Spray Painting Compressors – A Complete Guide
Spray painting compressors are essential for achieving smooth, professional-quality finishes on various projects. Whether you’re a professional or a DIY enthusiast, understanding how to choose, set up, and maintain your compressor can make a huge difference in your work.
In this guide, I’ll walk you through everything you need to know about spray painting compressors, helping you make the best choice for your projects.
What is a Spray Painting Compressor?
A spray painting compressor supplies air to spray guns, allowing you to paint surfaces efficiently. It compresses air and directs it through hoses to the spray gun, which atomises the paint into a fine mist for even coverage.
The compressor’s size, power, and airflow capacity are key factors in its performance, and understanding these elements will help you select the right one for your needs.
Types of Spray Painting Compressors
There are several types of spray painting compressors suited for different tasks:
- HVLP Compressors (High Volume, Low Pressure): These are ideal for fine finishes and delicate jobs. They deliver a large volume of air at low pressure, reducing overspray and waste.
- LVLP Compressors (Low Volume, Low Pressure): LVLP compressors are perfect for smaller, more detailed jobs. They use less air, which is ideal for precision work.
- Portable Compressors: These are compact and lightweight, making them ideal for DIY projects. While they may not have the power for larger tasks, they’re convenient for smaller jobs.
- Stationary Compressors: Larger and more powerful, stationary compressors are suited for heavy-duty, commercial, or industrial jobs where consistent, high air pressure is required.
Recommended Paint Spraying Compressors
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Air Compressors, Industrial Electric Air Compressors
18CFM 200L 4HP Clarke 230V Industrial Piston Compressor – 5016086244615
Original price was: £965.95.£918.20Current price is: £918.20.- 4HP motor: Provides powerful performance with 18 cfm airflow, perfect for handling demanding industrial tasks.
- 200-litre tank: Features a large capacity for extended operation without frequent refills, supporting high-volume use.
- Reliable build: Designed for long-term use, with solid construction that ensures durability in busy industrial environments.
- Efficient design: Built for optimal performance and energy efficiency, ideal for continuous use in workshops.
- Part number: 2092290.
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Air Compressors, Industrial Electric Air Compressors
28CFM 270L 2x3HP Clarke Industrial Air Compressor 230V – 5016086244646
Original price was: £1,795.95.£1,676.20Current price is: £1,676.20.- 28cfm air output: Dual pumps and motors deliver up to 28cfm, providing powerful performance for demanding applications.
- 270-litre tank: Features a large capacity for handling high-volume compressed air needs, reducing downtime for refills.
- Single-phase compatible: Designed for 230V power supply, making it ideal for commercial and industrial settings with standard electrical setups.
- Reliable construction: Built with essential safety and operational features, ensuring consistent and dependable performance over time.
- Part number: 2092350.
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Air Compressors, Industrial Electric Air Compressors
36CFM 270L 8HP Clarke Electric Oil-Lubricated Industrial Air Compressor – 2092370
Original price was: £1,925.95.£1,798.60Current price is: £1,798.60.- 36cfm airflow capacity: Ideal for professional spray guns and air tools, ensuring consistent and high-quality output.
- 4HP twin compressor pumps: Increases performance and reliability, allowing for efficient and continuous operation.
- Heavy-duty construction: Ensures durability and long-term performance even in the most demanding environments.
- Single-phase power supply: Suitable for environments limited to a 230V, single-phase power supply, offering versatility in various locations.
- Part number: 2092370.
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Air Compressors, Industrial Electric Air Compressors
30CFM 200L 7.5HP Clarke 400V Industrial Piston Compressor – 5016086254379
Original price was: £1,465.95.£1,396.32Current price is: £1,396.32.- 7.5HP motor: Delivers powerful performance, ideal for demanding applications and continuous operation.
- Industrial-grade design: Built in the UK for commercial and industrial use, ensuring high-quality performance and longevity.
- Slow-running ‘V’ belt drive: Ensures long-term reliability and low maintenance, providing durability for extended use.
- Reliable performance: Engineered to provide dependable service, even in challenging environments and demanding conditions.
- Part number: 2092360.
How to Choose the Right Spray Painting Compressor
To get a smooth, even finish, you need the right CFM (Cubic Feet per Minute), PSI (Pounds per Square Inch), and tank size.
CFM (Cubic Feet per Minute) and Why It Matters
CFM measures the airflow delivered by your compressor. If it’s too low, your spray gun will sputter, causing uneven coverage. Different painting tasks require different CFM levels.
| Spray Gun Type | CFM Requirement | Best For |
| HVLP (High Volume, Low Pressure) | 8 – 20 CFM | Automotive painting, furniture refinishing |
| LVLP (Low Volume, Low Pressure) | 3 – 8 CFM | Small DIY projects, touch-ups |
| Conventional Spray Guns | 8 – 20+ CFM | General-purpose painting, industrial use |
PSI (Pounds per Square Inch) and Spray Gun Performance
PSI determines air pressure. Most spray guns need 20-30 PSI, while HVLP guns require lower PSI to reduce overspray. Your compressor should provide a higher max PSI than your gun requires to maintain stable pressure.
| Spray Gun Type | Ideal PSI Range | Notes |
| HVLP Guns | 20 – 30 PSI | Low pressure reduces overspray |
| LVLP Guns | 10 – 20 PSI | Great for small compressors and DIY |
| Conventional Spray Guns | 30 – 50 PSI | Faster coverage for general painting |
Tank Size and Airflow Consistency
Tank size affects how long you can spray before refilling. Small DIY projects need 24-50L, mid-sized projects 50-100L, and professional jobs 100L+ for uninterrupted spraying.
| Tank Size | Suitable For | Best Use |
| 6 – 24 Litres | Airbrushing, hobbyist use | Portable but limited continuous spraying |
| 25 – 50 Litres | Furniture, DIY projects | Allows longer spraying with some pauses |
| 50 – 100 Litres | Automotive painting | Continuous spraying for medium-sized projects |
| 100+ Litres | Commercial painting | Minimal downtime, ideal for professionals |
No, but it helps maintain steady airflow, reducing pressure drops and interruptions.
Setting Up Your Spray Painting Compressor
Setting up your spray painting compressor is straightforward if you follow these steps:
- Choose a Well-Ventilated Area: Ensure proper ventilation to avoid inhaling fumes.
- Connect the Hose: Attach the air hose securely to both the compressor and the spray gun.
- Adjust the Pressure: Set the PSI to the recommended level for your spray gun.
- Test the Setup: Before starting your project, do a test spray on a scrap piece of material. This helps ensure everything is working smoothly.
Recommended Air Compressor Hoses
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Air Hose Reels
Clarke CAR9PC 9 Metre Retractable Air Hose Reel – 3126005
Original price was: £59.95.£43.38Current price is: £43.38.- 9 Metre Hose: Provides ample length to reach various work areas, ideal for use in your workspace.
- Retractable Design: Keeps the hose tidy and organised when not in use, reducing clutter and maintaining an orderly environment.
- Wall-Mountable: Saves space by allowing easy installation on walls, helping to keep your workspace clear and efficient.
- Durable Construction: Built to withstand daily use, ensuring long-lasting reliability in demanding environments.
- Ideal for Air Supply: Perfect for use with air tools and compressors, ensuring reliable air delivery in your workspace.
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20m Air Hose Reels, Air Hose Reels
Brennenstuhl Anti-Twist Compressor Hose Reel – 20 Metre Hose – 1127033
Original price was: £74.95.£58.70Current price is: £58.70.- 20 Metre Hose: Offers excellent reach for a variety of air compressor tasks, providing flexibility and convenience in any workspace.
- 15 Bar Pressure Rating: Compatible with PCL or DIN quick couplings, ensuring efficient air delivery for pneumatic tools and machinery.
- Anti-Twist Design: Minimises kinks and tangles, ensuring smooth, uninterrupted operation while enhancing the hose’s lifespan.
- Wall Mountable: Includes fittings for easy installation, allowing you to store the hose neatly and save space in your workshop or garage.
- Bright Blue Hose: Highly visible for quick identification and ease of use in busy work environments.
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Air Hose Reels
Draper Retractable Air Hose Reel with 12m Hose
Original price was: £99.49.£68.72Current price is: £68.72.- 12 Metre Hose: Provides extended reach, ideal for larger workspaces and varied applications.
- Maximum Working Pressure of 10 bar (145 PSI): Ensures powerful and consistent air delivery for all your compressed air needs.
- 6.5mm Bore Size: Optimised for efficient airflow, ensuring smooth operation of air tools and equipment.
- Auto-Rewind Mechanism: Automatically retracts the hose for easy storage, keeping your workspace tidy and organised.
- 1/4 BSP Thread Hose Connection: Compatible with a wide range of air tools and compressors for versatility and convenience.
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Air Hose Reels
Sealey Retractable Air Hose Reel 15m Ø8mm ID – PU Hose
Original price was: £158.95.£125.72Current price is: £125.72.- Durable Double Braided Polyurethane Hose: Fitted with 1/4″BSP female inlets and 1/4″BSPT male outlets for a secure, leak-free connection.
- Auto-Layering Mechanism: Ensures smooth retraction by distributing the hose evenly back into the reel, preventing jamming.
- Easy Mounting: Includes a mounting bracket and fixing kit for simple wall or ceiling attachment, saving valuable workspace.
- Compact & Space-Saving Design: The retractable hose makes storage quick and easy, keeping your workspace neat when not in use.
- Heavy-Duty Polypropylene Casing: Built to withstand tough environments, ensuring durability and long-lasting performance.
Maintenance and Troubleshooting
Regular maintenance is crucial to keep your spray painting compressor in top condition. Clean the air filter regularly to prevent clogs, which can reduce airflow and efficiency.
Draining the tank after each use is also essential. Moisture can accumulate inside the tank, leading to rust and corrosion. Draining the tank helps prevent these issues and extends the life of your compressor.
Lubricating the moving parts is important for smooth operation. Follow the manufacturer’s instructions for lubrication intervals to ensure the compressor runs efficiently.
- Compressor won’t start: Check the power supply and circuit breaker.
- Low air pressure: Inspect and clean the air filter and hose.
- Excessive noise: Could indicate mechanical issues or loose parts.
- Moisture buildup: Drain the tank regularly to prevent rust.
FAQs About Spray Painting Compressors
What safety precautions should I take when using a spray painting compressor?
Always wear protective gear, including a mask, gloves, and goggles. Ensure the area is well-ventilated and avoid open flames or sparks.
What’s the difference between HVLP and LVLP spray guns?
HVLP spray guns use high air volume at low pressure, ideal for fine finishes with minimal overspray. LVLP guns use less air, making them great for smaller, detailed projects.
How do I maintain my spray painting compressor?
Clean the air filter, drain the tank, and lubricate the moving parts regularly to keep your compressor running smoothly.
Conclusion
Choosing the right spray painting compressor and maintaining it properly is essential for achieving professional results. Whether you’re working on a DIY project or a large-scale commercial job, understanding how to select, set up, and care for your compressor will ensure smooth, high-quality finishes every time.
If you need expert advice or help choosing the right air compressor for painting or spray gun compressor, feel free to reach out!
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