Just as sound can have a negative impact on the human body, certain frequencies can also cause serious damage to industrial equipment. High noise levels usually cause vibration and may damage equipment such as pipelines and instruments.

With the passage of time, valve components deteriorate, and the cavitation generated by the valve is prone to serious damage. This type of damage is mostly caused by noise energy generated by vibration, which accelerates the corrosion process. High amplitude vibration can also cause cracking and corrosion of metal valve parts and pipeline walls. Scattered metal particles or corrosive chemical materials may contaminate the medium inside the pipeline, which can have a significant impact on sanitary valve pipelines and high-purity pipeline media.

Although this generally occurs within the valve body of ball valves and rotary valves, it can actually occur in the piping downstream of the valve. When the force on the valve is in one position, it is easy to cause cavitation, which can lead to leakage at the piping and welding repair points of the valve. Whether cavitation occurs inside or downstream of the valve, the equipment in the cavitation zone will be greatly damaged.

Methods for Eliminating Cavitation Damage

The special valve design for eliminating cavitation adopts split flow and graded pressure drop:

“Valve diversion” is the process of dividing a large flow into several small flows, and designing the flow path of the valve so that the flow passes through several parallel small openings. Smaller openings result in less noise and less damage.

“Grading pressure drop” means that the valve is designed with two or more regulating points in series, rather than the entire pressure drop in a single step.

The combination of diversion and staged pressure drop can achieve cavitation resistance through the above methods. During the valve modification process, the pressure at the inlet of the positioned control valve is relatively high (such as on the far upstream side or at a lower height), which can sometimes eliminate cavitation issues.

The phenomenon of valve cavitation not only damages the valve, but also has an impact on downstream pipelines and equipment. Predicting cavitation and taking measures to eliminate it is the only solution. It can avoid the problem of expensive valve consumption costs.