BOV Technology Explained: Why Propellant-Free Oil Spray is Better

What is BOV technology?

Many oil sprays say "no propellants" or "propellant-free" — but what does that actually mean? And why should that be important to you in a kitchen product?

The answer lies in a technology called BOV — Bag-on-Valve. In this article, we explain how it works and why it makes the difference between a simple oil spray and a premium kitchen product.

Conventional Aerosol Sprays: Propellants as a Problem

Most spray cans — whether deodorant, hairspray, or cooking spray — work with chemical propellants like butane, propane, or dimethyl ether. The gas is under pressure and pushes the contents through the nozzle.

The problem with oil sprays containing propellants:

• Chemical residues: The propellant comes into direct contact with the oil and can leave residues on your food.
• Additives needed: Emulsifiers like lecithin are often added to prevent the oil and propellant from separating.
• Flavor alteration: The chemical additives can affect the taste of the oil.
• Flammable: Propellants are highly flammable — not ideal near a hot air fryer.

BOV Technology: Pure Oil Through Air Pressure

With Bag-on-Valve technology, the oil is filled into a flexible bag within the can. Compressed air — not chemical gas, but normal compressed air — is introduced between the bag and the can wall.

When you press the spray head, the compressed air squeezes the bag and pushes the pure oil through the nozzle. The oil never comes into contact with the propellant.

The Advantages at a Glance

100% Pure Oil

No propellant, no lecithin, no emulsifiers, no preservatives. What comes out of the can is exactly the same oil you would pour from a bottle — just as a perfect spray mist.

360-Degree Spray Function

Because the flexible bag is compressed from the outside, the spray mechanism works at any angle — even upside down. In conventional spray cans, the dip tube must be submerged in the liquid, which doesn't work upside down.

No Clogging

Because there are no emulsifiers or propellants that can crystallize or clump, the nozzle does not clog. This is a common problem with refillable oil sprayers and conventional aerosol sprays.

Long Shelf Life

The oil in the BOV bag is completely protected from oxygen and light. Oxidation — the main reason for rancid oil — does not occur. Therefore, the shelf life is up to 2 years, without loss of quality or taste.

Consistent Dosing

The constant air pressure ensures a consistent spray mist from the first to the last spray. No weakening pump, no dripping at the end — every spray delivers the same amount.

How Do You Recognize a Genuine BOV Spray?

Not every "propellant-free" spray uses BOV technology. Look for these signs:

• The term "Bag-on-Valve" or "BOV" on the packaging.
• "100% pure oil" without lecithin or emulsifiers in the ingredient list.
• The 360-degree spray function — if it works upside down, it's BOV.
• Metal can instead of a plastic bottle with a pump.

Who Benefits from a BOV Oil Spray?

If you regularly cook with an air fryer and value clean ingredients without additives, a BOV oil spray is the best choice. It is more hygienic than refillable sprayers, more precise than a silicone brush, and healthier than conventional aerosol sprays.

Especially in the DACH region, where consumers are increasingly paying attention to ingredient transparency, premium brands like AÉRfryPRO® rely on this technology — and thus deliver a product you can use daily in the kitchen with a clear conscience.