The controller is a self-acting differential pressure controller primarily for use in district heating systems. Direct operated, reliable and high precise controller closes on rising differential pressure.The controller has a control valve, an actuator with one control diaphragm and spring for differential pressure setting.Further on two valve versions are available:∙ VFG 22 with metallic sealing cone∙ VFG 221 with soft sealing coneTogether with Danfoss intelligent electrical actuator AMEi 6 intelligent optimization functions are available:∙ iNET-intelligent network balancing