Equalizer® Surge Dampeners - Integrated SD (ISD) series metal compliment Wilden's® standard bolted air-operated double-diaphragm (AODD) pumps to deliver maximum process fluid containment. They are engineered to reduce fluid pressure and flow fluctuations that are inherent in AODD pumps, providing a smoother discharge flow. This allows the ISD Series to be an ideal solution for a wide range of applications, including, but not limited to, oil and gas, paints and coatings, and chemical.