Compressed gas vs non-flammable compressed gas – which should be selected for electronics cleaning?

In the world of IT service and modern office environments, compressed gas has become a fundamental maintenance tool. Over time, however, the question has emerged: conventional compressed gas or non-flammable compressed gas NF? Both solutions belong to the same category, namely compressed gases, but they differ in their properties and applications.

Compressed air and compressed gas – where does the difference in terminology come from if they sound like the same product?

Simply put, “true compressed air” is produced by compressing ordinary atmospheric air using a compressor and storing it in a sealed pressure vessel. The most common applications of compressed air include:

• workshops (inflating car and bicycle tires),
• industry (operation of production lines and automation systems),
• automotive industry (automotive paint shops),
• construction (tools for structural assembly),
• medicine and dentistry (dental drills, respiratory systems, and medical equipment).

Although the terms “compressed air” and “compressed gas” are often used interchangeably, in practice they may refer to products with completely different compositions, properties, and applications.

Compressed air consists primarily of nitrogen, oxygen, and small amounts of other gases contained in a can under high pressure. In theory, it should therefore correspond to ordinary atmospheric air.

Unfortunately, many products marketed as “compressed air” are in fact compressed technical gases or hydrocarbon mixtures. They may be flammable and, if used improperly, can pose a safety hazard. Therefore, before purchase, it is advisable to check the product composition and ensure that it is consistent with the product name and intended application.

Many cleaning aerosols contain:

• technical gases,
• propane, butane, or other hydrocarbon mixtures,
• working agents that provide the required pressure.

Non-flammable compressed gas NF

It ensures safety because it is an innovative solution that cleans effectively and, most importantly, is safe to use. Thanks to its non-flammable formula, it can be used in locations where conventional compressed gas could pose a fire hazard. The gas auto-ignition temperature is as high as 750°C, making the product exceptionally safe under normal operating conditions. When used on live electrical equipment, it is recommended that the ambient temperature be below 28°C, thereby minimizing potential risks.

The greatest advantage of this aerosol is its 360° valve, which allows the gas to be used in any position—vertical, horizontal, or even upside down—without the risk of condensation. This is particularly important in locations where condensate evaporation is difficult and may cause corrosion or even equipment damage. It is an extremely practical solution that facilitates access to hard-to-reach areas. Forget cumbersome cleaning—non-flammable compressed gas reaches exactly where it is needed.

It is often the case that conventional compressed gas leaves streaks, especially on glass surfaces or delicate electronic components. Non-flammable compressed gas features a specially developed formula that leaves no residue or marks. This is particularly important when cleaning screens, monitors, lenses, camera sensors, and other sensitive surfaces.

Compressed gas

Invisible, colorless, and odorless – this gas is, above all, an invisible guardian of cleanliness. As a liquefied gas with a density of 0.57 g/cm³, it not only effectively cleans areas requiring maintenance but is also environmentally friendly, as it is insoluble in water.

Key physicochemical properties of the substance:

• melting point: −187.6°C (propane), −138.3°C (butane),

• boiling point: −42.1°C (propane), −1°C (butane),

• flash point: −95°C (propane), −60°C (butane),

• auto-ignition temperature: 470°C (propane), 365°C (butane).

Non-flammable compressed gas:

• stored under high pressure (in cylinders or pressure vessels),

• does not ignite at temperatures up to 750°C,

• often belongs to the so-called inert gases, which do not chemically react with other substances,

• characterized by high compressibility, allowing storage under high pressure,

• colorless and odorless,

• can occupy a very small volume inside a cylinder,

• rapidly expands upon release.

Applications:

• electronics and computers (does not cause short circuits),
• precision mechanics (removal of dust and metal shavings from small components),
• electromechanics (blowing out control cabinets and automation systems),
• photographic equipment (does not leave streaks on lenses),
• consumer electronics and household appliances (removal of dust from electronic components, keyboards, and cooling fans).

In terms of operational safety, the product significantly outperforms conventional compressed gases. Under normal operating conditions, the risk of ignition is minimal, making the product an excellent choice for electronics service centers, laboratories, and industrial facilities.

Compressed gas is characterized by:

• high pressure (typically ranging from 100 to 300 bar, or even higher),
• the ability to store energy in the form of potential energy,
• high compressibility, allowing the gas to be stored in a small volume,
• invisibility, which makes leak detection more difficult,
• risks associated with high pressure, such as the “rocket effect” of a cylinder in the event of valve damage,
• the potential presence of toxic or flammable properties.

Applications:

• electronics and computers (use only on equipment disconnected from the power supply),
• precision mechanics (blowing out mechanisms and bearings),
• electromechanics (cooling components during service operations),
• photographic equipment (leaves streaks on lenses),
• consumer electronics and household appliances (removal of dust from televisions and audio equipment).

It should be remembered that compressed gas is a flammable product and must be handled with caution during use.

Non-flammable compressed gas vs conventional compressed gas:

What is important is that the non-flammable version is characterized by a significantly higher auto-ignition temperature, which enhances safety during use in demanding professional environments. However, it is worth noting that this is not the only difference—proper operating conditions, storage requirements, and the intended applications of both products are also important considerations. More details can be found in the table below.

Inert gas and Compressed CO2 – alternative solutions

The greatest advantage of these products is the high efficiency of compressed gas, which enables the rapid and effective cleaning of large surfaces and cooling systems. Inert gases and compressed CO₂ are used not only for technical cleaning but also across numerous industrial sectors.

Compressed CO₂ is used, among others, in:

• refrigeration (as an environmentally friendly refrigerant used in modern refrigeration and air-conditioning systems),
• the food industry (it limits the growth of bacteria and mold, thereby extending product freshness; it is also used for cooling and freezing food in the form of dry ice),
• beverage production (carbonation provides the characteristic effervescence of sparkling water, soft drinks, and many other products),
• technological processes (used, among others, as a shielding gas during MIG/MAG welding; it is also used for water pH control),
• technical cleaning (CO₂ cleaning is safe and effectively removes contaminants, grease, and production residues; it does not cause corrosion and leaves no secondary waste).

Types of hazardous gases

• flammable gases – e.g., propane, hydrogen,
• toxic gases – e.g., chlorine,
• asphyxiant gases – e.g., nitrogen (displaces oxygen from the surrounding environment),
• liquefied gases – e.g., CO₂, LPG (may pose hazards due to high pressure and low temperature),
• dissolved gases – e.g., acetylene dissolved in acetone.

Examples of other non-flammable gases:

• Nitrogen – a colorless, odorless, non-flammable, and highly inert gas, constituting approximately 78% of the Earth’s atmosphere,
• Argon – a noble gas that is chemically inert and non-flammable,
• Carbon dioxide – a non-flammable gas that may exist in gaseous or liquid form; it displaces oxygen,
• Helium – a noble gas that is non-flammable and very light.

Summary

If you are looking for a cost-effective solution for standard electronics cleaning, conventional compressed gas is a very good choice. However, if operational safety is the priority, particularly when working on energized equipment or in demanding environments where condensate and streak formation are especially undesirable, non-flammable compressed gas NF is clearly the better option. Both products effectively remove dust and contaminants; however, the non-flammable version provides an additional level of protection and greater user comfort during operation.