Device and method for determining permeability of a circulating band

摘要

The assembly (10) to test the permeability of a continuous belt (11), and especially a water-absorbent press blanket in a papermaking machine, has a jet (12) to deliver a measurement fluid at and through the belt. A monitor (104) registers the belt movement speed and/or a monitor (19) establishes the jet stream speed and the jet pressure is recorded by a diaphragm (102) flanked by pressure sensors (100,101). The three measurements are taken simultaneously so that a deviation in one cannot affect the accuracy of the permeability test at the evaluation unit (105).