Rotary Screw Compressors for Sandblasting

What compressor is needed for sandblasting?

Sandblasting is a technological process in which a stream of abrasive removes dirt, rust, old paint or creates a rough surface for further treatment of metal, stone, a car body's surface, scratches from glass, and other materials. A key element in this cleaning system is the compressor, which provides a jet of sand or other components at high pressure from the gun - from 3 to 12 bars.

In this article, we will review how to choose a compressor for a sandblasting machine and what to look for when making your choice.

How much does a sandblasting compressor cost?

There are two types of compressors for sandblasting:

• piston, usually feeds only one gun, provides low bars with fluctuations, overheats, and ejects more oil and moisture into the stream. However, despite the drawbacks, it is suitable for those seeking the cheapest option for a garage and household needs;
• rotary screw compressors for sandblasting are always a bit more expensive. However, these are professional units that work 24/7 and offer better use quality of the sandblasting chamber.

However, price is not the only factor affecting the choice - even major retail networks in Ukraine, like Epicentr, often only have piston models in stock. Screw types are sold by companies specialising in industrial equipment - "Specialist" is a manufacturer and direct importer of compressor units.

Why is a rotary screw compressor better for sandblasting?

Sandblasting equipment requires high compressor performance, as the pressure must remain stable. Rotary screw compressors have several advantages over piston analogs, main ones include:

1. Constant air supply – the absence of pressure fluctuations allows even distribution of abrasive material.
2. High performance – rotary screw compressors can deliver large volumes of air, which is critical for effective sandblasting.
3. Energy efficiency – use less electricity compared to piston compressors at similar performance.
4. Low noise level – operate significantly quieter, making them convenient for indoor use.
5. Durability and reliability – due to fewer moving parts, rotary screw compressors require less maintenance and last longer.
6. Lower vibration levels – reduces equipment wear and improves operator working conditions. Our company always has in stock compressors with frequency converters, which generate less noise during operation.
7. Compressed air quality – efficient filtration and drying systems prevent problems with moisture and contamination in the system.

How a rotary screw compressor works for a sandblasting chamber

A rotary screw compressor uses two rotors (screws) that rotate in opposite directions, creating a sealed work area where air compression occurs. As it moves between the rotors, the volume compresses and pressure in bars increases. Unlike piston compression, this occurs more smoothly and ensures better operation of the sandblasting machine.

Main components of a rotary screw compressor:

• Screw pair – responsible for the air volume compression process.
• Oil system – lubricates, cools, and seals the compressor.
• Filtration system – cleans the air of impurities.
• Dryers – remove moisture, preventing condensation formation, are optional. Our online store can offer a large selection of filtration systems for compressed air processing.
• Control system – monitors the compressor's operating parameters, including bars.

For surface sandblasting.

Criteria for choosing a rotary screw compressor for sandblasting

The choice of compressor depends on several key factors:

1. Performance (L/min or m³/h) – sandblasting machines require a large amount of air. Usually, the sandblaster manufacturer specifies this in the technical documentation.
2. Working pressure (bar) – the standard pressure for sandblasting units is 6-10 bars, but some jobs require 12-14 bars.
3. Receiver volume – the receiver helps smooth pressure fluctuations and provides an air reserve.
4. Dryer type – adsorption dryers are better for sandblasting, as they provide minimal humidity levels.
5. Filtration type – quality filters prevent oil and other contaminants from entering the system, which prolongs the lifespan of the sandblasting equipment.
6. Energy efficiency – compressors with inverter drives can reduce energy consumption when processing material surfaces.
7. Mobility – for construction and repair work, portable compressor models are convenient.
8. Availability of service maintenance – it is important to consider the availability of spare parts and service maintenance for the chosen model. Since many elements work under pressure - it is important to understand the possibility of prompt repair.

Our company always maintains in stock all the goods required for maintenance. When buying a compressor for sandblasting from us, you can be sure the equipment won't be idle.

Tips for operating a rotary screw compressor in sandblasting work

To ensure the compressor operates effectively and for a long time, follow a few recommendations:

1. Check and replace oil – oil compressors require regular oil changes to prevent part wear.
2. Monitor filter condition – dirty filters reduce work efficiency and can lead to particle entry into the system.
3. Monitor humidity level – excessive moisture can damage sandblasting equipment and degrade processing quality.
4. Regularly drain condensate – helps avoid corrosion and rust formation in the system.
5. Conduct technical maintenance – timely diagnostics help prevent serious breakdowns and extend equipment lifespan.

The built-in controller monitors all parameters of Specialist screw compressors - allowing you to adjust bars, and also shows motor hours and time until the scheduled maintenance. Our product meets the world's advanced technologies.

Conclusion

Rotary screw compressors are the optimal solution for sandblasting glass and metal due to their high performance, bar stability, and reliability. They ensure uninterrupted operation of sandblasting equipment, which is crucial for obtaining quality results. When choosing a compressor, it's important to consider its power, pressure, air filtration and drying system, as well as ease of operation. Adhering to maintenance rules will extend the compressor's lifespan and reduce repair costs.

Investing in a quality rotary screw compressor is a step towards efficient and seamless work of sandblasting equipment, making it indispensable for industry, construction, and repair.