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1. (WO2013117577) DIFFERENTIAL PRESSURE GAS FLOW MEASURING DEVICE

Pub. No.:    WO/2013/117577    International Application No.:    PCT/EP2013/052301
Publication Date: Fri Aug 16 01:59:59 CEST 2013 International Filing Date: Thu Feb 07 00:59:59 CET 2013
IPC: F16K 3/08
G01F 1/42
Applicants: BERTONI PROJECT DEVELOPMENT LTD.
Inventors: KRAMER, Albert
Title: DIFFERENTIAL PRESSURE GAS FLOW MEASURING DEVICE
Abstract:
A gas flow measuring device (101 ) has a housing (121, 123) comprising a gas inlet (124) and a gas outlet (122). A valve with an adjustable restriction (103) and an actuator (107) for adjusting the restriction (103) is arranged between the gas inlet (124) and the gas outlet (122) for restricting the gas flow from the gas inlet (124) to the gas outlet (122). The restriction (103) comprises a substantially circular-shaped rotatable disc (105) having a first and an opposite second disc surface, and at least one disc passage (1 10); and a mount (106) having a mount surface (126) facing and contacting the first disc surface (1 16), and a mount passage (1 1 1 ). At least one of the first disc surface (1 16) and the mount surface (126) comprises a ring-shaped area (130) extending above the surface thereof contacting the other one of the first disc surface (1 16) and the mount surface (126). The mount (106) further comprises a ring-shaped part (104) contacting the second disc surface (1 12).