Alfa Disc - Alfa Laval - #1

Text version of the page

All-welded Plate Heat Exchanger AlfaDisc Applications AlfaDisc is suitable for most of the applications, such as general cooling and heating duties, condensation, evaporation, reboiling and stream heating. Standard design AlfaDisc is built on the Plate & Shell concept. It is able to withstand higher design pressure, is more compact, is better developed for fatigue applications, has the possibility for asymmetric fl ow and is cleanable on one side. These features in combination with an attractive price give us a range of competitive advantages over other welded concepts. The AlfaDisc all-welded plate heat exchanger provides the thermal effi ciency and compactness of a plate and frame unit under conditions that would normally call for a shell and tube unit. Designed for use with liquids, gases and two-phase mixtures at pressure up to 100 bars (CE/PED) and 47 bars (ASME) and at temperatures up to 538°C, the Plate&Shell unit works well with aggressive media, such as organic solvents, steam heaters and interchangers that are beyond the capability of a gasketed unit. The unit is also available with removable core design. Typical capacities Liquid fl ow rate Up to 139 kg/s (2085 gpm), depending on media, permitted pressure drop and temperature program. Sizes AlfaDisc 50 AlfaDisc 100 AlfaDisc 150 Working principle The unit features a plate side and a shell side, which offer high pressure ratings. It has alternating channels for hot and cold media, and can offer true counter-current or co-current fl ow. Number of passes could be up to 4 on each side. Nozzle sizes up to DN 400 can be accommodated on the shell side of the exchanger, offering higher steam and liquid fl ow rates. Nozzles on the plate side can be up to DN 150. AlfaDisc 50 Turning plate port Bypass restriction diverters Shell divider Flow principle of a multi-pass AlfaDisc. The AlfaDisc unit can be fabricated from dissimilar metals when only one side will be exposed to corrosive conditions.