Valve arrangement for an industrial dust extractor

Abstract

A valve arrangement () for generating a pulse of air () to clean an air filter () of a pre-separator (), the arrangement () comprising: a main valve closure body () arranged to seal a passage () between a high pressure (P) side and a low pressure (P) side of the valve arrangement (), a control body (), connected to the main valve closure body (), such that a position of the main valve closure body () Is determined by a position of the control body (), a control chamber (), partially defined by the control body (), whereby a volume of the control chamber () Is variable In relation to the position of the control body (), and a control chamber valve () having an open state and a closed state for regulating a pressure (P) In the control chamber, wherein the control chamber () Is fluidly connected to the low pressure (P) side via a connecting channel () configured with a connecting channel aperture (), wherein the control chamber valve () Is configured with an aperture larger than the connecting channel aperture () such that the control chamber valve () Is arranged to overcome the connecting channel (), and wherein the state of the control chamber valve () Is determined by a trigger device (). The arrangement also comprises a resilient trigger membrane () arranged between the high-pressure (P) side and the low pressure (P) side wherein the state of the control chamber valve () is determined by the position of the resilient trigger membrane ().