Milenium Twin Seal Flap Dampers guarantees 100% sealing. Most of the power plants in  have been using Pneumatically Operated Guillotine Isolators for Mill Isolation. Since the temperature of the primary air at this location is over 300 °C and as these Guillotine Dampers are used only when the mill is to be isolated, due to sharp temperature variation, the blades of these Guillotine Damper are found to get warped over a period of time.