Patent ID: 9128490
Filing Date: 2015-09-08
Classification: B60H,F24F,G01F,G05D,Y10T

Abstract:
1. Butterfly valve ( 2 ) for arrangement in a flow duct ( 1 ) of an air-conditioning installation, the butterfly valve ( 2 ) comprising two butterfly valve faces and being mounted rotatably about a swivel axis ( 3 ), and a device with at least two measurement points for determining the volume flow rate of a gaseous medium flowing in the flow duct being provided, characterized in that the butterfly valve ( 2 ) comprises at least one hollow chamber ( 4 , 5 ) on each of its two butterfly valve faces, each hollow chamber ( 4 , 5 ) being provided with at least one recess ( 6 ), preferably with a multiplicity of recesses ( 6 ) formed in the manner of a perforation, and one measurement point being associated with one hollow chamber ( 4 or 5 ) and the other measurement point being associated with the other hollow chamber ( 5 or 4 ).