Metal filter cloth with pre-determinable pore size and permeability

摘要

Compared to other filter media, the specific properties of a woven wire mesh may be precisely described geometrically and defined through the type of weave, wire diameter and mesh count. For users and manufacturers of woven wire filters, this is a considerable advantage because geometric pore size and permeability can be precisely calculated without the need for exhaustive measuring methods. A characteristic value is determined for the geometric pore and describes the diameter of a round sphere that is just able to pass through the wire mesh. The pressure drop coefficient for air in laminar flow is used for determining permeability. The mathematical formulae behind this process were developed in cooperation with the University of Stuttgart, Stuttgart/Germany, within the scope of AVIF projects A224 and A251, and experimentally validated by glass bead tests and air flow-through measurements.