[Case Study] Fundamental Measures Against Water Hammer

Adopting a special butterfly valve as a fundamental measure against water hammer!

At a steel manufacturing company, a cylinder valve was installed in the factory's piping for flow adjustment, but it was difficult to finely adjust the valve opening, leading to water hammer that damaged the piping. They consulted us about whether there is a valve that can reduce the hammer. Issues: 1. The current cylinder valve makes it difficult to finely adjust the valve opening. (It goes from fully open to fully closed suddenly.) 2. They want to reduce water hammer and extend the lifespan of the piping. *Water hammer refers to a phenomenon, also known as water shock, that occurs when the flow of water in a pressurized pipe is suddenly stopped, causing a shock and high pressure within the pipe due to the inertia of the water. When water or steam in the piping is instantaneously halted, the kinetic energy of the fluid has nowhere to go and is converted into pressure energy, resulting in a rapid increase in pressure within the piping (pressure fluctuation) and the generation of a "surge pressure wave" (shock wave). This pressure wave propagates instantaneously over long distances through the piping and fluid (in the case of water, at speeds exceeding 1,400 meters per second), which can cause unusual noises (such as knocking sounds) in distant locations away from the equipment causing the issue, and can damage the piping or valve body.

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