The Danfoss Eco-damper solution is a 3 component (3 valve) system build on the ICV modular concept. Each component consists of an ICV housing and 1 of 3 modules performing the functions Dampening (ICD), Non-return (ICC) and Control (ICS 1 or 3 pilots) respectively. The Danfoss Eco-damper solution is used in the economizer line of typical screw compressors to dampen the pulsations from the compressor. The Eco damper system is designed for high damping efficiency over a broad band of low frequencies with neglectable pressure drop. It comes in sizes 32 and 50 and is offered from a parts program giving a wide variety of connection types and sizes. The ICD is a unique damping system combining the Helmholtz, Quarter wave and Expansion chamber principles into a broad band damper, able to reduce the Ammonia pulsations by 30% to 80% for critical frequencies in the frequency range of 100 to 500 Hz