What is the recommended maximum turn down ratio to minimize noise within a piping system?

The recommended maximum turn down ratio to minimize noise within a piping system is 10:1. This specific ratio is considered optimal because it strikes a balance between operational efficiency and noise reduction. A turn down ratio represents the range over which a system can efficiently operate, from its maximum capacity down to its minimum while still achieving effective performance.

When the turn down ratio is set at 10:1, it ensures that the system can adjust its flow rates effectively, minimizing turbulence and the associated noise that can arise when flow is reduced too drastically. Higher ratios, such as 15:1 or 20:1, could potentially lead to excessive noise levels within the system due to increased turbulence and flow irregularities, especially at lower flow rates. Conversely, a ratio such as 5:1 might not provide the necessary flexibility to operate effectively across a wider range of conditions. Thus, the 10:1 ratio is ideal for achieving both operational stability and reduced noise levels in a piping system.