Equalizer® Surge Dampener - Integrated SD Series (ISD) features a design that integrates the dampener directly into the manifold of Wilden’s metal pumps. The ISD Series surge dampeners are engineered to reduce fluid pressure and flow fluctuations that are inherent in air-operated double-diaphragm (AODD) pumps, providing a smoother discharge flow. This function is critical in applications that need to minimize vibration and control pipe hammer which protects the piping system as well as downstream instrumentation.