A common occurrence that may appear in dispensing fluids is air bubbles.

Air bubbles can occur in many different ways. They can form naturally when air is trapped between the folds of high-viscosity fluid whilst dispensing. Forceful or excessive air pressure applied to the dispensing system, syringe, or cartridge can also create air bubbles. Sometimes air can be trapped in the delivery pipes of fluid tanks to the dispensing systems. Leaky equipment and accessories like pipes, pumps, or valves can also be one of the main reasons for air bubbles in fluid materials. In short, there are many reasons why there could be air bubbles in fluid materials, but how will air bubbles affect fluid bonding and adhesiveness?

Air bubbles not only cause a defect in appearances, and adhesiveness to the bonding materials but also impair physical properties. It can also result in dispensing defects and inconsistencies which may hinder product quality and fluid wastage.

Here are some ways to prevent air bubbles from forming

1. Store syringe, cartridges, tanks, barrels, etc in an upright position.-Never leave them lying on their side.
2. When dispensing from a syringe, it is preferable to use pressure not exceeding 60 psi.
3. For a two-part fluid mixture, consider a Dual Components Meter-Mix Dispensing Systems.-Mixed and dispensed without creating air bubbles. In fact, some of these systems come with degassing features.

How To Eliminate Air Bubbles

1. Vacuum degassing (Chamber)
   Pour fluid material in a large container that is at least five times larger in volume. The amount of vacuum pressure to use depends on the material. However, it is also possible that too much time in the chamber will have the opposite effect and affect fluid material properties.
2. Vacuum degassing (in tanks with Agitator)
   Degassing in pressure tanks can be more effective if combined with an agitator.
3. Fluid Centrifugal Deaerator
   This works very well by “moving” the air bubbles in the material to one end. The time needed for this process depends on material viscosity.
4. Store bottles and syringe upright
   This method can be effective if the material is not viscous as the air bubbles can float up to the piston end of the syringe or escape through the surface of fluid material in a bottle.

Efficient Removal Of Air Bubbles In Syringes With Our Centrifugal Fluid Deaerator

Air bubbles might be entrapped in syringes during the packaging of 3cc, 5cc, 10cc, 30cc, or 55c syringes, the transferring of fluid from its original packaging to syringes, or the mixing of more than one fluid material.

These air bubbles should be removed in order to ensure the dispensing accuracy. Air bubbles trapped in the syringe are compressed and expanded during each dispensing cycle. This causes drooling or oozing, which is a major cause of inconsistent dispensing especially with high viscosity fluids.

Our Centrifugal Fluid Deaerator (CFM Series) are designed to address this issue. It is easy to use and highly efficient. The CFM comes with programmable speed and a reliable safety system. The safety lock prevents the cover from during operation. It is also equipped with a vibration sensor that detects any imbalanced loading or abnormal vibration.

Both our CFM1001 and CFM2001 are equipped with a powerful electric motor at a rotation speed of 1500 rpm. While CFM2000 requires 60 seconds before the syringes can be safely removed from the system, the CFM1000 is equipped with a quick stop motor which allows the syringes to be removed immediately.

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