Burner / PF Pipe Isolating Dampers isolate the mill and its associated components from the running boiler and possible flashback from the boiler through the pulverised fuel pipes.

For this reason, Burner Isolators are situated as close as possible to the boiler.

The Isolators are closed during maintenance on the mill internals and primary air and pulverised fuel systems. Orifices are often required in pulverised fuel pipes to offset differences in total pipe length and balance pressure between the fuel pipes on each mill. The Burner Isolators are designed so that the housing will also accommodate an orifice plate.

PF Pipe Isolating Dampers comply with National Fire Prevention Association (NFPA) code requirements, being designed for 350 kPa service and tested at 1 400 kPa.