Ultra-high pressure water jet has great kinetic energy, through the impact of high-speed jet, can strip a variety of surface materials, such as coating, paint layer, surface rust, surface scale, etc. Ultra-high pressure water jet cleaning technology has clean and pollution-free, energy-saving, efficient, explosion-proof safety and other characteristics gradually replace the traditional chemical cleaning, sandblasting process, is an ideal physical cleaning method. At present, it has been widely used in many industries including aerospace, petrochemical, power plant, ship repair, automobile manufacturing and construction.



The use of ultra-high pressure water jet for rust removal requires sufficient water pressure (1000~2800 bar) and flow rate (10~200 L/min). When the ultra-high pressure water jet rotary nozzle performs rust removal and cleaning operations, the high pressure pump group first plays ultra-high pressure water, and then reaches the nozzle through a certain pipeline, and then sprits out through the ultra-high pressure water rotary nozzle. The powerful high-pressure water jet is sprayed on the working surface, so as to achieve the purpose of rust removal and cleaning, but because the ultra-high pressure water rotary nozzle needs to continue to work under the influence of high temperature and rotary wear caused by high pressure and high flow rate, it is necessary to select the rotary nozzle.


First, the selection of ultra-high pressure water jet rotating nozzle

1, according to the cleaning object

Select different pressure, flow rate and type of rotating nozzle according to the cleaning object. For cleaning the inside of the reactor with serious scaling, it is necessary to use a three-dimensional rotating nozzle which is about 20% higher than the output pressure of high pressure cleaning.

2, according to the material selection

The higher the pressure of high-pressure water jet operation, the more careful the choice of nozzle material, generally more than 1000bar of ultra-high pressure water jet operation, commonly used carbide, artificial gems and diamonds or in stainless steel inlay these materials.

3, according to cleaning requirements

Different cleaning requirements, the size and shape of the rotating nozzle will be different, for large area cleaning tasks, should choose a large nozzle; When cleaning corners or compact areas, a small rotating nozzle is more suitable.

4, according to the rotation speed selection


The lower the rotational speed of the rotating nozzle, the better the shape of the jet can be guaranteed and the impact force of the jet can be improved. When the speed is too high, it will cause the jet to form atomization, resulting in reduced impact force, so the rotating nozzle basically has the centrifugal speed limit, damping oil speed limit, magnetic speed limit and other speed limit functions.

In addition, in order to have good cleaning efficiency and service life when rotating cleaning nozzle operation, the internal structure, processing accuracy, and incidence Angle during cleaning should also be considered when selecting the rotating nozzle, so it is best to consult professionals for help when selecting the ultra-high pressure water jet rotating nozzle.

Second, the application advantages of ultra-high pressure water jet rotary nozzle

Compared with ordinary nozzles, the wave water generated by high-pressure rotating nozzles can not only remove dirt faster and easier, but also save water and cleaning agents. Taking Degao Jih double-hole powerful rotating nozzle as an example, it can be applied to hydraulic operation of 1000~2800 bar, and the nozzle can also do linear motion while rotating at high speed. It can spray out a large coverage, more uniform, and strong impact high-pressure water jet, which usually improves the efficacy of more than 40% than ordinary nozzles, and can be applied to local paint and rust removal operations on the surface of the equipment, stubborn oil cleaning, hard dirt removal, rust removal and cleaning operations of large-scale ships, storage tanks and other equipment.

Third, the use of ultra-high pressure water jet rotating nozzle precautions

Ultrahigh pressure water jet rotating nozzle in the use of the process need to comply with the use of safety guidelines and regular maintenance, in order to improve the service life of the nozzle, in addition, the general ultra-high pressure water jet rotating nozzle is mostly installed on the spray gun barrel in a threaded connection, the pressure level of the spray gun and the nozzle should not be lower than the rated pressure of the high pressure pump, rust removal spray gun should be used overflow spray gun. When using a hand-held spray gun, its recoil force should not be greater than 200 N, and not greater than 1/3 of the operator's body weight, the minimum length of the spray gun should meet the provisions of GB/T 26148, the spray gun should be set up a locking mechanism, if beyond the range, the spray gun should not be hand-held work, the need to set a fixed mechanism to reliably fix the spray gun on the relevant operating platform for operation.