In paint mist extraction, large volumes of air are often removed from the paint booth via the exhaust system. Without properly balanced supply air, negative pressure can quickly develop, leading to drafts and unstable airflow in the room.
Supply air systems specifically balance these air volumes and ensure stable conditions in the paint booth.
In paint shops, a supply air system ensures that the volume of air extracted by the exhaust air system is specifically replaced. Without this supply air, a negative pressure would develop, leading to unstable flow conditions and a reduction in quality.
In conjunction with the extraction or exhaust air system, the supply air system ensures an even air flow, stable process conditions and a clean surface finish.
If the air removed by the extraction system is not specifically replaced, an imbalance in the air conditions will develop in the paint shop. This causes air to flow in uncontrollably through openings or leaks, thereby altering the airflow in the room.
with balanced suply air
without sufficient supply air
→ A properly calibrated supply air system prevents these effects and ensures consistent conditions throughout the system.
Supply air systems operate in direct conjunction with the extract air system. The volumes of air extracted are specifically balanced, resulting in a stable air balance.
In practice, the supply air is designed to maintain a slight positive pressure in the paint booth. This prevents unfiltered ambient air from entering the process.
At the same time, the way in which the air is introduced is crucial. A uniform and draught-free supply of air ensures stable airflow in the room and prevents disruption to the spraying process.
A supply air system continuously supplies the paint booth with treated fresh air. The outside air drawn in is first filtered to remove particles and contaminants. It can then - depending on the ambient conditions - be heated before being distributed evenly troughout the room.
The key task is not merely to replace the air, but to supply it in a defined state and distribute it in a targeted manner.
Typical applications are:
→ The aim is to achieve uniform air distribution without any disruptive turbulence.
Supply air systems consists of several funtional components which, together, enable the treatment and distribution of supply air.
Typical structure:
The components are modular in design and can be flexibly adapted to different systems and requirements.
Different supply air systems are used depending on the application.
Supply air systems with fresh air intake allow for complete control of air quality and are used primarily in larger paint shops.
Supply air systems that draw in air from hall utilise the existing ambient air and are particularly suitable for smaller or integrated systems.
Make-up air systems provide a simple solution for ensuring the necessary air balance when exhaust air flow rates are low.
→ The choice depends on the air volume, the system design and the process requirements.
During operation, the supply air system is adjusted directly to match the capacity of the extract air system,
so that a stable air balance is achieved.
The following are particularly relevant:
Temperature:
if the temperature is below approximately 18 °C, the supply air should be heated
Controllability:
the air flow can be adjusted continuously
Energy-efficient:
good insulation reduces heat loss
Condensation:
for fresh air systems, a vent is required
→ These factors influence both operational safety and process quality.
The supply air has a direct impact on the finish of the paintwork. Filtered air prevents dust ingress, whilst consistent flow conditions ensure a stable spraying process.
The main effects are:
→ A correctly designed supply air system is therefore a key factor in ensuring quality.
Supply air systems are an integral part of any paint shop. It is only the coordinated interaction of the extract air system, supply air and air distribution that ensures stable process conditions.
Whilst the exhaust air system reliably removes paint mist, the supply air provides the necessary conditions for a consistent and controlled process.
Would you like to ensure that your supply air and extraction systems are optimally coordinated?
Our experts will assist you in designing a suitable overall system.
