The Importance of Water Quality for Waterjet Cutting



Waterjet cutting is one of the most revolutionary inventions that has helped many different industries from manufacturing to the medical field. The powerful jet of water is made for precision and flawless cutting. For a good quality waterjet cutting machine to perform its best, quality water is also needed. So, what is a good quality water?


Total Dissolved Solids

Using good quality of water can extend the service life of the waterjet machine. Bad water can accelerate the wear and tear of the components of the machine that come directly in contact with the high-pressure water. If you want to achieve good water quality to use for waterjet cutting, you need to filter out impurities. Impurities in water must not reach the cutting head or the high-pressure line. However, experts recommend that water must have 60-70 ppm of total dissolved solids, and not zero. Removing all water impurities is actually counterproductive.


Suspended Solids

Aside from the total dissolved solids in the water, suspended solids must also be filtered from water. While dissolved solids in the water are able to pass through filters, filters can trap suspended solids. Suspended solids in water may include a range of different materials from the environment such as decaying plant substances, residue or deposits, industrial wastes, and more.

The same as dissolved solids, suspended solids in the water can also shorten the pump life of the machine. Suspended solids can become abrasive if they reach into the high-pressure stream, and can damage the equipment. You can use both pre-filtration and final filters, which are specifically designed to do the job of eliminating suspended solids. You’ll find these filters inside the pump before the intensifier. You can easily change these filters by hand.


Water pH

The pH level of water is another important factor to consider in achieving quality water. Low pH of the water means it’s acidic, which can wear off the high-pressure tubing of the machine. As a result, you would need to replace it more often than it is should. On the other hand, high pH water is also not good for the tubing. Calcium carbonate can build up inside the tubing, which can break off sooner or later and can move through the tubing, damaging the waterjet opening. The ideal pH level of water to be used for waterjet cutting is pH level 7. It is not acidic and it is not so basic as well. Waterjet technicians could regulate the pH level of water by using a water softener.


Temperature of the Water

Water temperature could also influence directly the life of the machine components. Water that will enter the high-pressure pumps are kept at a certain temperature to promote longevity of the seal. The water must be cold as below 70° F. Some companies often use a chiller system if the tap water is not cool enough.

Note that the water temperature can vary depending on environmental factors such as changes in season, rainfall, and other weather conditions. To keep water at constant temperature, waterjet experts suggest that companies to use chillers and closed-loop systems.



If you want to maximize the benefits of waterjet technology as well as achieve excellent output, then make sure that the water you are using for your waterjet cutting operations is of high quality.


topics: water jet cutting