Does water jet screw compressor need pure water?

Conclusion first

water jet screw compressor does not have to use pure water, but absolutely can not directly use tap water. Softened water or simply filtered water is enough. Of course pure water can be used, but there is no need to spend that money, and the cost performance is not high. Water-lubricated air compressors have requirements for water quality, but this requirement is clean, not pure.

Why not just tap water?

There are many invisible things in tap water, such as calcium and magnesium ions, rust, sediment and residual chlorine. These things into the compression chamber after the problem.

Calcium and magnesium ions will become scale after heating, attached to the screw and the inner wall of the casing. The scale is piled up layer by layer, the gap becomes smaller, the seal becomes worse, the exhaust volume decreases, and the machine becomes more and more expensive. Rust and sediment will wear the surface of the screw, the accuracy of the screw will decrease over time, the gap will become larger, the leakage will increase, and the machine performance will become worse and worse. Residual chlorine can corrode metal parts and shorten machine life.

Therefore, if tap water is used directly, there may be no problem in the short term, and the machine will start to go wrong soon.

Is pure water necessary?

Pure water is to remove almost all impurities in the water, leaving only water molecules. Of course, it is best to use pure water. The machine will not scale or corrode, and the service life is the longest.

However, the cost of pure water is very high. It is necessary to buy special equipment to make water. It is necessary to change the filter element and resin on a daily basis, and the maintenance cost is not low. For most factories, this is not worth the money. Because the water-lubricated air compressor needs water without hardness, particles and corrosive substances, not pure water without any ions.

What water is best.

The most recommended is softened water. Softened water is to remove calcium and magnesium ions from tap water, but other ingredients are still there. Softened water does not scale, and the cost is much lower than that of pure water. A softened water equipment costs thousands of dollars, and salt can be used, and maintenance is simple.

If there is no softened water equipment, pure water can also be used. Pure water is lower than the standard of pure water, but it can also meet the requirements of water-lubricated air compressors, and the price is much cheaper than pure water.

Another option is to add a set of filtering device in front of tap water to remove sediment, rust and residual chlorine, and add a scale inhibitor, which can also be used. However, this scheme is not as easy as softening water. Scale inhibitor should be added frequently. If you forget to add it, problems will easily occur.

Core Requirements for Water Quality of Water Lubricated Air Compressor

water lubricated air compressor with water instead of lubricating oil, water directly into the compression chamber for lubrication, sealing and cooling. Whether the water quality is good or not directly determines how long the machine can last.

There can be no hardness in the water, otherwise it will scale. There must be no particles, otherwise it will wear out. Can not have corrosive substances, otherwise it will rust. As long as these three items are met, the machine can run stably for a long time.

The condensed water discharged from the water-lubricated air compressor is itself clear water. If the water inlet is also clean softened water, the whole water circulation system is clean, there is no problem of oil pollution, and oily wastewater will not be produced. Late maintenance costs are low, no oil change, no oil cleaning, no waste water treatment.

One sentence summary

water jet screw compressor does not need pure water, softened water is enough. Tap water must not be used directly, it will scale and corrode and wear. Pure water is too expensive and unnecessary. Softened water is the most cost-effective. The water-lubricated air compressor is used with softened water. The machine has long life, low maintenance cost, and no oil pollution. It is the most worry-free combination.