Blanking Plate
Blanking plates are used as a secondary (backup) shut-off device downstream of diverters and louver dampers. They typically slide into position (guillotine) or are bolted in place. Sealing is achieved by a ledge type design or by means of a gasket.
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Function:
- Provides additional protection for maintenance personnel working in the HRSG downstream of the primary shut-off device when the gas turbine is in open cycle operation
Advantages:
- Low pressure drop in open position
- Simple and sturdy design
- Further reduced heat radiation due to insulated blade
Parameters:
| Size: | up to 64 m˛ |
| Temp. range: | up to 670 °C |
| Pressure: | up to 100 mbar |
| Materials: | carbon steels, stainless steels |
| Actuation: | electric or manual |
| Insulation: | internal (standard), external |