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Siemens 61L空气放大器
Model 61系列空气放大器常见型号有：
Models 61H Models 61L Models 61F Models 61FE Models 61VH
61系列升压继电器以1:1的比例复制的气动信号的应用中，输入隔离或增加的流量要求。
The series 61 Booster Relays reproduce pneumatic signals in a 1:1 ratio for applications where bbbbb isolation or increased flow capacity are required.
61h是一种高容量升压继电器设计改进的冲击速度大隔膜阀。
61H is a High-Capacity Booster Relay designed to improve the stroking speed of large diaphragm valves.
61vh是一种高容量升压继电器设计用于对控制阀等执行器，需要非常快的开关速度。无论是61H和61vh特征稳定的旁路针型阀的输入和输出之间，从而消除了对外部管道旁路的需要
61VH is a High-Capacity Booster Relay designed for use on control valve actuators that require very fast stroking speeds. Both 61H and 61VH feature a stabilizing bypass needle valve between the bbbbb and output, which eliminates the need for an externally piped bypass.
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