Siemens Booster Relays - 61H and 61VH西门子空气放大器、空气促进器
常见型号：
Models 61H Models 61L Models 61F Models 61FE Models 61VH
The series 61 Booster Relays reproduce pneumatic signals in a 1:1 ratio for applications where input isolation or increased flow capacity are required.
61H is a High-Capacity Booster Relay designed to improve the stroking speed of large diaphragm valves.
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 input and output, which eliminates the need for an externally piped bypass.
