Bed limiter keeps the packed bed from moving and maintains the top surface of the bed level. They are attached and mounted to the walls of the column or freely positioned on the packing.
Bed limiters can be fabricated and supplied in a range of thermoplastics, stainless steel and alloys.
Bed limiters are used for metal and plastic random packing as well as structured packing. They hold down plates retaining devices and are used above packed beds to prevent fluidization and restrict packing movement, which can occur during bad conditions.
The purpose of a packed bed is to improve contact between two phases in a chemical process. Packed beds can be used in a chemical reactor, a distillation process, or a scrubber.