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    VALVE UNIT AND GAS METER INCLUDING SAID VALVE UNIT
    2.
    发明公开
    VALVE UNIT AND GAS METER INCLUDING SAID VALVE UNIT 有权
    与阀单元阀单元和气体计量表

    公开(公告)号：EP2475918A1

    公开(公告)日：2012-07-18

    申请号：EP10725157.1

    申请日：2010-06-11

    申请人： Sit La Precisa S.p.A. con socio unico

    发明人： BORTOLIERO, Michele ,  PLAIAN, Teodora ,  PERON, Luca ,  TURRIN, Gianpiero

    IPC分类号： F16K31/128 ,  F16K31/40 ,  F16K31/165

    CPC分类号： F16K31/402 ,  F16K31/128 ,  F16K31/165 ,  Y10T137/7762 ,  Y10T137/7769 ,  Y10T137/7782

    摘要： A valve unit for controlling the delivery of a combustible gas, in particular for delivery via a gas metering apparatus including a main gas through-flow pipe (2), the unit comprising a servovalve with a first valve seat (3) provided on the pipe and associated with a respective first shutter (6) with diaphragm control (7) for the opening of the seat (3) in opposition to a first return spring (22), an operating chamber (10) for controlling the servovalve, the chamber being in communication with an inlet section (4) of the main pipe (2), upstream of the first valve seat (3), one side (7a) of the diaphragm (7) being subjected to the pressure prevailing in the chamber (10), the other side (7b) being subjected to the pressure prevailing downstream of the first valve seat, in the region of an outlet section (5) of the pipe (2), the operating chamber (10) being in communication with the outlet section (5) via a second valve seat (9) co-operating with a second shutter (8).