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    Valve device for intercepting faulty circuits in pneumatic plants with a plurality of circuits
    2.
    发明授权
    Valve device for intercepting faulty circuits in pneumatic plants with a plurality of circuits 失效
    用于在具有多个电路的气动植物中接触不良电路的阀装置

    公开(公告)号：US3575195A

    公开(公告)日：1971-04-20

    申请号：US3575195D

    申请日：1969-05-12

    申请人： MAGNETI MARELLI SPA

    发明人： ALFIERI GIUSEPPE

    IPC分类号： F16K17/30 ,  F16K31/12

    CPC分类号： F16K17/30 ,  Y10T137/4857 ,  Y10T137/7781

    摘要： A valve device for use in a pneumatic plant having several utilization circuits fed by a single compressor through a single regulator, which device serves to isolate a faulty circuit. The valve device comprises a piston controlled shutoff valve. The piston is spring biased to a valve-closed position and is moved against the spring bias to a valve-open position by normal operating pressure. A drop from normal operating pressure causes the piston to close the valve thereby isolating the faulty circuit.