What is bag-on-valve?
A BOV system consists of a can, a valve and a bag attached to the valve. The product is filled into the bag; compressed air or nitrogen sits between the bag and the can wall.
New in the range · Bag-on-valve
BOV valves (bag-on-valve): valve, actuator and cap from a single source.
BOV valves are our new area. In a bag-on-valve system the product sits in a bag attached to the valve while the propellant stays outside the bag – product and propellant do not come into contact. KTH Yildiz combines the valve with more than 30 years of experience in actuators, spray heads and aerosol caps.
How does it work?
Pressing the actuator opens the valve. The pressure in the can squeezes the bag and pushes the product out through valve and actuator – without any propellant escaping with it.
What is the benefit?
The product stays separate from the propellant, and the container can be used in any position and emptied to a very high degree. Compressed air or nitrogen is sufficient as propellant.
Comparison
BOV and conventional aerosol at a glance.
| Feature | Bag-on-valve (BOV) | Conventional aerosol |
|---|---|---|
| Product and propellant | Separate – product in the bag | Together in the can |
| Usual propellant | Compressed air or nitrogen | Mostly liquefied gas (e.g. propane/butane) or compressed gas |
| Position of use | Any position, including upside down | Limited depending on valve and dip tube |
| Emptying | Very high, because the bag is squeezed | Depends on formulation and system |
| Suitable media | Liquids, gels, creams, also higher viscosities | Mainly sprayable formulations |
Note: The table describes the functional principle in general terms. Specific dimensions, materials, pressure ranges and approvals of our valves are defined per project and confirmed against your requirements.
Typical applications
What bag-on-valve is used for.
BOV systems are used wherever the product should not come into contact with propellant gas or where a container has to work in any position. Typical examples on the market are shaving gels, sun-care and personal-care sprays, rinsing solutions and technical products such as lubricants or cleaners.
Which version suits your product depends on medium, viscosity, can size and required discharge. That is why every BOV project with us starts with your key data – not with a standard valve.
System approach
Matching valve, actuator and cap together.
A valve never works on its own. The actuator determines the discharge, the cap protects valve and actuator during transport and storage. Because KTH Yildiz develops and manufactures actuators, spray heads and aerosol caps itself, we match these interfaces in-house.
Toolmaking, sampling and series production are located at one site in Heede near Hamburg. Changes to the part can therefore be implemented directly on the tool and sampled again.
FAQ
Questions about BOV valves.
What does BOV mean?
BOV stands for bag-on-valve. The product is held in a bag connected to the valve; the propellant sits between bag and can.
What are the advantages of a BOV system over a conventional aerosol?
Product and propellant stay separate, compressed air or nitrogen is sufficient as propellant, and the container works in any position and can be emptied to a very high degree.
Which media is bag-on-valve suitable for?
For liquids as well as gels, creams and other higher-viscosity products. Whether a particular medium is suitable is checked on the basis of your information on composition and viscosity.
Which can sizes and technical data do you offer?
BOV valves are our new area. Can sizes, materials and performance values are defined per project – without approved documents we do not state general values.
Does KTH Yildiz also supply the matching actuator and cap?
Yes. Actuators, spray heads and aerosol caps are part of our core range and are matched together with the valve.
Together to series production
Your BOV project. Our expertise.
Send us medium, viscosity, can size and annual volume – we will reply with a technical assessment.