Design Features

The FMB-VM is a water tube type steam boiler for medium power range.

The radiation heat transfer is performed in the membrane wall furnace

of cylindrical design, whilst the convection heat transfer is carried out

through special pin elements / rifled plain smoke tubes. The convection

part can be equipped with rifled plain smoke tubes on request up to

16 t/h steam capacity.

An effective natural water circulation is ensured in all areas of the boiler

by means of several external downcomer pipes connecting the water /

steam drum with the ring-shaped collector at the boiler basement.

The special spherical shape of the furnace top plate gives an increased

stability against ship vibrations and protects this part of the boiler against

partial overheating, because residues in the boiler water are led to the

downcomer connections on the periphery of the drum before they can

accumulate on the furnace top plate.