Vapour Blasting, a breakthrough in metal treatment, surface prep or restoration

Gilsen Vapour Blasting – a breakthrough in surface preparation, cleaning or restoration
Gilsen offers a new blasting capability with all the power of standard abrasive blasting, but with much reduced containment and disposal costs, virtually no dust and greater control for surface protection. 
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Advantages

  • Cost effective – fast, uses less abrasive and water, with much reduced containment and disposal cost.
  • Flexible – will remove heavy deposits such as rust and dried cement through to coating removal without damaging the sub-surface.
  • Eco friendly - uses a fraction of the abrasive and water of slurry blasting, reducing both consumption and waste. Ultra low dispersal with virtually no dust, eliminates 95% of airborne particles
  • Portable - the equipment can be moved from location via forklift or crane, and can be mated to any compressor from 185cfm to 900cfm.
  • Metal Surfaces ready for priming
  • Gilsen will provide the item clean and profiled for priming and painting. You will be able to see exactly what the state of the surface is and use whatever your preferred priming method.
  • We use only Super Garnet or glass beads to achieve the best possible result and will guarantee no flash rust for at least 72 hours. To achieve this, we use Holdtight® a salt remover/flash rust preventer that kills all salts and prevents flash rust in one pass, leaves no residue and is approved by most major coating suppliers.

How Vapour Blasting Works

  • Vapour Blasting or Wet Abrasive Blasting, is a mixture of compressed air, media and water vapour.  Consumption is less than one litre of water per minute, and uses a range of abrasive media, with operating pressures as low as 30 psi to a high of 130 psi.
  • Vapour Blasting works by using an abrasive process of mixing blast media with water to create a vapour liquid also known as slurry mix. The slurry mix is then pressurized in the power unit. Once the blast cleaning hose is primed with the slurry mix, blasting commences and is controlled by the operator holding the blast nozzle. The blasting nozzle works on a convergence/divergence system that accelerates the wet vapour flow with pressures as low as 35 psi and as high as 125 psi. These variable settings are used to attenuate the blast stream for low or high aggression.

Why It Works So Well

  • Due to water’s surface tension, media particles are encapsulated, which adds weight and “lubricates” each particle     
  • Water weighs 1kilo per litre, so encapsulating each particle adds at least 60kilos to the weight of the media per hour. Conventional blasters only have the weight of the media and blast with larger particles to achieve more aggressive blasting.     
  • The water assists the flow of the media through the blast hose, thereby reducing any loss of speed caused by friction.     
  • Because momentum is a function of weight and speed, the momentum factor is high, resulting in more efficient and effective blasting    
  • The inertia of the water on each particle of media drives the droplet into imperfections in the impact area. The force of each particle hitting trapped droplets causes additional removal of the coating being blasted, because water cannot be compressed and will burst from the impact area, causing better “feathering”   
  • The water also acts to reduce splash-back. When the encapsulated particle hits the surface, the “water-jacket” is shed. This action traps any dust created by the media and the removed surface material.