Working with the DYNAJET WSS Water Sandblasting System

Expert knowledge high-pressure expertise

Water sandblasting is particularly suitable for preparing substrates or for fast, simple and efficient paint stripping. The advantage of water sandblasting is that it only needs about half the pressure of water blasting alone for an equivalent, if not better, result.

When or how do I use water sandblasting?

In water sandblasting, the surface is cleaned using tiny, accelerated particles. Sensitive surfaces should generally not be treated with water sandblasting.
In all other cases, the water-sand jet is clearly advantageous, because the cleaning effect is much more intensive due to the abrasive agents removing unwanted material.

The principle is basically the same as sandblasting, but with the advantage that no dust forms with water sandblasting and the material is washed away by the water.
Independently of this, the grain size of the abrasive can be varied for different results, e.g. a hard-edged abrasive, such as slag, provides a deep, coarse surface structure. On the other hand, abrasives with a round surface, such as quartz sand, provide a finer surface structure. So you can always fine-tune the result you need.

How do I set the DYNAJET WSS 500 sandblasting system correctly to achieve a constant flow of abrasive material?

If the WSS 500 is set incorrectly, the abrasive may only come out of the nozzle in gushes. This happens especially with very fine and heavy abrasives, such as soda or garnet sand, if the suction power is set incorrectly.

We therefore recommend the following procedure:

  • before you start blasting work, turn the air supply adjustment completely open (holes open)
  • pull the trigger on the gun to start the water flow
  • check whether abrasive is already being sucked in
  • slowly close the air supply (close the holes) to increase the suction power until the desired amount of blasting material flows through the hose

If the air supply is completely closed, too much abrasive may be sucked in and accumulate in the hose. This results in the abrasive coming out unevenly, in gushes, or completely clogging the suction hose. In addition, you should always make sure that the suction lance is as deep as possible in the abrasive so that sufficient material can always be sucked in.

If possible, hold the water sand blasting nozzle downwards so that no water can flow into the blasting agent hose and cause blockages.
Please check regularly that all 3 high-pressure nozzles are completely free of blockages to get full performance and to avoid irregular wear of the focus nozzle.

Further information:

Equipped for every challenge – DYNAJET offers a comprehensive range of high-quality accessories for working with your high-pressure cleaner. DYNAJET accessories are compatible with almost all common professional high-pressure cleaners.