Bag-on-Valve has long been the go-to solution for brands looking to move away from hydrocarbon propellants. It solves a real problem. But it also introduces a new set of challenges, ones that many brands only fully appreciate once they’re already committed to the technology.
There is now a better option.
Salvalco’s Eco-Valve™ offers everything BOV delivers, and then some:
- A better, more consistent spray performance
- Lower costs
- Easier filling
- Simpler sustainability
For brands evaluating their aerosol format options in 2026 and beyond, there are now smarter alternatives to bag-on-valve.
Why Brands Choose Bag-On-Valve in the First Place
To understand why Eco-Valve™ represents such a significant step forward, it helps to understand what makes BOV the popular choice.
A Bag-on-Valve system uses compressed gas, typically CO2 or nitrogen, to squeeze product out of a foil bag inside the can. Because the propellant never contacts the formulation directly, BOV opens up possibilities that standard aerosol valves cannot. With no oxidisation or contamination risks, a BOV makes it possible to use preservative-free and sensitive formulations. The system also functions at any angle, which has made it particularly popular in personal care and pharmaceutical applications.
For brands moving away from LPG, due to ever-more increasing regulatory burdens such as CARB in the US or CBAM in Europe, BOV has historically been the path of least resistance. But it comes with significant trade-offs.
What Are the Disadvantages of Bag-On-Valve
Costs
The laminate bag at the heart of a BOV system is expensive to produce. Four-layer, mixed-material constructions manufactured in pharma-controlled environments add complexity and cost that standard aerosol components simply don’t carry. Lower-specification two-layer bags reduce that cost, but increase the risk of product failure, a trade-off most brands are unwilling to accept.
Recyclability
The recyclability challenge compounds the issue. The laminate bag is difficult to separate and process at end of life, which sits against the sustainability credentials BOV is often chosen to support.
Filling
Then there is the filling line requirement. BOV systems need specialised equipment and typically run at slower filling speeds than standard aerosol lines. For manufacturers without existing infrastructure, that means capital investment before a single unit is produced.
Performance
BOV systems suffer from inconsistency during the last portion of the can’s life. Once around 40% of the product remains, discharge rate and particle size both become harder to control. In testing, standard BOV shows jetting, dribbling and enlarged particle size as pressure drops. All of these create a noticeably worse experience for the end consumer.
How Eco-Valve™ Answers Each of Those Challenges
Eco-Valve™ was designed specifically to address these limitations, delivering the core benefits of BOV without the drawbacks attached to them.
Cost
Because Eco-Valve™ uses nitrogen as the propellant in direct contact with the formulation, there is no laminate bag required. Nitrogen is inert, meaning it does not mix with or interfere with the bulk formulation. The result is a simpler, single-specification component with a less complex supply chain and, in most cases, a cost saving of between 25% and 50% versus BOV.
Filling
Eco-Valve™ can be filled on traditional aerosol lines, with only a minor filling head modification required. There is no specialist equipment needed and no reduction in filling speed. For manufacturers already running standard aerosol lines, the transition is straightforward. For those already invested in BOV infrastructure, switching to Eco-Valve™ still delivers meaningful cost savings over time.
Performance
At Salvalco, our proprietary technology controls pressure decay throughout the life of the can, maintaining consistent discharge rate and particle size from first use to last. In direct comparison testing against standard BOV, Eco-Valve™ delivers smaller, lighter particles and a drier spray, with minimal droplet fall-out. Where BOV begins to lose consistency at around 40% product remaining, Eco-Valve™ maintains performance to the end of the can with no noticeable change in spray quality.
Formulation Compatibility
Because nitrogen does not oxidise or contaminate the bulk formulation, Eco-Valve™ is suitable for the same sensitive and preservative-free formulations that have historically driven brands toward BOV. Natural formulations, oils, emulsions, resins and powders are all well served by the technology.
Consumer Experience
Independent research consistently highlights the quality of the Eco-Valve™ spray experience. The fine particle size produces a soft, delicate finish on hair and skin. There is no flash-freeze effect, no harsh sound on actuation, and no risk of misuse or abuse. It is quieter than the next best alternatives and dries faster on skin due to the smaller particle size produced.
Peter Shaw, Managing Director at Salvalco, explains:
“Eco-Valve™ was built to give brands a genuine alternative to BOV spray applications — not a compromise. The technical case is compelling, but what we see time and again is that brands are equally attracted to the simplicity of it. No specialist filling lines, no complex componentry, and the performance data backs up what consumers already tell us: the spray experience is exceptional.”
Can Eco-Valve™ Spray Upside Down?
One of BOV’s functional advantages has always been its ability to dispense at any angle. Eco-Valve™ handles this through Eco-Inverted ®, our patent-pending inverted spray technology.
Eco-Inverted ® uses ball valve functionality to enable consistent dispensing in any orientation. This prevents nitrogen depletion when the can is tilted or held upside down. It uses the same filling process as standard Eco-Valve™, requiring no additional line changes, and is available in large-capacity production volumes. For brands whose product format demands inverted spray capability, Eco-Inverted ® brings that functionality into the nitrogen-powered ecosystem without any of the BOV complexity.
Why Eco-Valve™ is the Environmental Alternative to Bag-On-Valve
The environmental case for Eco-Valve™ over BOV is clear. There is no laminate bag to dispose of, removing one of the most problematic recyclability issues in aerosol packaging. Nitrogen is non-flammable and exempt from VOC and CARB regulations, which simplifies compliance and future-proofs formulations against tightening legislation in the UK, EU and USA.
For brands building sustainability into their product development roadmap, future formulation legislation is essential. It is not just an ethical consideration, but a commercial one.
Eco-Valve™: The Perfect Aerosol Evolution
Eco-Valve™ is not an emerging concept. It is an industrialised, production-ready technology supported by our global turnkey network, in-house laboratory testing capability and hands-on technical support team.
BOV has served the aerosol industry well, but spray technology has moved on. For brands weighing up their options, the performance data, the cost saving and the sustainability credentials all point in the same direction.
To find out more about switching to Eco-Valve™, or to request a sample, get in touch with our team.