (e.g., FPro family); as a pressure-assisted gravity solution for constant feed with viscous media.
- Binks – Broad portfolio of gravity-feed/pressure-feed guns; in pressure-assist configurations for robust process reliability.
- Krautzberger – German craft quality, precise nozzle/air-cap combinations; with cup pressure as a pressure-assisted solution for series finishing.
- Walther Pilot – Pilot series for hand and industrial use; pressure-assisted gravity for even feed and repeatable results.
- SAGOLA –Automotive and wood finishing; HVLP/RP air caps combined with cup pressure as a pressure-assist setup with fine spray pattern.
- Dürr – EcoGun solutions for high-viscosity materials; pressure-assisted gravity-cup for precise dosing and minimized pulsation.
- Prevost – HVLP gravity guns; in pressure-assist configurations for stable atomization with varying viscosity.
- Colad – Painting supplies, masking materials & mixing systems for efficient coating processes.
- Elcometer – Precise measuring & test technology for film thickness, adhesion, climate & surface preparation.
- Mirka – Abrasives, polishing systems & dust extraction for perfect surface preparation.
- Ransburg – Electrostatic spray guns & systems for efficient, material-saving coating.
All models are available from stock and can be configured with matching accessories, nozzle sets and cup systems. Request advice now or Buy pressure-assisted gravity spray guns online.
Guides & resources
SATAminijet 4400 B: HVLP vs. RP – practical comparison
Concrete reference values for pressure, air consumption & spray distance plus a decision aid for your scenario.
Learn moreCommon spray gun mistakes and how to fix them
This article explains the most common causes of issues, shows solutions and gives tips for prevention.
Learn moreFrequently asked questions about pressure-assisted gravity spray guns
What is a pressure-assisted gravity spray gun and when should I use it?
A pressure-assisted gravity gun uses slight overpressure in the cup to stabilize material flow. It is ideal for high-viscosity materials, larger areas and consistent film builds – while delivering very good surface quality and reduced overspray.
HVLP, RP or pressure-assisted – which is better for my application?
HVLP minimizes overspray for fine finishing, RP delivers high output with very good quality. Pressure-assisted combines steady flow with efficient atomization – especially advantageous for thicker media or long spray passes. Decide based on viscosity, part size and desired cycle time.
Which nozzle size for pressure-assisted gravity guns?
Base & clear coats: 1.2–1.4 mm; fillers/primers: 1.6–1.8 (up to 2.0) mm. For very viscous materials, select a larger nozzle if needed. Always verify against the coating and gun manufacturer’s specs.
What cup pressure (material pressure) is recommended?
Typically 0.2–0.7 bar cup pressure, depending on viscosity and nozzle size. Start low (e.g., 0.2–0.3 bar) and increase in small steps until you reach a stable, pulse-free flow without bubbles.
Customer reviews
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